User's Manual

PIN Pad 791 Programmer’s Manual (PCI POS-A) UDN PM0103-U Rev. 06
Section 11 – ICC / SAM / Magnetic stripe card manipulating messages 2015-04-20
Page289
Uniform Industrial Corp. Proprietary and Confidential Total 342 pages
Message QD Contactless Card Data with/without Start/End sentinels
Format: <STX>QD[flag]<ETX>[LRC]
Message length: Fixed 6 bytes.
Usage: The default value for PIN pad is to ignore the start/end sentinels and then return the
contactless card data. User can apply this message to make PIN pad return the
contactless card data with start/end sentinels.
Message element:
Request fame (HOST to PP791)
Field Length Value and description
<STX> 1 <02>
QD 2 Message ID
. 1 <2E>
[flag] 1 ‘0’: Without Start/End sentinels
‘1’: With Start/End sentinels
<ETX> 1 <03>
[LRC] 1 Checksum
Response fame (PP791 to HOST)
Field Length Value and description
<STX> 1 <02>
QD 2 Message ID
[status] 1 ‘0’: Without Start/End sentinels
‘1’: With Start/End sentinels
<ETX> 1 <03>
[LRC] 1 Checksum
Message flow:
HOST Direction PIN pad
Message QD


<ACK> (Good LRC)
<NAK> (Bad LRC)
<EOT> (after 3 NAKs)

Message QD (response)
<ACK> / <NAK> / <EOT>
