Rainbow-electronics DS26503 Uživatelský manuál

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1 of 123
REV: 070904
Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device
may be simultaneously available through various sales channels. For information about device errata, click here: www.maxim-ic.com/errata
.
GENERAL DESCRIPTION
The DS26503 is a building-integrated timing-
supply (BITS) clock-recovery element. The
receiver portion can recover a clock from T1,
E1, and 6312kHz synchronization timing
interfaces. In T1 and E1 modes, the
Synchronization Status Message (SSM) can also
be recovered. The transmit portion can directly
interface to T1 or E1 interfaces as well as source
the SSM in T1 and E1 modes. The DS26503 can
translate between any of the supported inbound
synchronization clock rates to any supported
outbound rate. A separate output is provided to
source a 6312kHz clock. The device is
controlled through a parallel, serial, or hardware
controller port.
APPLICATIONS
BITS Timing
Rate Conversion
Basic Transceiver
ORDERING INFORMATION
PART TEMP RANGE PIN-PACKAGE
DS26503L 0°C to +70°C 64 LQFP
DS26503LN -40°C to +85°C 64 LQFP
FEATURES
§ G.703 2048kHz Synchronization Interface
Compliant
§ G.703 6312kHz Japanese Synchronization
Interface Compliant
§ Interfaces to Standard T1/J1 (1.544MHz) and
E1 (2.048MHz)
§ Interface to CMI-Coded T1/J1 and E1
§ Short- and Long-Haul Line Interface
§ Transmit and Receive T1 and E1 SSM
Messages with Message Validation
§ Crystal-Less Jitter Attenuator with Bypass
Mode
§ Fully Independent Transmit and Receive
Functionality
§ Internal Software-Selectable Receive- and
Transmit-Side Termination for
75/100/110/120
§ Monitor Mode for Bridging Applications
§ Accepts 16.384MHz, 8.192MHz, 4.096MHz,
2.048MHz, or 1.544MHz (T1 Only) Master
Clock
§ 8-Bit Parallel Control Port, Multiplexed or
Nonmultiplexed, Intel or Motorola
§ Serial (SPI) Control Port
§ Hardware Control Mode
§ Provides LOS, AIS, and LOF Indications
Through Hardware Output Pins
§ Fast Transmitter-Output Disable Through
Device Pin for Protection Switching
§ IEEE 1149.1 JTAG Boundary Scan
§ 3.3V Supply with 5V-Tolerant Inputs and
Outputs
DS26503
T1/E1/J1 BITS Element
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Strany 1 - T1/E1/J1 BITS Element

1 of 123 REV: 070904 Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple

Strany 2 - TABLE OF CONTENTS

DS26503 T1/E1/J1 BITS Element 10 of 123 Table 2-2. E1-Related Telecommunications Specifications ITUT G.703 Physical/Electrical Characteristics of G.

Strany 3 - 3 of 123

DS26503 T1/E1/J1 BITS Element 100 of 123 Select-IR-Scan All test registers retain their previous state. The instruction register will remain unchang

Strany 4 - 4 of 123

DS26503 T1/E1/J1 BITS Element 101 of 123 Figure 16-2. TAP Controller State Diagram 1001111111111110000010000110000

Strany 5 - LIST OF FIGURES

DS26503 T1/E1/J1 BITS Element 102 of 123 16.1 Instruction Register The instruction register contains a shift register as well as a latched parallel

Strany 6 - LIST OF TABLES

DS26503 T1/E1/J1 BITS Element 103 of 123 IDCODE When the IDCODE instruction is latched into the parallel instruction register, the identification te

Strany 7 - 1.3 Jitter Attenuator

DS26503 T1/E1/J1 BITS Element 104 of 123 Table 16-4. Boundary Scan Control Bits CELL # NAME TYPE CONTROL CELL 0 AD1 Output3 1 1 AD1_7_CTRL Control

Strany 8 - 1.6 Control Port

DS26503 T1/E1/J1 BITS Element 105 of 123 CELL # NAME TYPE CONTROL CELL 28 TPOSO observe_only 29 TNEGO observe_only 30 TCLKO observe_only 31 TCL

Strany 9 - 2. SPECIFICATIONS COMPLIANCE

DS26503 T1/E1/J1 BITS Element 106 of 123 17. FUNCTIONAL TIMING DIAGRAMS 17.1 Processor Interface 17.1.1 Parallel Port Mode See the AC Timing sectio

