SRT512-W4/1GE STMicroelectronics, SRT512-W4/1GE Datasheet - Page 34

• Manufacturer Part Number: SRT512-W4/1GE
• Manufacturer: STMicroelectronics

Specifications of SRT512-W4/1GE

• Operating Temperature (max): 85C
• Mounting: Surface Mount
• Operating Temperature Classification: Commercial
• Lead Free Status / RoHS Status: Supplier Unconfirmed

SRT512 commands
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Read_block(Addr) command
Command code = 08h
On receiving the Read_block command, the SRT512 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 16 blocks of the SRT512 (addresses 0 to 15).
Read_block commands issued with a block address above 15 will not be interpreted and the
SRT512 will not return any response, except for the System area located at address 255.
The SRT512 must have received a Select() command and be switched to Selected state
before any Read_block() command can be accepted. All Read_block() commands sent to
the SRT512 before a Select() command is issued are ignored.
Figure 40. Read_block request format
Request parameter:
●
Figure 41. Read_block response format
Response parameters:
●
●
●
●
Figure 42. Read_block frame exchange between reader and SRT512
Reader
SRT512
SOF
Address: block addresses from 0 to 15, or 255
Data 1: Less significant data byte
Data 2: Data byte
Data 3: Data byte
Data 4: Most significant data byte
SOF
SOF 08h
Data 1
8 bIts
Read_block
Address
08h
CRC L CRC H EOF
Data 2
8 bIts
Doc ID 13277 Rev 4
Address
8 bIts
8 bIts
Data 3
<-t 0 -> <-t 1 ->
8 bIts
Data 4
8 bits
SOF Data 1
CRC L
Data 2 Data 3 Data 4
CRC L
8 bits
CRC H
8 bits
CRC H
8 bIts
CRC L CRC H EOF
EOF
SRT512
EOF
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