AV9155
Pin Configuration
20-Pin DIP or SOIC
20-Pin DIP or SOIC
Pin Descriptions for AV 9155-01, 9155-02
PIN
NUMBER
PIN NAME
TYPE
DESCRIPTION
1
2
1.843 MHz
Output
Output
Input
-
1.84 MHz clock output.
Crystal connection.
Crystal connection.
X2
3
X1
4
VDD
Digital power supply (3.3V or 5.0V).
Digital Ground.
5
GN D
-
6
16 MHz/32 MHz
24 MHz
12 MHz
AGND
O E
Output
Output
Output
-
16 MHz (-01) or 32 MHz (-02) clock output.
24 MHz floppy disk/combination I/O clock output.
12 MHz keyboard clock output.
7
8
9
Analog ground (original version).
10
11
12
13
14
15
16
17
18
19
20
Input
Input
Input
Output
Output
-
O utput enable. Tristates all outputs when low. (Has internal pull-up.)
CPU clock frequency select #2. (Has internal pull-up.)
Power-down. Shuts off entire chip when low. (Has internal pull-up.)
14.318 MHz reference clock output.
14.318 MHz reference clock output.
Digital ground.
FS2
PD#
14.318 MHz
14.318 MHz
GND
VDD
-
Digital power supply (3.3V or 5.0V).
2X CPU clock output.
2XCPU
CPU
Output
Output
Input
Input
1X CPU clock output.
FS1
CPU clock frequency select #1. (Has internal pull-up.)
CPU clock frequency select #0. (Has internal pull-up.)
FS0
2
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