ICS9158-07
Pin Configuration
Functionality
V
DD
=5±10% or 3.3V±10%, TEMP=0-70°C
OE FS2
1
1
1
1
1
1
1
1
0
Note 1:
Note 2:
FS1
0
0
1
1
0
0
1
1
X
FS0
0
1
0
1
0
1
0
1
X
CLK2
Ratio
29/13 X1
29/13 X1
29/13 X1
29/13 X1
14/3 X1
7/2 X1
14/3 X1
21/5 X1
--
CLK2
(Mhz)
31.9
31.9
31.9
31.9
66.8
50.1
66.8
60.1
Tristate
CLK1(0:3) CLK12(0:2)
(Mhz)
(MHz)
16
16
16
16
33.4
25
33.4
30
Tristate
31.9
31.9
31.9
31.9
66.8
50.1
66.8
60.1
Tristate
0
0
0
0
1
1
1
1
X
24-Pin SOIC
All frequencies in MHz, assuming 14.31818 MHz reference frequency.
OE equals Low, tristates CLK2, CLK12(0:2), CLK1(0:3), the REF, 24 MHz
and 48 MHz clocks keep running.
Pin Descriptions
PIN NUMBER
1, 8, 13, 14
2
3
4
5, 12
6
7
9
10
11, 17, 21, 22
15
16
18
19
20
22
23
24
PIN NAME
CLK1A
X2
X1
VDD
GND
48 MHz
24 MHz
AGND
OE
CLK12
FS2
AVDD
REF
GND
VDD
CLK2
FS1
FS0
TYPE
OUT
OUT
IN
PWR
PWR
OUT
OUT
PWR
IN
OUT
IN
PWR
OUT
PWR
PWR
OUT
IN
IN
CPU clock 1 outputs.
Crystal connection.
Crystal connection.
Digital POWER SUPPLY (+5V).
Digital GROUND/
48 MHz clock output.
24 MHz floppy disk/combination I/O clock output.
ANALOG GROUND.
OUTPUT ENABLE. Tristates all clock outputs when low.
CPU clock 12 outputs.
CPU clock frequency select 2.
ANALOG power supply (+5V).
14.318 MHz reference clock output.
Digital GROUND.
Digital POWER SUPPLY (+5V).
CPU clock 2 outputs.
CPU clock frequency select #1.
CPU clock frequency select #0.
DESCRIPTION
2
ICS [ INTEGRATED CIRCUIT SYSTEMS ]
