Rainbow-electronics DS1680 Uživatelský manuál stáhnout pdf (Strana 6)

DS1680

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ADDRESS/COMMAND BYTE

Figure 4 shows the command byte for the DS1680. Each data transfer is initiated by a command byte.

Bits 0–6 specify the address of the registers to be accessed. The MSB (bit 7) is the read/write bit. This bit

specifies whether the accessed byte will be read or written. A read operation is selected if bit 7 is a zero

and a write operation is selected if bit 7 is a one. The address map for the DS1680 is shown in Figure 5.

ADDRESS/COMMAND BYTE Figure 4

7 6 5 4 3 2 1 0

A6 A5 A4 A3 A2 A1 A0

RTC/WATCHDOG ADDRESS MAP Figure 5

BIT7

BIT0

00 0 10 SECONDS SECONDS

01 0 10 MINUTES MINUTES

10 HR

A/P

10 HR HOURS

03 0 0 0 0 0 DAY

04 0 0 10 DATE DATE

05 0 0 0 10 MO.

MONTH

06 10 YEAR YEAR

07 M 10 SEC ALARM SECONDS ALARM

08 M 10 MIN ALARM MINUTES ALARM

10 HR

A/P

10 HR HOUR ALARM

0A M 0 0 0 0 DAY ALARM

0B CONTROL REGISTER

0C STATUS REGISTER

0D WATCHDOG REGISTER

RESERVED

1 2 3 4 5 6 7 8 9 10 11 ... 22 23

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Rainbow-electronics DS1680 Uživatelský manuál Strana 6