AT88SC0104CA-MJTG Atmel, AT88SC0104CA-MJTG Datasheet - Page 49
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AT88SC0104CA-MJTG
Manufacturer Part Number
AT88SC0104CA-MJTG
Description
CRYPTOMEM 1KBIT 4 ZONE MOD J TWI
Manufacturer
Atmel
Series
CryptoMemory®r
Specifications of AT88SC0104CA-MJTG
Format - Memory
EEPROMs - Serial
Memory Type
EEPROM
Memory Size
1K (128 x 8)
Speed
4MHz
Interface
I²C, 2-Wire Serial
Voltage - Supply
2.7 V ~ 3.6 V
Operating Temperature
0°C ~ 70°C
Package / Case
M2 J, Smart Card Module
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
10.7. System WRITE: $B4
10.7.1. Functional
48
Figure 32. System WRITE Command Functional Description
The System WRITE command allows writing of system data to the device. Depending on the value of the P1
parameter, the host may write data in the configuration memory, program the fuses, send a checksum or set the user
zone.
Table 29. System WRITE Command Detail
The anti-tearing function is controlled by P1: the host may choose to write in the configuration zone with anti-tearing
enabled by setting P1 = $08 instead of $00. Similarly, the host may choose to activate anti-tearing for a user zone by
carrying out the Set User Zone command with P1 = $0B instead of $03. All subsequent Write User Zone commands
are then carried out with anti-tearing enabled until the next Set User Zone command. Anti-tearing should be turned off if
not required, as it would otherwise cause more write cycles than necessary.
Table 30. Anti-Tearing
Atmel AT88SC0104/0204/0404/0808/CA
N data bytes
Write Config Zone
Write Fuses
Send Checksum
Set User Zone
Write Config Zone w/ a-t
Set User Zone w/ a-t
Command
Command Description
Number of bytes N
Address P1
Address P2
Command
Host
Data
Data
…
CLA
$00
$00
$00
$00
Device
INS
$B4
$B4
$B4
$B4
CLA
$00
$00
$00
$01
$02
$03
$B4
$B4
INS
P1
$0B
$08
P1
fuse ID
zone
addr
$00
P2
zone
addr
P2
N ≤ $10
$00
$02
$00
P3
N ≤ $08
$00
P3
8664C–CRYPT–01/10
Data(N)
N-bytes
2-bytes
Data(N)
N-bytes