PT6524
FUNCTION DESCRIPTION
CONTROL DATA BITS
CU: NORMAL MODE CURRENT DRAIN CONTROL DATA BIT
This control bit is used to select the current drain (either Normal Current Drain or Low Current Drain) in the Normal Mode.
Please refer to the table below.
CU
0
1
Current Drain (under the Normal Mode)
Normal Current Drain (IDD2, IDD3, IDD4 & IDD5)
Low Current Drain (IDD6, IDD7, IDD8 & IDD9)
It should be noted that when the Low Current Drain is selected by setting the CU to “1”, the output waveforms of the
common and segment driver are easily distorted since the capacity to supply the current to the LCD panel from the
Common and Segment Pins is less than capacity under the Normal Current Drain (CU = “0”).
P0 TO P3: SEGMENT/ GENERAL PURPOSE OUTPUT PORT SELECT BITS
These control bits are used to select the function of the SG1/P1 to SG12/P12 output pins (either Segment Output Pins or
General Purpose Output Pins). Please refer to the table below.
Control Data
Output Pins
SG1/ SG2/ SG3/ SG4/ SG5/ SG6/ SG7/ SG8/ SG9/ SG10 SG11 SG12/
P0 P1 P2 P3
P1
P2
P3
P4
P5
P6
P7
P8
P9
/P10
/P11
P12
0
0
0
0
SG1 SG2 SG3 SG4 SG5 SG6 SG7 SG8 SG9 SG10 SG11 SG12
0
0
0
1
P1
SG2 SG3 SG4 SG5 SG6 SG7 SG8 SG9 SG10 SG11 SG12
0
0
1
0
P1
P2
SG3 SG4 SG5 SG6 SG7 SG8 SG9 SG10 SG11 SG12
0
0
1
1
P1
P2
P3
SG4 SG5 SG6 SG7 SG8 SG9 SG10 SG11 SG12
0
1
0
0
P1
P2
P3
P4
SG5 SG6 SG7 SG8 SG9 SG10 SG11 SG12
0
1
0
1
P1
P2
P3
P4
P5
SG6 SG7 SG8 SG9 SG10 SG11 SG12
0
1
1
0
P1
P2
P3
P4
P5
P6
SG7 SG8 SG9 SG10 SG11 SG12
0
1
1
1
P1
P2
P3
P4
P5
P6
P7
SG8 SG9 SG10 SG11 SG12
1
0
0
0
P1
P2
P3
P4
P5
P6
P7
P8
SG9 SG10 SG11 SG12
1
0
0
1
P1
P2
P3
P4
P5
P6
P7
P8
P9
SG10 SG11 SG12
1
0
1
0
P1
P2
P3
P4
P5
P6
P7
P8
P9
P10
SG11 SG12
1
0
1
1
P1
P2
P3
P4
P5
P6
P7
P8
P9
P10
P11
SG12
1
1
0
0
P1
P2
P3
P4
P5
P6
P7
P8
P9
P10
P11
P12
When the General Purpose Output Port Function is selected, the correspondence between the output pins and the
respective display data is given in the table below.
Output Pin
Corresponding Display Data
Output Pin
Corresponding Display Data
SG1/P1
D1
SG7/P7
D25
SG2/P2
D5
SG8/P8
D29
SG3/P3
D9
SG9/P9
D33
SG4/P4
D13
SG10/P10
D37
SG5/P5
D17
SG11/P11
D41
SG6/P6
D21
SG12/P12
D45
When the General Purpose Output Port Function is selected, the respective output pin is output a “HIGH” level when it
corresponding display data is set to “1”. Likewise, it will output a “LOW” level, if its corresponding display data is set to
“0”.
For example, SG4/P4 is used as a General Purpose Output Port, if its corresponding display data – D13 is set to “1”,
then SG4/P4 will output “HIGH” level. Likewise, if D13 is set to “0”, then SG4/P4 will output “LOW” level.
V1.3
9
PTC [ PRINCETON TECHNOLOGY CORP ]
