3

ICS9133X

Block Diagram for ICS9133X

Recommended External Circuit

Reference

Clock

32.768 kHz

crystal

32.768 kHz

14.318 MHz

14.318 MHz

Clock

Generator

Output

Buffers

CPU

OE

16 MHz

12 MHz

24 MHz

CPU Clock

2XCPU

Peripheral

Clocks

Output

Buffers

Output

Buffers

Frequency Select

3

/

Notes:

1. The external components shown should be placed as close to the device as possible.

2. Pins 5 and 15 should be connected together externally. One decoupling capacitor may suffice for both pins.

3. May be part of system decoupling.

4. Crystal load capacitance and feedback bias contained internally on the X1, X2 pins.

20

19

18

17

16

15

14

13

12

11

1

2

3

4

5

6

7

8

9

10

0.1µF

0.1µF

0.1µF

2.2µF

0.1µF

(Note 3)

32.768

kHz

VDDX

(Note 4)

VDD