Document Version 1.0
Last revised on
2018-‐10-‐22
Page 61 of 79
Reference Manual for uTrust 5501 F Reader/Writer Module
6.3.4.10.
CNTLESS_CONTROL_RETRIES
This escape command is used to enable/disable CRC/PROTOCOL/TIMEOUT error retries which are
enabled by default for contactless cards.
Input:
The first byte of input buffer contains the escape code.
The second byte either sets the mode or contains a code to retrieve the setting.
Input
Output
Byte0
Byte1-‐ Description
Byte 0
Escape
code(0xA7)
0x00 Enable RNAK retries
No Output
0x01 Disable RNAK retries
No Output
0xFF
Get current state of retries
0x00 -‐ Retries are enabled
0x01 -‐ Retries are disabled
Output
:
No response is returned for set state. For get state, 1 byte response is received.
Output buffer
NULL or current state
6.3.4.11.
CNTLESS_CONTROL_POLLING
This escape command is used to enable/disable firmware polling for contactless cards.
Input:
The first byte of input buffer contains the escape code.
The second byte either sets the mode or contains a code to retrieve the setting.
Input
Output
Byte0
Byte1 -‐ Description
Byte 0
Escape
code(0xAC)
0x00
Enable polling
No output
0x01
Disable polling
No output
0XFF
Get current state of
polling
0x00 – Polling enabled
0x01 – Polling disabled
Output
:
No response is returned for set state. For get state, 1 byte response is received.
Output buffer
NULL or current state