Strany 10 - 10 of 123

DS26503 T1/E1/J1 BITS Element 107 of 123 Figure 17-4. SPI Serial Port Access, Read Mode, CPOL = 1, CPHA = 1 Figure 17-5. SPI Serial Port

Strany 11 - 11 of 123

DS26503 T1/E1/J1 BITS Element 108 of 123 Figure 17-7. SPI Serial Port Access, Write Mode, CPOL = 0, CPHA = 1 Figure 17-8. SPI Serial Po

Strany 12 - Figure 3-1. Block Diagram

DS26503 T1/E1/J1 BITS Element 109 of 123 18. OPERATING PARAMETERS ABSOLUTE MAXIMUM RATINGS Voltage Range on Any Pin Relative to Ground……………………………………

Strany 13 - 13 of 123

DS26503 T1/E1/J1 BITS Element 11 of 123 Table 2-3. E1-Related Telecommunications Specifications (continued) (ETSI) “Business Telecommunications (BT)

Strany 14 - (HARDWARE MODE PIN NAME)

DS26503 T1/E1/J1 BITS Element 110 of 123 Table 18-5. DC Characteristics (VDD = 3.3V ±5%, TA = 0°C to +70°C for DS26503L; VDD = 3.3V ±5%, TA = -40°C

Strany 15 - 4.2 Transmit Side

DS26503 T1/E1/J1 BITS Element 111 of 123 19. AC TIMING PARAMETERS AND DIAGRAMS Capacitive test loads are 40pF for bus signals and 20pF for all othe

Strany 16 - 4.3 Receive Side

DS26503 T1/E1/J1 BITS Element 112 of 123 Figure 19-1. Intel Bus Read Timing (BTS = 0 / BIS[1:0] = 00) Figure 19-2. Intel Bus Write Tim

Strany 17 - 4.4 Controller Interface

DS26503 T1/E1/J1 BITS Element 113 of 123 Figure 19-3. Motorola Bus Timing (BTS = 1 / BIS[1:0] = 00) t ASD ASHPW t t ASL AHLtCSt ASL ttt DSWDHW t CH

Strany 18 - 18 of 123

DS26503 T1/E1/J1 BITS Element 114 of 123 19.2 Nonmultiplexed Bus Table 19-2. AC Characteristics, Non-Mux Parallel Port (VDD = 3.3V ±5%, TA = 0°C to

Strany 19 - 19 of 123

DS26503 T1/E1/J1 BITS Element 115 of 123 Figure 19-4. Intel Bus Read Timing (BTS = 0 / BIS[1:0] = 01) Figure 19-5. Intel Bus Write

Strany 20 - 20 of 123

DS26503 T1/E1/J1 BITS Element 116 of 123 Figure 19-6. Motorola Bus Read Timing (BTS = 1 / BIS[1:0] = 01) Figure 19-7. Motorola B

Strany 21 - 4.6 Line Interface

DS26503 T1/E1/J1 BITS Element 117 of 123 19.3 Serial Bus Table 19-3. AC Characteristics, Serial Bus (VDD = 3.3V ±5%, TA = 0°C to +70°C for DS26503

Strany 22 - 4.7 Power

DS26503 T1/E1/J1 BITS Element 118 of 123 Figure 19-8. SPI Interface Timing Diagram, CPHA = 0, BIS[1:0] = 10 Figure 19-9. SPI I

Strany 23 - Table 5-1. LQFP Pinout

DS26503 T1/E1/J1 BITS Element 119 of 123 19.4 Receive Side AC Characteristics Table 19-4. Receive Side AC Characteristics (VDD = 3.3V ±5%, TA = 0°

Strany 24 - INT INT JACKS

DS26503 T1/E1/J1 BITS Element 12 of 123 3. BLOCK DIAGRAMS Figure 3-1. Block Diagram RX LIURX LIUT1/E1 SSM FRAMERCLOCK- DATATX LIUT1/E1 SSMFORMATTE

Strany 25 - WR (R/W) — TMODE3

DS26503 T1/E1/J1 BITS Element 120 of 123 Figure 19-10. Receive Timing, T1/E1 t D1 t D2 RSER RSRCLK E1 = MSB of Channel 1T1 = F-Bit

Strany 26 - 6.2 Internal Termination

DS26503 T1/E1/J1 BITS Element 121 of 123 19.5 Transmit Side AC Characteristics Table 19-5. Transmit Side AC Characteristics (VDD = 3.3V ±5%, TA = -

