Clear Display (12H); Luminance Control (11H, Luminance); Cursor Position (10H, Position); Reset (13H) - NCR RealPOS 70XRT User Manual

Clear Display (12h)

This command sets all 40 characters to 20h (space) and moves the cursor to the first
position of the top line.

Luminance Control (11h, LUMINANCE)

This command selects the display luminance. The LUMINANCE byte sets the display
luminance level as defined in the table below. This command is ignored if the LUMINANCE
byte is 00h.
LUMINANCE

Cursor Position (10h, POSITION)

This command sets the cursor position. The POSITION byte moves the cursor position
according to the table below. The next character byte writes to the new position and the cursor
auto-increments to the next position. This command is ignored if the POSITION byte value is
greater than 27h.
1 2 3 4
00h 01h 02h 03h 04h 05h 06h 07h 08h 09h 0Ah 0Bh 0Ch 0Dh 0Eh 0Fh 10h 11h 12h 13h
1
14h 15h 16h 17h 18h 19h 1Ah 1Bh 1Ch 1Dh 1Eh 1Fh 20h 21h 22h 23h 24h 25h 26h 27h
2

Reset (13h)

This command resets the module to the following conditions:
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•
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Character Tables and Codes

Data is written to the display one byte at a time. If the byte received is greater than 1Fh it is
considered as 5x8 dot matrix character data. This character is written to the current cursor
position and the cursor position is then incremented by one. When data is written to the last
character position of the top line the cursor position moves to the first position of the bottom
line. When data is written to the last character position of the bottom line the cursor position
moves to the first position of the top line.
Display Luminance
01h 25%
02h 50%
03h 75%
04h 100%
5 6 7 8 9
100% luminance
All 5x8 dot matrix characters set to 20h (space)
Cursor position set to 00h
Character table set to Table 1
All user defined characters cleared
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Chapter 8: 2x20 Customer Display Interface
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8-3
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