2

ICS9133X

Pin Configuration

Decoding Table for CPU Clock

Pin Descriptions

* Only at 5V supply voltage

20-Pin PDIP or SOIC

PIN

NUMBER

PIN NAME

TYPE

DESCRIPTION

1

32 kHz

Output

32.768 kHz buffered output, powered by VDD32.

2

X2

Output

Connect 32.768 kHz crystal. Includes internal XTAL load capacitance.

3

X1

Input

Connect 32.768 kHz crystal. This pin includes internal XTAL load capacitance and

feedback bias for a 32.768 kHz crystal.

4

VDD32

-

Power supply for 32 kHz oscillator only.

5

VDD

-

Power supply (+3.3 to +5.0V).

6

GND

-

GROUND.

7

16 MHz

Output

16 MHz clock output.

8

24 MHz

Output

24 MHz clock output.

9

12 MHz

Output

12 MHz clock output.

10

GND

-

GROUND.

11

OE

Input

OE tristate outputs when low. Has internal pull-up.

12

VDD

-

Power supply (+3.3 to +5.0V).

13

14.318 MHz

Output

14.318 MHz clock output.

14

GND

-

GROUND.

15

VDD

-

Power supply (+3.3 to +5.0V).

16

2XCPU

Output

2XCPU clock output (see decoding table).

17

CPU

Output

CPU clock output (see decoding table).

18

SCLK2

Input

CPU clock frequency SELECT2. Has internal pull-up.

19

SCLK1

Input

CPU clock frequency SELECT1. Has internal pull-up.

20

SCLK0

Input

CPU clock frequency SELECT0. Has internal pull-up.

SCLK22

SCLK21

SCLK20

2XCPU

CPU

0

0

0

0

1

1

1

1

0

0

1

1

0

0

1

1

0

1

0

1

0

1

0

1

8

16

32

40

50

66.6

80*

100*

4

8

16

20

25

33.3

40*

50*