AT34C02C-TH-T View Datasheet(PDF) - Atmel Corporation

Part Name

Description

MFG CO.

AT34C02C-TH-T

Two-wire Serial EEPROM with Permanent and Reversible Software Write Protect

Atmel Corporation 

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AT34C02C

PERMANENT WRITE PROTECT REGISTER (PSWP) STATUS: To find out if the register has

been programmed, the same procedure is used as to program the register except that the

R/W bit is set to 1. If the device sends an acknowledge, then the permanent write protect

register has not been programmed. Otherwise, it has been programmed and the device is

permanently write protected at the first half of the array.

Table 8-1. PSWP Status

Pin

Command

A2 A1 A0

Read PSWP A2 A1 A0

Preamble

RW

B7 B6 B5 B4 B3 B2 B1 B0

0

1

1

0 A2 A1 A0 1

REVERSIBLE WRITE PROTECT REGISTER(RSWP) STATUS: To find out if the register has

been programmed, the same procedure is used as to program the register except that the

R/W bit is set to 1. If the sends an device acknowledge, then the reversible write protect

register has not been programmed. Otherwise, it has been programmed and the device is

write protected (reversible) at the first half of the array.

Figure 8-1. Device Address

Figure 8-2. Byte Write

Figure 1. Page Write

13

5185D–SEEPR–1/08

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