LRIS64K datasheet(87/100 Pages) STMICROELECTRONICS

87 / 100 page

LRIS64K

Commands codes

Doc ID 15336 Rev 11

87/100

24.20

Fast Read Multiple Block

On receiving the Fast Read Multiple Block command, the LRIS64K reads the selected

blocks and sends back their value in multiples of 32 bits in the response. The blocks are

numbered from '00h to '7FFh' in the request and the value is minus one (–1) in the field. For

example, if the “number of blocks” field contains the value 06h, 7 blocks are read. The

maximum number of blocks is fixed to 32 assuming that they are all located in the same

sector. If the number of blocks overlaps sectors, the LRIS64K returns an error code.

The Protocol_extention_flag should be set to 1 for the LRIS64K to operate correctly. If the

Protocol_extention_flag is at 0, the LRIS64K answers with an error code.

The Option_flag is supported. The data rate of the response is multiplied by 2.

Request parameters:

●

Option_flag

●

UID (Optional)

●

First block number

●

Number of blocks

Response parameters:

●

Sector security status if Option_flag is set (see Table 87: Sector security status if

Option_flag is set)

●

N block of data

Table 85.

Fast Read Multiple Block request format

Request

SOF

Request_

flags

Fast

Read

Multiple

Block

IC Mfg

code

UID(1)

Gray means that the field is optional.

First

block

number

Number

blocks

CRC16

Request

EOF

8 bits

C3h

02h

64 bits

16 bits

8 bits

16 bits

Table 86.

Fast Read Multiple Block response format when Error_flag is NOT set

Response

SOF

Response_

flags

Sector

security

status(1)

Gray means that the field is optional.

Data

CRC16

Response

EOF

8 bits

8 bits(2)

Repeated as needed.

32 bits(2)

16 bits

Table 87.

Sector security status if Option_flag is set

Reserved for future use.

All at 0

password

control bits

Read / Write

protection bits

0: Current sector not locked

1: Current sector locked

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