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7.5.6 FUNCTION SET
RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
00001DLNxBR1BR0
x = don’t care
This instruction sets the width of the data bus for the parallel interface modes, the number of
display lines, and the luminance level (brightness) of the VFD. It must be the first command sent
after any reset. DDRAM, CGRAM, and AC contents are not affected by this instruction.
DL = 0: Sets the data bus width for the parallel interface modes to 4-bit (DB7-DB4).
DL = 1: Sets the data bus width for the parallel interface modes to 8-bit (DB7-DB0).
N = 0: Sets the number of display lines to 1 (this setting is not recommended for multiple line
displays).
N = 1: Sets the number of display lines to 2 (this setting is not recommended for single line
displays).
BR1,BR0 = 0,0: Sets the luminance level to 100%.
0,1: Sets the luminance level to 75%.
1,0: Sets the luminance level to 50%.
1,1: Sets the luminance level to 25%.
7.5.7 CGRAM ADDRESS SET
RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0001
CGRAM address
This instruction places the 6-bit CGRAM address specified by DB5-DB0 into the AC (cursor
position). Subsequent data writes (reads) will be to (from) CGRAM. DDRAM and CGRAM
contents are not affected by this instruction.
7.5.8 DDRAM ADDRESS SET
RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0 0 1 DDRAM address
This instruction places the 7-bit DDRAM address specified by DB6-DB0 into the AC (cursor
position). Subsequent data writes (reads) will be to (from) DDRAM. DDRAM and CGRAM
contents are not affected by this instruction.
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M0420SD-204SDAR1-3
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