8032 Microcontroller (U6); Pin Assignments For The 8032 Microcontroller - Wyse WY-120 Maintenance Manual

4-2 Theory of Operations
8032 Microcontroller (US) The 8032 is a control-oriented single chip microprocessor with
four major ports (Figure 4-2). Table 4-1 lists the pin assignments
for the 8032 microcontroller.
Figure 4-2 8032 Microcontroller
Diagram
Printer Port
STAB~
BANK SELECT...__
KEYBOARD DATA
..
DTR.__
V-SIZE.__
Port 1
DTR/RTS ENABLE...__
ATS.--
DCD ____.
AST
..
RXD
..
TXD.__
V-SYNC
. .
OPTION INTERRUPT
. .
H-SYNC
. .
CTS,.__
Port 3
WR,.__
RD..--
XTAL-2,.__
XTAL-1
. .
Vss,.__
Table 4-1 Pin Assignments for
the 8032 Microcontroller (US)
Pin
1
2
3
4
s
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
INTO
13
INT1
14
TO
15
T1
16
17
18
19
20
40
~Vee
39
..
38
...
. .
37
...
. .
36
.........
Low-Order
35
...
..
Address/
Data Bus
34
...
..
33
...
..
32
. . ..
EA
31
30
..
ALE
29
..
PSEN
28
..
27
. .
26
. .
25
. .
High-Order
24
..
Address Bus
23
. .
22
. .
21
. .
Description
Printer port strobe
Bank select for the 27010 EPROM
Data input from the keyboard
DTR
Vertical size (should be high only in 78-Hz mode)
RS232/RS422 select
Request to send (RTS) output signal
Receive line signal detector (DCD) input signal
Reset
Data receive (RXD) input signal
Transmitted data (TXD) output signal
Vertical sync inpuL signal
Port 0
Port 2