ICS9133X Datasheet, PDF (2/8 Pages) Integrated Circuit Systems – 32 kHz Motherboard Frequency Generator

ICS9133X
Pin Configuration
20-Pin PDIP or SOIC
Decoding Table for CPU Clock
SCLK22 SCLK21 SCLK20 2XCPU
CPU
0
0
0
8
4
0
0
1
16
8
0
1
0
32
16
0
1
1
40
20
1
0
0
50
25
1
0
1
66.6
33.3
1
1
0
80*
40*
1
1
1
100*
50*
* Only at 5V supply voltage
Pin Descriptions
PIN
NUMBER
1
2
PIN NAME
32 kHz
X2
3
X1
4
VDD32
5
VDD
6
GND
7
16 MHz
8
24 MHz
9
12 MHz
10
GND
11
OE
12
VDD
13
14.318 MHz
14
GND
15
VDD
16
2XCPU
17
CPU
18
SCLK2
19
SCLK1
20
SCLK0
TYPE
Output
Output
Input
-
-
-
Output
Output
Output
-
Input
-
Output
-
-
Output
Output
Input
Input
Input
DESCRIPTION
32.768 kHz buffered output, powered by VDD32.
Connect 32.768 kHz crystal. Includes internal XTAL load capacitance.
Connect 32.768 kHz crystal. This pin includes internal XTAL load capacitance and
feedback bias for a 32.768 kHz crystal.
Power supply for 32 kHz oscillator only.
Power supply (+3.3 to +5.0V).
GROUND.
16 MHz clock output.
24 MHz clock output.
12 MHz clock output.
GROUND.
OE tristate outputs when low. Has internal pull-up.
Power supply (+3.3 to +5.0V).
14.318 MHz clock output.
GROUND.
Power supply (+3.3 to +5.0V).
2XCPU clock output (see decoding table).
CPU clock output (see decoding table).
CPU clock frequency SELECT2. Has internal pull-up.
CPU clock frequency SELECT1. Has internal pull-up.
CPU clock frequency SELECT0. Has internal pull-up.
2