SC9102C SILAN [Silan Microelectronics Joint-stock], SC9102C Datasheet - Page 5

• Manufacturer Part Number: SC9102C
• Description: TONE/PULSE DIALER WITH REDIAL FUNCTION
• Manufacturer: SILAN [Silan Microelectronics Joint-stock]

PIN DESCRIPTION
Pin No.
15
16
17
18
1
2
3
4
8
9
Silan
Semiconductors
Pin Name
OSCO
OSCI
C1
C2
C3
C4
R1
R2
R3
R4
HANGZHOU SILAN MICROELECTRONICS CO.,LTD.
*Provides keyboard scanning.
* HKS pin is LOW, the column group stays in “HIGH” and row group stays in “LOW”
*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
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
debounce time = 20ms)
*Oscillator input & output pins.
*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)
*When HKS is “LOW”, a valid key-in may turn on this oscillator and generates a
3.579545 MHz clock.
state.
Figure1a: Single contact form
Row
keyboard configuration
Column
Row
Figure1c: Electronic signal input keyboard configuration
5
Column
Description
Figure1b: Dual contact form
keyboard configuration
SC9102C/D
V
V
V
V
Column
DD
DD
SS
SS
Row
Rev: 2.0
(to be continued)
2001-11-02