Strany 27 - 6.4 Receiver Operating Modes

DS26503 T1/E1/J1 BITS Element 122 of 123 Figure 19-11. Transmit Timing, T1/E1 20. REVISION HISTORY REVISION DESCRI

Strany 28 - 6.6 MCLK Pre-Scaler

DS26503 T1/E1/J1 BITS Element 123 of 123 Maxim/Dallas Semiconductor cannot assume responsibility for use of any circuitry other than circuitry entir

Strany 29 - 29 of 123

DS26503 T1/E1/J1 BITS Element 13 of 123 Figure 3-2. Loopback Mux Diagram Figure 3-3. Transmit PLL Clock Mux Diagram TX P

Strany 30 - Table 7-1. Port Mode Select

DS26503 T1/E1/J1 BITS Element 14 of 123 Figure 3-4. Master Clock PLL Diagram PRE-SCALERDIVIDE BY 1, 2, 4,OR 8MCLK PIN2.048MHz to1.544MHz PLL

Strany 31 - 7.2.6 Register Reads

DS26503 T1/E1/J1 BITS Element 15 of 123 4. PIN FUNCTION DESCRIPTION 4.1 Transmit PLL NAME TYPE FUNCTION PLL_OUT O Transmit PLL Output. 1544kHz, 2

Strany 32 - 7.3 Register Map

DS26503 T1/E1/J1 BITS Element 16 of 123 4.3 Receive Side NAME TYPE FUNCTION RCLK O Receive Clock. Recovered 1.544MHz (T1), 2.048MHz (E1), or 6312 k

Strany 33 - 33 of 123

DS26503 T1/E1/J1 BITS Element 17 of 123 4.4 Controller Interface NAME TYPE FUNCTION INT/ JACKS I/O Interrupt/JA Clock Source Select 1 INT: Flags h

Strany 34 - 7.3.2 Test Reset Register

DS26503 T1/E1/J1 BITS Element 18 of 123 NAME TYPE FUNCTION AD[4]/ RMODE0 I/O Data Bus D[4] or Address/Data Bus AD[4]/Receive Framing Mode Select Bi

Strany 35

DS26503 T1/E1/J1 BITS Element 19 of 123 NAME TYPE FUNCTION A6/MPS0 I Address Bus Bit A[6]/MCLK Prescale Select A6: In nonmultiplexed bus operation

Strany 36

DS26503 T1/E1/J1 BITS Element 2 of 123 TABLE OF CONTENTS 1. FEATURES...

Strany 37

DS26503 T1/E1/J1 BITS Element 20 of 123 NAME TYPE FUNCTION A0/E1TS I Address Bus Bit A[0]/E1 Termination Select A0: In nonmultiplexed bus operation

Strany 38 - 7.5 Status Registers

DS26503 T1/E1/J1 BITS Element 21 of 123 4.5 JTAG NAME TYPE FUNCTION JTCLK I JTAG Clock. This clock input is typically a low frequency (less than 10

Strany 39 - 7.6 Information Registers

DS26503 T1/E1/J1 BITS Element 22 of 123 4.7 Power NAME TYPE FUNCTION DVDD — Digital Positive Supply. 3.3V ±5%. Should be tied to the RVDD and TVDD

Strany 40 - 8.1 T1 Control Registers

DS26503 T1/E1/J1 BITS Element 23 of 123 5. PINOUT Table 5-1. LQFP Pinout MODE PIN TYPE PARALLEL PORT SERIAL PORT HARDWARE FUNCTION 1 I/O AD2 SCL

Strany 41

DS26503 T1/E1/J1 BITS Element 24 of 123 MODE PIN TYPE PARALLEL PORT SERIAL PORT HARDWARE FUNCTION 17 I TCLK TCLK TCLK External Transmit Clock

Strany 42

DS26503 T1/E1/J1 BITS Element 25 of 123 MODE PIN TYPE PARALLEL PORT SERIAL PORT HARDWARE FUNCTION 60 I CS CS RLB Parallel Port Mode: Chip Select (

Strany 43

DS26503 T1/E1/J1 BITS Element 26 of 123 6. HARDWARE CONTROLLER INTERFACE In Hardware Controller mode, the parallel and serial port pins are reconf

Strany 44

DS26503 T1/E1/J1 BITS Element 27 of 123 6.3 Line Build-Out Table 6-3. E1 Line Build-Out L2 PIN 13 L1 PIN 12 L0 PIN 11 APPLICATION N (1) RETURN LOS

