September 2001
S6350 Reader Reference Guide
34
ISO Write Single Block: Command Code (21
hex
)
ISO Write Single Block Request Command Packet
ISO Command Data
Header
Packet
Length
Node
Address
Cmd
Flag
Cmd
Config.
Byte
Data
Check-
sum
‘01
hex
’
2 bytes
2 bytes
1
byte
‘60
hex
’
Byte 0
bytes
1 - n
2 bytes
ISO Request Format
SOF
*Flags
Write
Single
Block
UID
Block
number
CRC16
EOF
Not
Used
1 byte
‘21
hex
’
8 bytes
1 byte
Not
Used
Not
Used
ISO Write Single Block Response Packet
ISO Response Data
Header
Packet
Length
Node
Address
Response
Flags
Command
Data
Check
sum
‘01
hex
’
2 bytes
2 bytes
1 byte
‘60
hex
’
bytes
1 - m
2 bytes
Response when Error_flag is set
SOF
Flags
Error Code
CRC16
EOF
Not
Used
1 byte
1 byte
Not
Used
Not
Used
OR
Response when Error_flag is not set
SOF
Flags
CRC16
EOF
Not
Used
1 byte
Not
Used
Not
Used
Note:
*
Bit 7
of the ISO 15693 protocol
Option_Flag
must be set to
1
for
all
Write
and
Lock
commands to respond properly.
