PT6553_10 Datasheet, PDF (23/41 Pages) Princeton Technology Corp – LCD Driver IC with Key Input Function

LCD Driver IC with Key Input Function
Tel: [phone]
Fax: [phone]
URL: http://www.princeton.com.tw
PT6553
STATES OF THE OUTPUT PINS DURING THE RESET PERIOD
The states of the output pins during the reset period are shown in the table below.
Output Pin
SG1/P1 to SG4/P4
SG5 to SG40
COM1 to COM3
KO1/SG41, KO2/SG42
KO3 to KO5
KO6
DO
State during the Reset Period
L(see Note 1)
L
L
L (see Note 1)
x (see Note 2)
H
H (see Note 3)
Notes:
1. These output pins are forcibly set to the "Segment Output Function" and set to "LOW".
2. When the power is first applied, these output pins are undefined until the S0 and S1 control data bits
have been transferred.
3. This output pin is an open drain output, therefore, a 1K to 10 KΩ pull-up resistor is needed. This pin
remains "HIGH" during the reset period even if a key data read operation is performed.
4. x = irrelevant
PT6553 V1.7
- 23 -
November, 2007