Rainbow-electronics ATmega161L Uživatelský manuál stáhnout pdf (Strana 134)

134

ATmega161(L)

1228C–AVR–08/02

Table 53. External Data Memory Characteristics, 4.0 - 5.5 Volts, SRWn1 = 1, SRWn0 = 0

Symbol Parameter

8 MHz Oscillator Variable Oscillator

UnitMin Max Min Max

01/t

CLCL

Oscillator Frequency 0.0 8.0 MHz

10 t

RLDV

Read Low to Data Valid 310 3.0t

CLCL

-65 ns

12 t

RLRH

RD Pulse Width 355 3.0t

CLCL

-20 ns

15 t

DVWH

Data Valid to WR High 345 3.0t

CLCL

-30 ns

16 t

WLWH

WR Pulse Width 35 3.0t

CLCL

-20 ns

Table 54. External Data Memory Characteristics, 4.0 - 5.5 Volts, SRWn1 = 1, SRWn0 = 1

Symbol Parameter

8 MHz Oscillator Variable Oscillator

UnitMin Max Min Max

01/t

CLCL

Oscillator Frequency 0.0 8.0 MHz

10 t

RLDV

Read Low to Data Valid 310 3.0t

CLCL

-65 ns

12 t

RLRH

RD Pulse Width 355 3.0t

CLCL

-20 ns

14 t

WHDX

Data Hold After WR High 152.5 1.5t

CLCL

-35 ns

15 t

DVWH

Data Valid to WR High 345 3.0t

CLCL

-30 ns

16 t

WLWH

WR Pulse Width 355 3.0t

CLCL

-20 ns

Table 55. External Data Memory Characteristics, 2.7 - 5.5 Volts, No Wait State

Symbol Parameter

4 MHz Oscillator Variable Oscillator

UnitMin Max Min Max

01/t

CLCL

Oscillator Frequency 0.0 4.0 MHz

LHLL

ALE Pulse Width 195 t

CLCL

-55 ns

AVL L

Address Valid A to ALE Low 60 0.5t

CLCL

-65 ns

3a t

LLAX_ST

Address Hold After ALE Low,

write access

10 10 ns

3b t

LLAX_LD

Address Hold after ALE Low,

read access

15 15 ns

AVL LC

Address Valid C to ALE Low 60 0.5t

CLCL

-65 ns

AVR L

Address Valid to RD Low 200 1.0t

CLCL

-50 ns

AVW L

Address Valid to WR Low 200 1.0t

CLCL

-50 ns

LLWL

ALE Low to WR Low 105 145 0.5t

CLCL

-20 0.5t

CLCL

+20 ns

LLRL

ALE Low to RD Low 105 145 0.5t

CLCL

-20 0.5t

CLCL

+20 ns

DVRH

DataSetuptoRDHigh 95 95 ns

10 t

RLDV

Read Low to Data Valid 165 165 ns

11 t

RHDX

Data Hold After RD High 0 0 ns

1 2 ... 129 130 131 132 133 134 135 136 137 138 139 ... 158 159

Komentáře k této Příručce

Žádné komentáře

Rainbow-electronics ATmega161L Uživatelský manuál Strana 134

Komentáře k této Příručce

Související produkty a manuály pro Senzory Rainbow-electronics ATmega161L