AT88SC0404C-PI Atmel, AT88SC0404C-PI Datasheet - Page 34

• Manufacturer Part Number: AT88SC0404C-PI
• Manufacturer: Atmel

Specifications of AT88SC0404C-PI

• Operating Temperature (max): 85C
• Operating Temperature (min): -40C
• Package Type: PDIP
• Mounting: Through Hole
• Pin Count: 8
• Operating Temperature Classification: Industrial
• Lead Free Status / RoHS Status: Not Compliant

7.6.3. System WRITE: $B4
5211C–SMIC–01/10
Atmel AT88SC0104/0204/0404/0808/1616/3216/6416/12816/25616C
Functional
Figure 16. System WRITE Command Functional Description
The System WRITE command allows writing of system data to the device. Depending on the value of the Address 1
parameter, the host may write data in the configuration memory, program the fuses, or set the user zone.
Table 27. System WRITE Command Detail
Write Config Zone
The maximum number of bytes that may be written is as follows;
• $10 for Atmel
• $40 for Atmel AT88SC3216C and Atmel AT88SC6416C (EEPROM page size of 64-bytes)
• $80 for Atmel AT88SC12816C and Atmel AT88SC25616C (EEPROM page size of 128-bytes)
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 data. 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.
N data bytes
Write Config Zone Atmel AT88SC0104C-AT88SC1616C)
Write Config Zone Atmel AT88SC3216C-AT88SC6416C)
Write Config Zone Atmel AT88SC12816C-AT88SC25616C)
Write Fuses
Send Checksum
Set User Zone
®
AT88SC0104C through Atmel AT88SC1616C (EEPROM page size of 16-bytes)
Command Description
Number of bytes N
Command
Address 1
Address 2
Host
Data
Data
…
Device
Command Addr 1
$B4
$B4
$B4
$B4
$B4
$B4
$00
$00
$00
$01
$02
$03
Addr 2
fuse ID
zone
addr
addr
addr
$00
N ≤ $10
N ≤ $40
N ≤ $80
$00
$02
$00
N
Data (N)
N-bytes
N-bytes
N-bytes
2-bytes
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