User's Manual

PIN Pad 791 Programmer’s Manual (PCI POS-A) UDN PM0103-U Rev. 06
Section 13 – JPEG File Operation messages 2015-04-20
Page311
Uniform Industrial Corp. Proprietary and Confidential Total 342 pages
Message flow:
HOST Direction PIN Pad
Message J5
([control] = '0')


<ACK> (Good LRC)
<NAK> (Bad LRC)
<EOT> (after 3 NAKs)

Message J5
([PktType] = '0' and [SeqNo] = '000')
<ACK> / <NAK> / <EOT>

Message J5
([control] = '1')


<ACK> / <NAK> / <EOT>

Message J5
([PktType] = '0' and [SeqNo] = '001'-'998')
<ACK> / <NAK> / <EOT>
………………… …….. …………………………………..
Message J5
([control] = '1')


<ACK> / <NAK> / <EOT>

Message J5
([PktType] = '1')
<ACK> / <NAK> / <EOT>
