at88sc0104c ATMEL Corporation, at88sc0104c Datasheet - Page 34

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

7.6.3
7.6.3.1
Figure 7-7.
7.6.3.2
30
AT88SC0104/0204/0404/0808/1616/3216/6416/12816/25616C
System Write : $B4
Functional
Write Config Zone
System Write Command Functional Description
N data bytes
The System Write command allows to writing of configuration data to the device. Depending on
the value of the Address 1 parameter, the host may write data in the configuration memory, pro-
gram the fuses, or set the user zone.
Table 7-3.
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 may be started in
the middle of an EEPROM page but should not extend past the end of the page. If the address
provided is an unauthorized address, the device will not write the requested data. Since access
rights vary throughout the configuration memory, the host may provide an authorized starting
address, but a number of bytes that causes the device to reach unauthorized address. In this
case, the device will prevent the internal write cycle and no bytes will be written in the EEPROM.
After this command the host must perform ACK polling.
Command Description
Write Config Zone
AT88SC0104C-AT88SC1616C)
Write Config Zone
AT88SC3216C-AT88SC6416C)
Write Config Zone
AT88SC12816C-AT88SC25616C)
Write Fuses
Set User Zone
• $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)
System Write Command Detail
Number of Bytes N
Command
Address 1
Address 2
Host
Data
Data
...
Command
$B4
$B4
$B4
$B4
$B4
Addr 1
$03
$00
$00
$00
$01
Device
Addr 2
fuse ID
zone
addr
addr
addr
N ≤ $10
N ≤ $40
N ≤ $80
$00
$00
N
5210A–SMIC–04/07
Data (N)
N bytes
N bytes
N bytes