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Table 12 8-bit operation, 1-line display example; using internal reset (character set ‘A’)
STEP
1
2
3
INSTRUCTION
DISPLAY
power supply on (PCF2103 is initialized by the internal reset
function)
function set
RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0000110000
display mode on/off control
0 0 0 0 0 0 1 1 1 0_
4 entry mode set
0 0 0 0 0 0 0 1 1 0_
5 ‘write data’ to CGRAM/DDRAM
1 0 0 1 0 1 0 0 0 0 P_
6 ‘write data’ to CGRAM/DDRAM
1 0 0 1 0 0 1 0 0 0 PH_
7 to 11
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OPERATION
initialized; no display appears
sets to 8-bit operation, selects 1-line display
turns on display and cursor; entire display is blank after
initialization
sets mode to increment the address by 1 and to shift the
cursor to the right at the time of the write to the
DD/CGRAM; display is not shifted
writes ‘P’; the DDRAM has already been selected by
initialization at power-on; the cursor is incremented by 1
and shifted to the right
writes ‘H’
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12 ‘write data’ to CGRAM/DDRAM
1 0 0 1 0 1 0 0 1 1 PHILIPS_
13 entry mode set
0 0 0 0 0 0 0 1 1 1 PHILIPS_
14 ‘write data’ to CGRAM/DDRAM
1 0 0 0 1 0 0 0 0 0 HILIPS _
writes ‘S’
sets mode for display shift at the time of write
writes space
15 ‘write data’ to CGRAM/DDRAM
1 0 0 1 0 0 1 1 0 1 ILIPS M_ writes ‘M’
16
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