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LCD Driver IC
PT6584
P0 TO P2: SEGMENT OUTPUT PORT/GENERAL-PURPOSE OUTPUT PORT
SELECTION DATA
These control data bits switch the functions of the S1/P1 to S4/P4 output pins between the segment
output port and the general-purpose output port.
Control Data
Output Pin State
P0
0
0
0
0
P1
0
0
1
1
P2
0
1
0
1
S1/P1 S2/P2 S3/P3 S4/P4
S1
P1
P1
P1
P1
S2
S2
P2
P2
P2
S3
S3
S3
P3
P3
S4
S4
S4
S4
P4
1
0
0
Notes:
1. Sn (n=1 to 4): Segment output port
2. Pn (n=1 to 4): General-purpose output port
The table below lists the correspondence between the display data and the output pins when these
pins are selected to be general-purpose output ports.
Output Pin
S1/P1
Corresponding Display Data
D1
D5
S2/P2
S3/P3
D9
S4/P4
D13
For example, if the S4/P4 output pin is selected to be a general-purpose output port, the S4/P4 output
pin will output a high level (VLCD) when the display data D13 is 1, and will output a low level (Vss) when
D13 is 0.
PT6584 V1.1
- 11 -
August, 2006
PTC [ PRINCETON TECHNOLOGY CORP ]
