PT6530 Datasheet, PDF (18/42 Pages) Princeton Technology Corp – LCD Driver IC

PT6530
6.2 CONTROL DATA
6.2.1 S0, S1: SLEEP CONTROL DATA
These control data bits switch between normal mode and sleep mode and set the states of the KS1 to KS6 key scan
outputs during key scan standby.
Control Data
S0
S1
Mode
OSC Oscillator
Segment Outputs Output Pin States During Key Scan Standby
Common Outputs KS1 KS2 KS3 KS4 KS5 KS6
0
0
Normal Oscillator operating
Operating
H
H
H
H
H
H
0
1
Sleep
Stopped
L
L
L
L
L
L
H
1
0
Sleep
Stopped
L
L
L
L
L
H
H
1
1
Sleep
Stopped
L
H
H
H
H
H
H
Note: This assumes that the KS1/S75 and KS2/S76 output pins are selected for key scan output.
6.2.2 K0, K1: KEY SCAN OUTPUT/SEGMENT OUTPUT SELECTION DATA
These control data bits switch the functions of the KS1/S75 and KS2/S76 output pins between key scan output and
segment output.
Control Data
K0
K1
Output Pin State
KS1/S75
KS2/S76
Maximum Number of Input Keys
0
0
KS1
KS2
30
0
1
S75
KS2
25
1
X
S75
S76
20
Notes:
1. X=Don’t care
2. KSn (n=1 or 2): Key scan output
3. Sn (n=75 or 76): Segment output
6.2.3 DT: 1/3 DUTY OR 1/4 DUTY DRIVE SELECTION DATA
This control data bit switches between LCD 1/3 duty or 1/4 duty drive.
DT
Duty Drive Scheme
Output Pin State (COM4/S74)
0
1/4 duty drive
COM4
1
1/3 duty drive
S74
Notes:
1. COM4: Common output
2. S74: Segment output
V1.3
18
June 2010