Strany 45 - Table 8-1. T1 Alarm Criteria

DS26503 T1/E1/J1 BITS Element 28 of 123 6.5 Transmitter Operating Modes Table 6-6.Transmit Path Operating Mode TMODE3 PIN 62 TMODE2 PIN 48 TMODE1 PI

Strany 46 - 9.1 E1 Control Registers

DS26503 T1/E1/J1 BITS Element 29 of 123 Table 6-8. MCLK Pre-Scaler for E1 Mode MPS1 PIN 16 MPS0 PIN 15 JACKS PIN 46 MCLK (MHz) 0 0 0 2.048 0 0 1 Res

Strany 47

DS26503 T1/E1/J1 BITS Element 3 of 123 8. T1 FRAMER/FORMATTER CONTROL REGISTERS ...40 8.1 T1 CONT

Strany 48

DS26503 T1/E1/J1 BITS Element 30 of 123 7. PROCESSOR INTERFACE The DS26503 is controlled via a nonmultiplexed (BIS[1:0] = 01) or a multiplexed (BIS[

Strany 49 - Table 9-2. E1 Alarm Criteria

DS26503 T1/E1/J1 BITS Element 31 of 123 are terminated when CS is removed. If CS is removed before all 8 bits of the data are read, the remaining da

Strany 50

DS26503 T1/E1/J1 BITS Element 32 of 123 7.3 Register Map Table 7-2. Register Map Sorted By Address ADDRESS TYPE REGISTER NAME REGISTER ABBREVIATION

Strany 51

DS26503 T1/E1/J1 BITS Element 33 of 123 ADDRESS TYPE REGISTER NAME REGISTER ABBREVIATION 43 R/W Transmit Si Non-Align Frame TSiNAF 44 R/W Tran

Strany 52

DS26503 T1/E1/J1 BITS Element 34 of 123 7.3.1 Power-Up Sequence The DS26503 contains an on-chip power-up reset function, which automatically clears

Strany 53 - Table 10-1. TS Pin Functions

DS26503 T1/E1/J1 BITS Element 35 of 123 7.3.3 Mode Configuration Register Register Name: MCREG Register Description: Mode Configuration Register R

Strany 54 - TSINV — — — —

DS26503 T1/E1/J1 BITS Element 36 of 123 Bit 4-7/ Transmit Mode Configuration (TMODE[3:0]). Used to select the operating mode of the transmit path fo

Strany 55 - 11.2 Transmit BOC

DS26503 T1/E1/J1 BITS Element 37 of 123 Bit 3-4/Transmit PLL Input Frequency Select (TPLLIFS[1:0]). These bits are used to indicate the reference

Strany 56 - 11.3 Receive BOC

DS26503 T1/E1/J1 BITS Element 38 of 123 7.4 Interrupt Handling Various alarms, conditions, and events in the DS26503 can cause interrupts. For simpl

Strany 57

DS26503 T1/E1/J1 BITS Element 39 of 123 7.6 Information Registers Information registers operate the same as status registers except they cannot caus

Strany 58

DS26503 T1/E1/J1 BITS Element 4 of 123 17. FUNCTIONAL TIMING DIAGRAMS ...

Strany 59

DS26503 T1/E1/J1 BITS Element 40 of 123 8. T1 FRAMER/FORMATTER CONTROL REGISTERS The T1 framer portion of the DS26503 is configured via a set of fi

Strany 60

DS26503 T1/E1/J1 BITS Element 41 of 123 Register Name: T1RCR2 Register Description: T1 Receive Control Register 2 Register Address: 04h Bit # 7 6

Strany 61

DS26503 T1/E1/J1 BITS Element 42 of 123 Register Name: T1TCR1 Register Description: T1 Transmit Control Register 1 Register Address: 05h Bit # 7

Strany 62

DS26503 T1/E1/J1 BITS Element 43 of 123 Register Name: T1TCR2 Register Description: T1 Transmit Control Register 2 Register Address: 06h Bit # 7

Strany 63

DS26503 T1/E1/J1 BITS Element 44 of 123 Register Name: T1CCR Register Description: T1 Common Control Register Register Address: 07h Bit # 7 6 5

