SC91710A(2001) 查看數據表（PDF） - Silan Microelectronics
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SC91710A Datasheet PDF : 18 Pages
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Silan
Semiconductors
SC91710A/B
PIN DESCRIPTION
Pin No.
Pin Name
SC91710A SC91710B
Description
4
4
C1
*Provides keyboard scanning.
* HKS pin is LOW, the column group stays in “HIGH” state and row group
stays in “LOW” state.
*The keypad is compatible with the standard dual contact matrix keyboard
1
1
C2
(as figure1b), the inexpensive single contact keyboard (as figure 1a), and
electronic input (as figure 1c).
*When HKS is “LOW”, a valid key entry is defined by related Row &
2
2
C3
Column connection or by electronic input (as shown in figure 1c).
*Activation of two or more keys will result in no response, except for single
key.
3
3
C4
*To avoid keyboard-bouncing error, this chip provides built-in debounce
circuit. (The debounce time = 20ms)
14
16
R1
Row
Column
Row
Column
Figure1a: Single contact form Figure1b: Dual contact form
15
17
R2
keyboard configuration
keyboard configuration
Row
VDD
VSS
16
18
R3
Column
VDD
VSS
13
15
R4
Figure1c: Electronic signal input keyboard configuration
*Oscillator input & output pins.
5
5
OSCI *The 3.579545MHz oscillator is formed by a built-in inverter inside of this
chip and by connecting a 3.579545MHz crystal or a ceramic resonator
across the OSCI and OSCO pins. (built-in feedback resistor and capacitor)
6
6
OSCO *When HKS is “LOW”, a valid key-in may turn on this oscillator and
generates a 3.579545 MHz clock.
(to be continued)
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 2.0
2001-11-13
5
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