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LCD Driver IC
PT6584
OUTPUT PIN STATES DURING THE RESET PERIOD
Output Pin
S1/P1 to S4/P4
S5 to S53
State during Reset
L (Note 2)
L
COM1 to COM4
KS1/S54. KS2/S55
KS3 to KS5
KS6
L
L (Note 2)
X (Note 3)
H
DO
H (Note 4)
Notes:
1. X=Don’t care
2. These output pins are forcibly set to the segment output function and held low.
3. When power is first applied, these output pins are undefined until the S0 and S1 control data bits
have been transferred.
4. Since this output pin is an open-drain output, a pull-up resistor of between 1 and 10KΩ is required.
This pin remains high during the reset period even if a key data read operation is performed.
PT6584 V1.1
- 25 -
August, 2006
PTC [ PRINCETON TECHNOLOGY CORP ]