Strany 64 - Table 12-1. E1 SSM Messages

DS26503 T1/E1/J1 BITS Element 45 of 123 Table 8-1. T1 Alarm Criteria ALARM SET CRITERIA CLEAR CRITERIA Blue Alarm (AIS) (Note 1) Over a 3ms windo

Strany 65

DS26503 T1/E1/J1 BITS Element 46 of 123 9. E1 FRAMER/FORMATTER CONTROL REGISTERS The E1 framer portion of the DS26503 is configured via a set of tw

Strany 66

DS26503 T1/E1/J1 BITS Element 47 of 123 Table 9-1. E1 Sync/Resync Criteria FRAME OR MULTIFRAME LEVEL SYNC CRITERIA RESYNC CRITERIA ITU SPEC. FAS

Strany 67

DS26503 T1/E1/J1 BITS Element 48 of 123 9.2 E1 Information Registers Register Name: INFO2 Register Description: Information Register 2 Register Ad

Strany 68

DS26503 T1/E1/J1 BITS Element 49 of 123 Table 9-2. E1 Alarm Criteria ALARM SET CRITERIA CLEAR CRITERIA ITU SPEC. RLOF An RLOF condition exists on

Strany 69

DS26503 T1/E1/J1 BITS Element 5 of 123 LIST OF FIGURES Figure 3-1. Block Diagram ...

Strany 70

DS26503 T1/E1/J1 BITS Element 50 of 123 Register Name: SR2 Register Description: Status Register 2 Register Address: 16h Bit # 7 6 5 4 3 2 1 0 Na

Strany 71

DS26503 T1/E1/J1 BITS Element 51 of 123 Register Name: IMR2 Register Description: Interrupt Mask Register 2 Register Address: 17h Bit # 7 6 5 4 3

Strany 72

DS26503 T1/E1/J1 BITS Element 52 of 123 10. I/O PIN CONFIGURATION OPTIONS Register Name: IOCR1 Register Description: I/O Configuration Register 1

Strany 73

DS26503 T1/E1/J1 BITS Element 53 of 123 Table 10-1. TS Pin Functions TRANSMIT MODE IOCR.3 IOCR.2 IOCR.1 TS FUNCTION T1/E1 0 0 0 Frame sync input

Strany 74

DS26503 T1/E1/J1 BITS Element 54 of 123 Register Name: IOCR2 Register Description: I/O Configuration Register 2 Register Address: 02h Bit # 7 6 5

Strany 75

DS26503 T1/E1/J1 BITS Element 55 of 123 11. T1 SYNCHRONIZATION STATUS MESSAGE The DS26503 has a BOC controller to handle SSM services in T1 mode.

Strany 76

DS26503 T1/E1/J1 BITS Element 56 of 123 11.3 Receive BOC The receive BOC function is enabled by setting BOCC.4 = 1. The RFDL register will now opera

Strany 77

DS26503 T1/E1/J1 BITS Element 57 of 123 Register Name: BOCC Register Description: BOC Control Register Register Address: 1Fh Bit # 7 6 5 4 3 2 1

Strany 78 - 13.2 LIU Receiver

DS26503 T1/E1/J1 BITS Element 58 of 123 Register Name: RFDL (RFDL register bit usage when BOCC.4 = 1) Register Description: Receive FDL Register R

Strany 79 - 13.3 LIU Transmitter

DS26503 T1/E1/J1 BITS Element 59 of 123 Register Name: SR3 Register Description: Status Register 3 Register Address: 18h Bit # 7 6 5 4 3 2 1

Strany 80 - 13.5 Jitter Attenuator

DS26503 T1/E1/J1 BITS Element 6 of 123 LIST OF TABLES Table 2-1. T1-Related Telecommunications Specifications...

Strany 81 - Figure 13-3. CMI Coding

DS26503 T1/E1/J1 BITS Element 60 of 123 Register Name: IMR3 Register Description: Interrupt Mask Register 3 Register Address: 19h Bit # 7 6 5 4 3

Strany 82 - 13.7 LIU Control Registers

DS26503 T1/E1/J1 BITS Element 61 of 123 Register Name: SR4 Register Description: Status Register 4 Register Address: 1Ah Bit # 7 6 5 4 3 2 1 0 Na

Strany 83

DS26503 T1/E1/J1 BITS Element 62 of 123 Register Name: IMR4 Register Description: Interrupt Mask Register 4 Register Address: 1Bh Bit # 7 6 5 4 3

Strany 84

DS26503 T1/E1/J1 BITS Element 63 of 123 Register Name: TFDL Register Description: Transmit FDL Register Register Address: 51h Bit # 7 6 5 4 3 2

