AT88SC0104CA_11 ATMEL [ATMEL Corporation], AT88SC0104CA_11 Datasheet - Page 30

• Manufacturer Part Number: AT88SC0104CA_11
• Description: Atmel CryptoMemory Specification Datasheet
• Manufacturer: ATMEL [ATMEL Corporation]

8.5
8.6
The following table lists the specific requirements for ACK polling and the maximum expected delay before the device will ACK
indicating readiness for the next command.
Table 8-2.
Note:
Device Addressing
The first nibble of the command byte corresponds to the device address. All CryptoMemory devices will respond to the device
address $B. A specific device may be set to respond to another value ($0 to $F) in addition to $B by setting this value in the
second nibble of the Device Configuration Register (DCR) in the configuration memory. The DCR is set to $FF at the Atmel
factory and thus will respond to device address $B and $F unless the DCR is modified. For a device to respond only to $B the
DCR should be set to $B also.
TWI Command Descriptions
In the following section operations are described in two parts: the instruction is described first from a functional point of view
(parameters and data exchanged), after which they are detailed for the synchronous two-wire protocol. In these diagrams,
values are shown in binary format with bits to the left transmitted first, i.e. bytes are transmitted most significant bit first.
Command Description
Write User
Zone
Random Read
Read User
Zone
System Write
System Read
Verify Crypto
Verify
Password
Minimum Delay for ACK Polling for each Command
Delays are based on operation at 25° C
Normal
Normal with Anti-tearing
Encrypted
Encrypted with Anti-tearing
Write Config Zone
Write Fuses
Send Checksum
Send Checksum with Anti-tearing
Set User Zone
Write Config Zone with Anti-tearing
Set User Zone with Anti-tearing
Read Config Zone
Read Fuse Byte
Read Checksum
Verify Authentication
Verify Encryption
Write Password
Read Password
Atmel AT88SC0104CA/0204CA/0404CA/0808CA [Datasheet]
Command
$BA
$BA
$B0
$B0
$B0
$B0
$B1
$B2
$B4
$B4
$B4
$B4
$B4
$B4
$B4
$B6
$B6
$B6
$B8
$B8
Addr
addr
addr
addr
addr
addr
$0B
$0X
$1X
$0X
$1X
N/A
$00
$01
$02
$02
$03
$08
$00
$01
$02
1
Addr
zone
zone
addr
addr
addr
addr
addr
addr
addr
addr
fuse
N/A
$00
$00
$00
$00
$00
$00
$00
$00
ID
2
N/A
$00
$02
$02
$00
$00
$01
$02
$10
$10
$03
$03
N
N
N
N
N
N
N
N
N
ACK Polling CMD
Required, any CMD
Required, any CMD
No, Send Checksum
No, Send Checksum
Not Required
Not Required
Required, any CMD
Required, any CMD
Required, any CMD
Required, any CMD
Not Required
Required, any CMD
Not Required
Not Required
Not Required
Note Required
Required; B2 or B6 only
Required; B2 or B6 only
Required; B2 or B6 only
Required; B2 or B6 only
8664E−CRYPTO−12/11
Delay
5ms
20ms
0
0
0
5ms
5ms
5ms
20ms
0
20ms
0
0
0
0
10ms
10ms
10ms
10ms
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