PT6553_10 Datasheet, PDF (14/41 Pages) Princeton Technology Corp – LCD Driver IC with Key Input Function

LCD Driver IC with Key Input Function
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PT6553
OUTPUT DATA
KEY DATA: KD1 TO KD30
A key matrix having a maximum of 30 keys maybe constructed using the KO1 to KO6, and KI1 to KI5
lines. If any one of these keys are pressed, the key output data corresponding to the respective key is
set to "1". Please refer to the table below.
KO1/SG41
KO2/SG42
KO3
KO4
KO5
KO6
KI1
KD1
KD6
KD11
KD16
KD21
KD26
KI2
KD2
KD7
KD12
KD17
KD22
KD27
KI3
KD3
KD8
KD13
KD18
KD23
KD28
KI4
KD4
KD9
KD14
KD19
KD24
KD29
KI5
KD5
KD10
KD15
KD20
KD25
KD30
When a key matrix (maximum of 20 keys) are constructed using the KO3 to KO6 and KI1 to KI5 lines
and the KO1/SG41 and KO2/SG42 pins are used as Segment Output Pins via the control data bits --
K0 and K1--, the KD1 to KD10 key data bits are set to "0".
SLEEP ACKNOWLEDGE DATA BIT: SA
SA is sleep acknowledge data bit. SA is set to "1" during the Sleep Mode and "0" during the Normal
Mode. When the key is pressed, the sleep acknowledge data bit will be set to the state.
PT6553 V1.7
- 14 -
November, 2007