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IC500 M37903S4CHP (16-bit C-Mos Micro Computer)
Pin No.
Symbol
N a m e
87, 91
V
,V
Power supply input
CC
SS
33
MD0
MD0
54
MD1
MD1
32
RESET
Reset input
35
X
Clock input
IN
36
X
Clock output
OUT
External data bus width
30
BYTE
select input
Clock division select
31
CDSEL
input
88
AV
,
Analog power supply
CC
90
AV
input
SS
89
V
Reference voltage input
REF
P0
/A
-
Address (high-order)
0
16
56-63
P0
/A
output
7
23
P1
/D
-
0
0
Data (low-order) I/O
46-53
P1
/D
7
7
P2
/D
-
I/O port p2,
0
8
38-45
P2
/D
Data (high-order) I/O
7
15
26-29
P3
- P3
I/O port P3
0
3
18-25
P4
- P4
I/O port P4
0
7
10-17
P5
- P5
I/O port P5
0
7
5-9
P6
- P6
I/O port P6
0
7
1, 94-100
P7
- P7
I/O port P7
0
7
2-4, 80,
P8
- P8
I/O port P8
0
7
81, 93
P10
/A
-
Address (low-order)
0
0
72-79
P10
A
output
7
7
P11
/A
-
Address (middle-order)
0
8
64-71
P11
/A
output
7
15
92
NMI
Non-mask able interrupt
Note : The X
-input-clock division select bit is used to determine whether the input clock to pin X
IN
DVD P.C.B.
Input/
Output
Apply 5V ±0.5V to Vcc, and 0V to Vss.
—
Input
Connect this pin to Vcc.
Input
Connect this pin to Vss.
Input
The microcomputer is reset when Vss-level voltage is applied to this pin.
Input
Input and output pins of the internal clock generating circuit.
Output
This pin determines whether the external data bus has an 8-bit width or 16-bit width for the
memory expansion mode or microprocessor mode. The width is 16 bits when V
Input
voltage is input, and 8 bits when V
resister setting, the external data bus for each of areas CS
This pin determines the X
IN
Input
level at pin X
.
IN
Power supply input pins for the A-D converter and the D-A converter. Connect AV
—
and AV
to V
externally.
SS
SS
Input
This is the reference voltage input pin for the A-D converter and the D-A converter.
Address (A
-A
) is output. These pins also function as I/O port pins according to the register
16
23
Output
setting.
The low-order 8 bits of data (D
I/O
width, address (LA
-LA
) output and data (D
0
7
time-sharing method, according to the register setting.
When 8-bit external data bus is used.
Port P2 is an 8-bit I/O port. This port has an I/O direction register, and each pin can be
I/O
programmed for input or output. These pins enter the input mode at reset.
When 16-bit external data bus is used.
The high-order 8 bits of data (D
P30 functions as an input pin of RDY; and P31, P32. P33 function as the output pins of RD,
I/O
BLW, BHW, respectively. P30 also functions as an I/O port pin according to the register
setting. When the external data has a width of 8 bits, be BHW pin functions
P4
- P4
function as output or input pins of ALE,
0
4
I/O
I/O port pins, respectively. According to the register setting, P4
pins, and P4
- P4
as output pins of CS
5
7
Port P5 is an 8-bit I/O port. This port has an I/O direction register, and each pin can be
programmed for input or output. These pins enter the input mode at reset. These pins also
I/O
function as I/O pins for timers A0 - A3, output pins for the real-time output pins for the real-time
output, and input pins for the key-input interrupt.
Port P6 is an 8-bit I/O port. This port has an I/O direction register, and each pin can be
programmed for input or output. These pins enter the input mode at reset. These pins also
I/O
function as I/O pins for timers A4, input pins for external interrupt inputs INT
pins for timers B0 - B2.
Port P7 is an 8-bit I/O port. This port has an I/O direction register, and each pin can be
programmed for input or output. These pins enter the input mode at reset. These pins also
I/O
function as input pins for the A-D converter, output pins for the D-A converter, and input pins
for INT
, INT
, and INT
.
2
3
4
Port P8 is an 8-bit I/O port. This port has an I/O direction register, and each pin can be
I/O
programmed for input or output. These pins enter the input mode at reset.
These pins also function as I/O pins for UART0, UART1, and input pins for INT
Output Address (A
-A
) is output.
0
7
Address (A
-A
) is output. These pins also function as I/O port pins according to the register
8
15
Output
setting.
Input
This pin is for a non-mask able interrupt.
Description
-level voltage is applied. When BYTE=V
CC
to CS
1
-input-clock division select bit's (note) state at reset and the input
-D
) are input /output. When the external data bus has an 8-bit
0
7
-D
) input/output can be performed with the
0
7
- D
) are input or output.
8
15
φ
1, HLDA, HOLD, CS
- P4
0
- CS
.
1
3
is to be divided or not.
IN
DVR-S60/NX-SW60
-level
SS
level, by the
SS
can have a width of 8 bits.
3
to V
,
CC
CC
, and P4
- P4
as
0
5
7
also function as I/O port
3
- INT
, and input
0
2
and INT
.
3
4
63
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