User's Manual

PIN Pad 791 Programmer’s Manual (PCI POS-A) UDN PM0103-U Rev. 06
Section 6 – Contact EMV Level 2 transaction messages 2015-04-20
Page105
Uniform Industrial Corp. Proprietary and Confidential Total 342 pages
Message T23 Erase EMV Transaction Log.
Format: <STX>T23<ETX>[LRC]
Message length: Fixed 6 bytes.
Usage: The message is used to purge the memory (flash) area for transaction logs.
Message element:
Field Length Value and description
<STX> 1 <02>
T23 3 Message ID
<ETX> 1 <03>
[LRC] 1 Checksum
Message flow:
HOST Direction PIN pad
Message T23


<ACK> (Good LRC)
<NAK> (Bad LRC)
<EOT> (after 3 NAKs)