AT88SC0104C datasheet(28/58 Pages) ATMEL

28 / 58 page

5210B–SMIC–11/08

AT88SC0104/0204/0404/0808/1616/3216/6416/12816/25616C

7.3

Command Format

Most CryptoMemory commands have the same format as a two wire interface (TWI) write com-

mand. The TWI write command is characterized by a zero in the LSB of the first byte (device

address). The number of word address bytes in a TWI write command will vary depending on

the size of the memory being addressed. All bytes whether part of the command or data are

generated by the host and sent to the memory device that will acknowledge each byte.

Table 7-1.

CryptoMemory Synchronous Command Set

Command Description

Command

Addr 1

Addr 2

Data (N)

Write User

Zone

Normal

(AT88SC0104C-AT88SC1616C)

$B0

addr

≤$10

N bytes

Normal

(AT88SC3216C, AT88SC6416C)

$B0

addr

≤$40

N bytes

Normal

(AT88SC12816C, AT88SC25616C)

$B0

addr

≤$80

N bytes

with Anti-Tearing (all devices)

$B0

addr

≤08

N bytes

Read User

Zone

$B2

addr

System Write

Write Config Zone

(AT88SC0104C-AT88SC1616C)

$B4

$00

addr

≤$10

N bytes

Write Config Zone

(AT88SC3216C, AT88SC6416C)

$B4

$00

addr

≤$40

N bytes

Write Config Zone

(AT88SC12816C, AT88SC25616C)

$B4

$00

addr

≤$80

N bytes

Write Fuses

$B4

$01

fuse ID

$00

Set User Zone

$B4

$03

zone

$00

Write Config Zone with Anti-Tearing

$B4

$08

addr

≤$08

N bytes

Set User Zone with Anti-Tearing

$B4

$0B

zone

$00

System Read

Read Config Zone

$B6

$00

addr

Read Fuse Byte

$B6

$01

$00

$01

Verify

Password

Write Password

$BA

$0X

$00

$03

3 byte password

X=password set (0-7)

Read Password

$BA

$1X

$00

$03

3 byte password

X=password set (0-7)

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