ics9159c-02 Holt Integrated Circuits, Inc., ics9159c-02 Datasheet - Page 2

• Manufacturer Part Number: ics9159c-02
• Description: Frequency Generator Integrated Buffer Pentiumtm
• Manufacturer: Holt Integrated Circuits, Inc.

PIN NUMBER
1, 8, 14,
20, 26
2
3
4, 11, 17, 23
6, 7, 9, 10
13, 12
15, 16, 18 19,
21, 22
5
24
25
28, 27
PIN NAME
VDD
X1
X2
VSS
PCLK(0:3)
FS(0:1)
BCLK(0:5)
OEN
DISK
KEYBD
REF(0:1)
PWR
IN
OUT
PWR
OUT
IN
OUT
IN
OUT
OUT
OUT
TYPE
XTAL output which includes XTAL load capacitance.
Ground for logic, PCLK and fixed frequency output buffers.
Bus clock outputs are fixed at one half the PCLK frequency.
The KEYBD clock is fixed at 12 MHz (with 14.318 MHz input).
Power for logic, PCLK and fixed frequency output buffers.
XTAL or external reference frequency input. This input includes
XTAL load capacitance and feedback bias for a 12 - 16 MHz
crystal, nominally 14.31818 MHz.
Processor clock outputs which are a multiple of the input reference
frequency as shown in the table above.
Frequency multiplier select pins. See table above. These inputs have
internal pull-up devices.
OEN tristates all outputs when low. This input has an internal pull-
up device.
The DISK controller clock is fixed at 24 MHz
(with 14.318 MHz input).
REF is a buffered copy of the crystal oscillator or reference input
clock nominally 14.31818 MHz.
PCLK(0,3)
VCO/2
TCLK/2
FS1
0
0
1
1
FS0
0
1
0
1
DESCRIPTION
PCLK/2
BCLK(0,5)
TCLK/4
118/17xX1
Test mode
92/11xX1
65/7xX1
*VCO
DISK
24 MHz
TCLK/4
X1, REF
(MHz)
14.318
14.318
14.318
TCLK
66.6(66.5)
KEYBD
12 MHz
TCLK/8
50(49.7)
60(59.9)
TCLK/2
(MHz)
CPU