Advanced Card ACR89U-A2, Reference Manual

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ACR89U-A2 – Reference Manual
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Offset Field Name Type Size Value Description
10 BCmdCode Hex 1 1Ch -
11 wCmdLength Hex 2 0001h
Size of command data (in big
endian)
13
abRfu
Hex 2 0000 Reserved for future
15 bContrastLevel Hex 1
00h to
0x63h
New LCD contrast level
The value range is between 00h to 63h. Larger the value darkens the contrast. Lower range, on the
other hand, brightens the contrast. The whole LCD display and image affects the contrast level.
3.5.2.7. PC_to_ACR89_ClearDisplay
This command clears one or more rows on the LCD display. The cursor will be moved to the position
at the starting point of the cleared block after executing this command. This command context is slot
independent.
Offset Field Name Type Size Value Description
10
BcmdCode
Hex 1 1Dh -
11
wCmdLength
Hex 2 0002h Size of command data (in big endian)
13
AbRfu
Hex 2 0000h Reserved for future
15 bClearMode Hex 1
00h or
01h or
02h
00h = Clear full screen
01h = Clear the row located by the
current position cursor
02h = Clear some columns in a row
starting from current position cursor
All other values RFU
16 bNumber - 1 -
For bClearMode = 01h – Number of
rows to be cleared
For bClearMode = 02h – Number of
columns to be cleared
Not significant otherwise
The response to this command is the ACR89_to_PC_DisplayStatus message.
3.5.2.8. PC_to_ACR89_ReadRTC
This command reads the current real time clock value from the built-in real time clock. The RTC
increments the value every half second. This command context is slot independent.
Offset Field Name Type Size Value Description
10 BCmdCode Hex 1 08h -
11 wCmdLength Hex 2 0000h Size of command data (in big endian)
13 AbRFU Hex 2 0000h -
The response to this command is the ACR89_to_PC_TimeStamp message.
3.5.2.9. PC_to_ACR89_SetRTC
This command sets the real time clock value of the build-in real time clock to a specified value. This
command context is slot independent.