13

5185D–SEEPR–1/08

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

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

Pin

Preamble

RW

Command

A2

A1

A0

B7

B6

B5

B4

B3

B2

B1

B0

Read PSWP

A2

A1

A0

0

1

1

0

A2

A1

A0

1