Strany 85

DS26503 T1/E1/J1 BITS Element 64 of 123 12. E1 SYNCHRONIZATION STATUS MESSAGE The DS26503 provides access to both the transmit and receive Sa/Si b

Strany 86

DS26503 T1/E1/J1 BITS Element 65 of 123 Register Name: RSiAF Register Description: Receive Si Bits of the Align Frame Register Address: 58h Bit #

Strany 87

DS26503 T1/E1/J1 BITS Element 66 of 123 Register Name: RRA Register Description: Receive Remote Alarm Register Address: 5Ah Bit # 7 6 5 4 3 2 1

Strany 88

DS26503 T1/E1/J1 BITS Element 67 of 123 Register Name: RSa5 Register Description: Receive Sa5 Bits Register Address: 5Ch Bit # 7 6 5 4 3 2 1 0

Strany 89

DS26503 T1/E1/J1 BITS Element 68 of 123 Register Name: RSa7 Register Description: Receive Sa7 Bits Register Address: 5Eh Bit # 7 6 5 4 3 2 1 0

Strany 90 - Figure 13-4. Basic Interface

DS26503 T1/E1/J1 BITS Element 69 of 123 Register Name: TSiAF Register Description: Transmit Si Bits of the Align Frame Register Address: 42h Bit #

Strany 91

DS26503 T1/E1/J1 BITS Element 7 of 123 1. FEATURES 1.1 General § 64-pin, 10mm x 10mm LQFP package § 3.3V supply with 5V-tolerant inputs and output

Strany 92 - 92 of 123

DS26503 T1/E1/J1 BITS Element 70 of 123 Register Name: TRA Register Description: Transmit Remote Alarm Register Address: 44h Bit # 7 6 5 4 3 2 1

Strany 93 - 93 of 123

DS26503 T1/E1/J1 BITS Element 71 of 123 Register Name: TSa5 Register Description: Transmit Sa5 Bits Register Address: 46h Bit # 7 6 5 4 3 2 1 0

Strany 94

DS26503 T1/E1/J1 BITS Element 72 of 123 Register Name: TSa7 Register Description: Transmit Sa7 Bits Register Address: 48h Bit # 7 6 5 4 3 2 1 0

Strany 95

DS26503 T1/E1/J1 BITS Element 73 of 123 Register Name: TSACR Register Description: Transmit Sa Bit Control Register Register Address: 4Ah Bit # 7

Strany 96 - 14. LOOPBACK CONFIGURATION

DS26503 T1/E1/J1 BITS Element 74 of 123 12.2 Alternate Sa/Si Bit Access Based on Double-Frame On the receive side, the RAF and RNAF registers will

Strany 97 - 97 of 123

DS26503 T1/E1/J1 BITS Element 75 of 123 Register Name: RNAF Register Description: Receive Non-Align Frame Register Register Address: 57h Bit # 7

Strany 98 - 10kW 10kW 10kW

DS26503 T1/E1/J1 BITS Element 76 of 123 Register Name: TNAF Register Description: Transmit Non-Align Frame Register Register Address: 41h Bit # 7

Strany 99 - 99 of 123

DS26503 T1/E1/J1 BITS Element 77 of 123 13. LINE INTERFACE UNIT (LIU) The LIU in the DS26503 contains three sections: the receiver, which handles c

Strany 100 - 100 of 123

DS26503 T1/E1/J1 BITS Element 78 of 123 13.1 LIU Operation The analog AMI/HDB3 waveform off of the E1 line or the AMI/B8ZS waveform off of the T1 li

Strany 101 - 101 of 123

DS26503 T1/E1/J1 BITS Element 79 of 123 13.2.2 Receive G.703 Section 10 Synchronization Signal The DS26503 can receive a 2.048MHz square-wave synch

Strany 102 - 16.1 Instruction Register

DS26503 T1/E1/J1 BITS Element 8 of 123 1.4 Framer/Formatter § Full receive and transmit path transparency § T1 framing formats include D4 and ESF

Strany 103 - 103 of 123

DS26503 T1/E1/J1 BITS Element 80 of 123 The transmit line drive has two modes of operation: fixed gain or automatic gain. In the fixed gain mode, t

Strany 104 - 104 of 123

DS26503 T1/E1/J1 BITS Element 81 of 123 15 or 17 instead of the normal 16 to keep the buffer from overflowing. When the device divides by either 15

