SRIX4K datasheet(36/47 Pages) STMICROELECTRONICS

36 / 47 page

SRIX4K commands

SRIX4K

36/47

9.8

Write_block (Addr, Data) command

Command code = 09h

On receiving the Write_block command, the SRIX4K writes the 4 bytes contained in the

command to the addressed block, provided that the block is available and not write-

protected. Data bytes are transmitted with the least significant byte first, and each byte is

transmitted with the least significant bit first.

The address byte gives access to the 128 blocks of the SRIX4K (addresses 0 to 127).

Write_block commands issued with a block address above 127 will not be interpreted and

the SRIX4K will not return any response, except for the System area located at address

255.

The result of the Write_block command is submitted to the addressed block. See the

following Figures for a complete description of the Write_block command:

●

Figure 13: Resettable OTP area (addresses 0 to 4).

●

Figure 16: Binary counter (addresses 5 to 6).

●

Figure 18: EEPROM (addresses 7 to 127).

The Write_block command does not give rise to a response from the SRIX4K. The reader

must check after the programming time, tW, that the data was correctly programmed. The

SRIX4K must have received a Select() command and be switched to Selected state before

any Write_block command can be accepted. All Write_block commands sent to the SRIX4K

before a Select() command is issued, are ignored.

Figure 45.

Write_block request format

Request parameters:

●

Address: block addresses from 0 to 127, or 255

●

Data 1: Less significant data byte

●

Data 2: Data byte

●

Data 3: Data byte

●

Data 4: Most significant data byte.

Figure 46.

Write_block response format

SOF

Data 1

CRCL

CRCH

EOF

AI07687b

8 bits

Data 2

Data 3

Data 4

8 bIts

Write_block

Address

09h

8 bIts

AI07680

No Response

SRIX4K датащи(PDF) 36 Page - STMicroelectronics

SRIX4K датащи(HTML) 36 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47

датащи скачать

ссылки URL