VeriFone MX800 series Programmer's Manual page 307

Table 45
Data Elements
DUKPT Engine 1/2
Mode Flag [DEMF]
Note:
<SO>
{LRC}
•
Packet 18 Length:
•
Table 46
Master Device
<SI>18<SO>{LRC}
Packet 18 Format
Characteristics
1AH
This field was
added for IPP8
emulation.
1H
1H
MAX: 8 characters
MIN: 8 characters
Packet 18 Check IPP7 Key Management Mode
IPP MS
AND
Comments
The one ASCII-Hex digit is used
produce half of a control byte.
Bit 0 ( DUKPT Engine "1")
Description
0 1DES DUKPT - Default
1 3DES DUPKT
Bit 1 ( DUKPT Engine "2")
Description
0 1DES DUKPT - Default
1 3DES DUPKT
Bit 2 ~ 3
----------
Reserved
Example:
Engine=
DEMF = 0x30
0x31
0x32
0x33
Shift Out, value: 0Eh
Error Check
Transmit
IPP
Direction
ACK if LRC
•
NAK if LRC incorrect
•
EOT after 3 NAKs
•
<SI>18[KMM][PINER]<SO>{LRC}
X
M 800 S
DUKPT C
OMMUNICATIONS
Common Packets
1 2
0 1DES 1DES
1 3DES 1DES
2 1DES 3DES
3 3DES 3DES
P G
ERIES ROGRAMMERS UIDE
P
ACKETS
307