Strany 105 - 105 of 123

DS26503 T1/E1/J1 BITS Element 82 of 123 13.7 LIU Control Registers Register Name: LIC1 Register Description: Line Interface Control 1 Register Add

Strany 106 - 17.1.2 SPI Serial Port Mode

DS26503 T1/E1/J1 BITS Element 83 of 123 T1 Mode L2 L1 L0 APPLICATION N (1) RETURN LOSS Rt (1) 0 0 0 DSX-1 (0 to 133 feet)/0dB CSU 1:2 N.M

Strany 107

DS26503 T1/E1/J1 BITS Element 84 of 123 Register Name: LIC2 Register Description: Line Interface Control 2 Register Address: 31h Bit # 7 6 5 4 3

Strany 108

DS26503 T1/E1/J1 BITS Element 85 of 123 Register Name: LIC3 Register Description: Line Interface Control 3 Register Address: 32h Bit # 7 6 5 4 3 2

Strany 109 - ABSOLUTE MAXIMUM RATINGS

DS26503 T1/E1/J1 BITS Element 86 of 123 Register Name: LIC4 Register Description: Line Interface Control 4 Register Address: 33h Bit # 7 6 5 4 3

Strany 110 - 110 of 123

DS26503 T1/E1/J1 BITS Element 87 of 123 Register Name: INFO1 Register Description: Information Register 1 Register Address: 11h Bit # 7 6 5 4 3 2

Strany 111 - 19.1 Multiplexed Bus

DS26503 T1/E1/J1 BITS Element 88 of 123 Register Name: SR1 Register Description: Status Register 1 Register Address: 14h Bit # 7 6 5 4 3 2 1 0 Na

Strany 112 - 112 of 123

DS26503 T1/E1/J1 BITS Element 89 of 123 Register Name: IMR1 Register Description: Interrupt Mask Register 1 Register Address: 15h Bit # 7 6 5 4 3

Strany 113 - 113 of 123

DS26503 T1/E1/J1 BITS Element 9 of 123 2. SPECIFICATIONS COMPLIANCE The DS26503 meets all applicable sections of the relevant latest telecommunicati

Strany 114 - 19.2 Nonmultiplexed Bus

DS26503 T1/E1/J1 BITS Element 90 of 123 13.8 Recommended Circuits Figure 13-4. Basic Interface TTIP TRING RTIP RRIN

Strany 115 - 5ns min/20ns max

DS26503 T1/E1/J1 BITS Element 91 of 123 Figure 13-5. Protected Interface Using Internal Receive Termination TTIP

Strany 116

DS26503 T1/E1/J1 BITS Element 92 of 123 13.9 Component Specifications Table 13-1. Transformer Specifications SPECIFICATION RECOMMENDED VALUE Turns

Strany 117 - 19.3 Serial Bus

DS26503 T1/E1/J1 BITS Element 93 of 123 Figure 13-6. E1 Transmit Pulse Template Figure 13-7. T1 Transmit Pulse Template 0-0.1-

Strany 118

DS26503 T1/E1/J1 BITS Element 94 of 123 Figure 13-8. Jitter Tolerance (T1 Mode) Figure 13-9. Jitter Tolerance (E1 Mode) UNIT

Strany 119 - 119 of 123

DS26503 T1/E1/J1 BITS Element 95 of 123 Figure 13-10. Jitter Attenuation (T1 Mode) Figure 13-11. Jitter Attenuation (E1 Mod

Strany 120 - 120 of 123

DS26503 T1/E1/J1 BITS Element 96 of 123 14. LOOPBACK CONFIGURATION Register Name: LBCR Register Description: Loopback Control Register Register Ad

Strany 121 - 121 of 123

DS26503 T1/E1/J1 BITS Element 97 of 123 15. 6312kHz SYNCHRONIZATION INTERFACE The DS26503 has a 6312kHz Synchronization Interface mode of operation

Strany 122 - 20. REVISION HISTORY

DS26503 T1/E1/J1 BITS Element 98 of 123 16. JTAG BOUNDARY SCAN ARCHITECTURE AND TEST ACCESS PORT The DS26503 supports the standard IEEE 1149.1 inst

Strany 123 - 21. PACKAGE INFORMATION

DS26503 T1/E1/J1 BITS Element 99 of 123 TAP Controller State Machine The TAP controller is a finite state machine that responds to the logic level a

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