SR176A5T1GE STMicroelectronics, SR176A5T1GE Datasheet - Page 20

• Manufacturer Part Number: SR176A5T1GE
• Manufacturer: STMicroelectronics

Specifications of SR176A5T1GE

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

Device operations (instructions)
5.6
20/35
WRITE_BLOCK
Command Code = 09h,(X.AD)
Prior to any WRITE_BLOCK command, the SR176 must have been set into the SELECTED
state.
When executing the WRITE_BLOCK command, the SR176 overwrites the contents of the
addressed block with the 16-bit value that was sent in the command, provided that the block
is available and not write protected. The AD value of the four least significant bits of the
address code (X.AD) (b
specifies that the data should be written in block 6. The SR176 does not generate any
response when it executes a WRITE_BLOCK command
after the programming time, t
Block addresses between 0 to 3 cannot be accessed using the WRITE_BLOCK command
(the command has no effect on these blocks). Write access to block 15 is described in the
section on the PROTECT_BLOCK command.
Request parameters
Figure 29. WRITE_BLOCK request format
Figure 30. WRITE_BLOCK frame exchange between Reader and SR176
Reader
SR176
ADDRESS: address block from 4 to 14
DATA
DATA
SOF
L
H
WRITE_BLOCK
: least significant Byte
: most significant Byte
SOF
09h
09h
(Figure
3
+ 4-bit address
to b
ADDR
ADDRESS
4 zero-bits
29):
W
0
) represents the block address. For example, address 06h
, that the data bits were correctly programmed.
DATA L
DATA L
DATA H
8 bIts
CRC L CRC H EOF
DATA H
8 bIts
(Figure
CRC L
8 bIts
30). The reader must check
CRC H
8 bIts
No Response
AI07709B
EOF
AI07710B
SR176