AT88SC0104C datasheet(31/58 Pages) ATMEL

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5210B–SMIC–11/08

AT88SC0104/0204/0404/0808/1616/3216/6416/12816/25616C

7.6.1

Write User Zone: $B0

7.6.1.1

Functional

Figure 7-3.

Write User Zone Command Functional Description

The Write User Zone command $B0 allows writing of data in the device's currently selected user

zone (the procedure for selecting a user zone is described below, see Section 7.6.3 on page

30).

The data byte address to be written is defined by Address 1 and Address 2 in the command.

The value N defines how many bytes are to be written. The maximum number of bytes that may

be written is as follows;

• $10 for AT88SC0104C through AT88SC1616C (EEPROM page size of 16 bytes)

• $40 for AT88SC3216C and AT88SC6416C (EEPROM page size of 64 bytes)

• $80 for AT88SC12816C and AT88SC25616C (EEPROM page size of 128 bytes)

In anti-tearing mode the maximum value for N is $08 for all devices. A write in anti-tearing mode

is activated with the Set User Zone with Anti-Tearing command, all subsequent writes to the

user zone will be in anti-tearing mode. A write may be started in the middle of an EEPROM

page but should not extend past the end of the page.

If the host is not allowed to write in the zone, the device will not acknowledge the N byte. After

this command the host must perform ACK polling.

Device

Command

Address 1

Address 2

Number of Bytes N

Data

...

Data

Host

N data bytes

Command

Address 1

Address 2

Data

Data x N

1011 0000

xxxx xxxx

d7--- ---d0

AT88SC0104C Datasheet(PDF) 31 Page - ATMEL Corporation