at88sc0104c ATMEL Corporation, at88sc0104c Datasheet - Page 32

• Manufacturer Part Number: at88sc0104c
• Description: Cryptomemory Specification For Standard Mode Of Operation
• Manufacturer: ATMEL Corporation

7.6.1
7.6.1.1
Figure 7-3.
28
AT88SC0104/0204/0404/0808/1616/3216/6416/12816/25616C
Write User Zone: $B0
Functional
Write User Zone Command Functional Description
N data bytes
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
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;
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.
Figure 7-4.
• $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)
R
S
T
A
T
Command
1011 0000
Write User Zone
Number of Bytes N
A
C
K
Address 1
Command
Address 1
Address 2
xxxx xxxx
Host
Data
Data
...
A
C
K
Address 2
xxxx xxxx
C
A
K
xxxx xxxx
N
Device
A
C
K
d7--- ---d0
Data
“System Write : $B4”
A
C
K
Data x N
d7--- ---d0
5210A–SMIC–04/07
A
C
K
).
O
S
P
T