User's Manual

ACR122L-ACS Design Specification
Version 0.03 19/05/2010
Page
33
of
50
ACR122L
-
ACS
5.7. Pseudo APDU for LCD Display (ASCII Mode)
This APDU is used to Display LCD Message in ASCII Mode
Table 7.0A: LCD Display Command Format (5 Bytes + LCD Message Length)
Command Class INS P1 P2 Lc Data In
(Max. 16Bytes)
LCD Display 0xFF Option
Byte
0x68 LCD XY Position LCD
Message
Length
LCD Message
INS: Option Byte (1 Byte)
CMD Item Description
Bit 0 Character Bold Font 1 = Bold; 0 = Normal
Bit 1 - 3 Reserved
Bit 4 - 5 Table Index
00 = Fonts Set A
01 = Fonts Set B
10 = Fonts Set C
Bits 6 – 7 Reserved
P2: LCD XY Position
The Character to be displayed on the LCD position specified by DDRAM Address
Please follow the DDRAM table below for the LCD character position’s representation
For Fonts Set 1 and 2,
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 DISPLAY
POSITION
1
st
LINE 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
2
nd
LINE 40 41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4E 4F
LCD XY
POSITION
For Fonts Set 3,
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 DISPLAY
POSITION
1
st
LINE 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
2
nd
LINE 20 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F
3
rd
LINE 40 41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4E 4F
4
th
LINE 60 61 62 63 64 65 66 67 68 69 6A 6B 6C 6D 6E 6F
LCD XY
POSITION
Lc: LCD Message Length
The length of the LCD message (max. 0x10); If the message length is longer than the number of
character that the LCD screen’s can be shown, then the redundant character will not be shown on the
LCD