AT21CS01 datasheet(35/47 Pages) MICROCHIP

Part #	AT21CS01

Description	Single-Wire, I/O Powered 1-Kbit (128 x 8) Serial EEPROM with a Unique, Factory-Programmed 64-Bit Serial Number

PDF	47 Pages

Scroll/Zoom	100%

Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

Logo

35 / 47 page

opcode of 1010b (Ah), the appropriate slave address combination, and the Read/Write bit set as a

logic ‘0’. Since a memory address has not been input at this point in the sequence, the device returns an

ACK. Next, the 8

‑bit word address is sent which will result in an ACK from the device, regardless if that

address is in a memory zone that has been set to ROM. However, upon sending the data input byte, a

Write command to an address that was in a memory zone that was set to ROM will result in a NACK

response from the AT21CS01/11 and the device will be immediately ready to accept a new command. If

the address being written was in a memory zone that had not been set to ROM, the device will return an

ACK to the data input byte as per normal operation for write operations as described in Write Operations.

AT21CS01/AT21CS11

Datasheet

DS20005857A-page 35

AT21CS01 Datasheet(PDF) 35 Page - Microchip Technology