User's Manual

PIN Pad 791 Programmer’s Manual (PCI POS-A) UDN PM0103-U Rev. 06
Section 8 – MIFARE card messages 2015-04-20
Page181
Uniform Industrial Corp. Proprietary and Confidential Total 342 pages
Response frame (PIN pad to HOST)
Field Length Value and description
<STX> 1 <02>
P13 3 Message ID
[Result] 1 ‘0’: Success.
‘1’: Fail.
[Reason] 1 Optional: if [Result] = ‘1’
‘1’: Format error.
‘2’: Sequence error.
‘3’: Write sector fail.
<ETX> 1 <03>
[LRC] 1 Checksum
Message flow:
HOST Direction PIN pad
Message P13 (request
frame)


<ACK> (Good LRC)
<NAK> (Bad LRC)
<EOT> (after 3 NAKs)

Message P13 (response
frame)
<ACK> (Good LRC)
<NAK> (Bad LRC)
<EOT> (after 3 NAKs)
