SRI4K-A3T/1GE STMicroelectronics, SRI4K-A3T/1GE Datasheet - Page 27

• Manufacturer Part Number: SRI4K-A3T/1GE
• Manufacturer: STMicroelectronics

Specifications of SRI4K-A3T/1GE

• Operating Temperature (max): 85C
• Operating Temperature Classification: Commercial
• Lead Free Status / Rohs Status: Compliant

READ_BLOCK(Addr) Command
Command Code = 08h
On receiving the READ_BLOCK command, the
SRI4K reads the desired block and returns the 4
data Bytes contained in the block. 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 SRI4K (addresses 0 to 127). READ_BLOCK
Figure 43. READ_BLOCK Request Format
Request parameter:
–
Figure 44. READ_BLOCK Response Format
Response parameters:
Figure 45. READ_BLOCK Frame Exchange Between Reader and SRI4K
Reader
SRI4K
ADDRESS: block addresses from 0 to 127, or
255
SOF
SOF
SOF
08h
ADDR
READ_BLOCK
DATA 1
8 bIts
08h
CRC L CRC H EOF
DATA 2
8 bIts
ADDRESS
8 bIts
<-t 0 -> <-t 1 ->
DATA 3
8 bIts
commands issued with a block address above 127
will not be interpreted and the SRI4K will not return
any response, except for the System area located
at address 255.
The SRI4K must have received a SELECT() com-
mand and be switched to SELECTED state before
any READ_BLOCK() command can be accepted.
All READ_BLOCK() commands sent to the SRI4K
before a SELECT() command is issued are ig-
nored.
–
–
–
–
8 bits
SOF DATA
CRC L
DATA 1: Less significant data Byte
DATA 2: Data Byte
DATA 3: Data Byte
DATA 4: Most significant data Byte
DATA 4
8 bIts
1
DATA
2
CRC H
8 bits
DATA
CRC L
8 bits
3
DATA
4
EOF
CRC L CRC H EOF
CRC H
8 bIts
EOF
AI10890
AI07684
SRI4K
AI07685
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