at88sc0104c ATMEL Corporation, at88sc0104c Datasheet - Page 31

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

Table 7-2.
Note:
7.5
7.6
5210A–SMIC–04/07
Write User Zone
Read User Zone
System Write
System Read
Verify Password
Delays are based on operation at 25° C. See
Device Addressing
Command Descriptions
Command Description
Minimum Delay for ACK Polling for each Command
Normal
Normal with Anti-Tearing
Encrypted
Encrypted with Anti-Tearing
Write Config Zone
Write Fuses
Set User Zone
Write Config Zone with Anti-
Tearing
Set User Zone with Anti-
Tearing
Read Config Zone
Read Fuse Byte
Write Password
Read Password
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.
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.
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.
• Write Commands: ACK polling required except encrypted write commands. Any command
• Set commands: No ACK polling required.
• Verify commands: ACK polling required with B2 or B6 commands only.
may be used.
AT88SC0104/0204/0404/0808/1616/3216/6416/12816/25616C
Table 10-1 on page 52
Command
$BA
$BA
$B0
$B0
$B0
$B0
$B2
$B4
$B4
$B4
$B4
$B4
$B6
$B6
Addr 1
addr
addr
addr
addr
addr
$0B
$0X
$1X
$00
$01
$03
$08
$00
$01
Addr 2
fuse ID
zone
zone
addr
addr
addr
addr
addr
addr
addr
addr
$00
$00
$00
$00
$00
$00
$01
$01
$03
N
N
N
N
N
N
N
N
N
Required, any CMD
Required, any CMD
No, Send Checksum
Required, any CMD
Required, any CMD
Required, any CMD
Not Required
Required; B2 or B6 only
ACK Polling CMD
No, Send Checksum
Not Required
Not Required
Not Required
Not Required
Required; B2 or B6 only
Delay
20ms
20ms
10ms
10ms
5ms
5ms
5ms
0
0
0
0
0
0
0
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