Rainbow Electronics DS1624 User Manual

Page 12

DS1624

12 of 16

BUS MASTER

MODE

DS1624

MODE

DATA (MSB

FIRST)

COMMENTS

NOTES

DS1624 sends the second byte of data.

ACK

Bus Master generates acknowledge bit.

DS1624 sends the n-th byte of data.

NACK

Bus Master send “NO KWOWLEDGE”
bit.

STOP

Bus Master initiates the STOP condition.

NOTES:

1. If this protocol follows a write and the DS1624 does not acknowledge here, restart the protocol at the

Start here. If it does acknowledge, continue on.

2. Wait for write to complete (10 ms typ. 50 ms max). If DS1624 does not acknowledge the command

protocol immediately following a configure register or write mem protocol, the DS1624 has not
finished writing. Restart the new command protocol until the DS1624 acknowledges.

3. If n is greater than eight, the last eight bytes are the only bytes saved in memory. If the starting

address is 00 and the incoming data is 00 11 22 33 44 55 66 77 88 99, the result will be mem00=88
mem01=99 mem02=22 mem03=33 mem04=44 mem05=55 mem06=66 mem07=77. The data wraps
around and overwrites itself.

4. The STOP condition causes the DS1624 to initiate the write to EEPROM sequence. If a START

condition comes instead of the STOP condition, the write is aborted. The data is not saved.

5. For reading, the address is incremented. If the starting address is 04h and 30 bytes of data are read

out, 21h is the final address read.

ABSOLUTE MAXIMUM RATINGS*

Voltage on Any Pin Relative to Ground

–0.5V to +7.0V

Operating Temperature

–55

C to +125

Storage Temperature

–55

C to +125

Soldering Temperature

260

C for 10 seconds

* This is a stress rating only and functional operation of the device at these or any other conditions above

those indicated in the operation sections of this spe cification is not implied. Exposure to absolute
maximum rating conditions for extended periods of time may affect reliability.