SC9102C データシートの表示（PDF） - Silan Microelectronics

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SC9102C

Tone / Pulse Dialer With Redial Function

Silan Microelectronics 

Silan

Semiconductors

SC9102C/D

PIN DESCRIPTION

Pin No. Pin Name

Description

15

C1

*Provides keyboard scanning.

* HKS pin is LOW, the column group stays in “HIGH” and row group stays in “LOW”

state.

16

C2

*The keypad is compatible with the standard dual contact matrix keyboard (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 & Column

17

C3

connection or by electronic input.

*Activation of two or more keys will result in no response, except for single key.

*To avoid keyboard-bouncing error, this chip provides built-in debounce circuit. (The

18

C4

debounce time = 20ms)

1

R1

2

R2

3

R3

4

R4

Row

Column

Figure1a: Single contact form

keyboard configuration

Row

Column

Figure1b: Dual contact form

keyboard configuration

Row

VDD

VSS

Column

VDD

VSS

Figure1c: Electronic signal input keyboard configuration

*Oscillator input & output pins.

8

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)

9

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 CO.,LTD.

Rev: 2.0 2001-11-02

5

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