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4-4-6. FUNCTION SET
RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
00001DLN×
BR1 BR0
×=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. 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).
N = 1 : Sets the number of display lines to 2
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%.
4-4-7.
CGRAM ADDRESS SET
RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0001 CG RAM 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.
4-4-8. DDRAM ADDRESS SET
RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0 0 1 DD RAM 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.
4-4-9.
ADDRESS COUNTER READ
RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0 1 BF=0
AC Contents
This instruction reads the current 7-bit address from the AC on DB6-DB0 and the busy
flag (BF) bit (always 0) on DB7. DDRAM, CGRAM, and AC contents are not affected
by this instruction. Because the BF is always 0, the host never has to read the BF bit to
determine if the module is busy before sending data or instructions. Therefore, data and
instructions can be sent to the module continuously according to the E, WR/, and SCK
cycle times specified in section 2.5 AC Timing Specifications. Due to this feature, the
execution times for each instruction are not specified.
M0220SD-202SDAR1
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相关PDF资料
M0224SD-242MDBR1-1
MODULE VF CHAR 2X24 5.34MM
M0240SD-402MDAR1-3
MODULE VF CHAR 2X40 5.34MM
M0420SD-204MDAR1-C
MODULE VF CHAR 4X20 4.87MM
M0420SD-204SDAR1-3
MODULE VF CHAR 4X20 4.84MM
M1MA142WAT1G
DIODE SW DUAL SS CA 80V SOT-323
M1MA142WKT1G
DIODE SW DUAL SS CC 80V SOT-323
M1MA152WAT1
DIODE SWITCH DUAL CA 80V SC59
M1MA152WKT1G
DIODE SWITCH DUAL CA 80V SC59
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