Page MSI-P563 User Manual
1
MSI PC/104
Embedded PC Series
MICROCOM-
PUTER SYS-
TEMS, INC.
I. INTRODUCTION
The MSI-P563, shown in Fig. 1, is a general purpose I/O card
designed for use with all PC/104 embedded systems. The card
provides a versatile mixture of I/O functions for the designer
which includes 24 TTL I/O lines, an IBM PC compatible
asynchronous serial port, and three 16-bit counter/timers, as
shown in the block diagram of Fig. 2. The card is designed for
use in harsh environments such as those which occur in industrial
applications.
A 82C55A PPI provides 24 TTL I/O lines which are programmable
as ports A, B
and C. Ports A and B are programmable as 8-bit
groups of input or output lines. Port C is programmable two 4-bit
groups of input or output lines. Provisions for implementing an
interrupt driven strobed I/O mode are also included using option
jumpers. A 10K pull-up resistor is connected to each I/O line for
accommodating input
connections. Input connections are provided by 50-pin connector
J1 which is compatible with Opto-22 type I/O.
Figure 1. Card outline of the MSI-P563.
J3
JP4
J2
U8
U11
J4
U3
S4
JP5
3 5
1
U7
JP6
U5
3
1
5
9
7
C10
U9
4 6
2
C9
U10
S2
S9
S3
C8
A B
R3
JP1
S6
7
5
9
3
1
C15
C11
U6
S5
C7
R2 R1
C16
C14
JP7
C17
U1
C2
U2
JP3
S1
JP2
4
2
8
6
C13
C4
U4
C3
C6
C12
JP8
C1
+
S8
MICROCOMPUTER SYSTEMS, INC.
1814 RYDER DR*BATON ROUGE,LA
10
12
4
6
8
2
14
13
E
C
A
B
F
D
11
1 2
JP10
TP1
1
A
2
B
XTAL
7
3 5
4 6
2
MSI-P563A
4
12
20
16
24
10
17
18
5
8
2
1
7
8
1
4
J1
1
