MITSUBISHI MICROCOMPUTERS
M37224M3-XXXSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
with ON-SCREEN DISPLAY CONTROLLER
DESCRIPTION
PIN CONFIGURATION (TOP VIEW)
The M37224M3-XXXSP is a single-chip microcomputer designed with
CMOS silicon gate technology. They are housed in a 42-pin shrink
plastic molded DIP.
In addition to their simple instruction sets, the ROM, RAM and I/O
addresses are placed on the same memory map to enable easy pro-
gramming.
H
SYNC
SYNC
P5
2
/R
1
2
3
42
41
40
39
V
P5
P5
P5
P2
P2
P2
3
/G
/B
4
P0
P0
P0
P0
P0
P0
0
1
2
3
4
5
/PWM0
/PWM1
/PWM2
/PWM3
/PWM4
/PWM5
The M37224M3-XXXSP has a PWM output function and a OSD dis-
play function, so it is useful for a channel selection system for TV.
5
0
1
2
/OUT
/SCLK
/SOUT
/SIN
4
5
38
37
36
6
7
8
FEATURES
Number of basic instructions..................................................... 71
•
•
35
34
P1
P1
P1
P1
P1
0
Memory size
1
9
P06
/INT2/A-D4
P0 /INT1
ROM ....................................................... 12 K bytes
RAM ..........................................................256 bytes
ROM for display ........................................ 8 K bytes
RAM for display ..........................................96 bytes
7
10
2
3
4
33
32
11
12
P2
P2
3
/TIM3
/TIM2
31
4
P25
P26
P27
13
14
30
29
P15
P16
P17
P30
/A-D1/INT3
/A-D2
Minimum instruction execution time
•
......................................... 0.5 µs (at 8 MHz oscillation frequency)
15
16
17
28
27
26
25
24
/A-D3
Power source voltage...................................................5 V ± 10 %
•
•
/A-D5/DA1
D-A
P3
CNVSS
Power dissipation ............................................................. 165 mW
2
P31
/A-D6/DA2
(at 8 MHz oscillation frequency, VCC=5.5V, at CRT display)
18
19
RESET
OSC1/P3
OSC2/P3
Subroutine nesting ....................................... 96 levels (maximum)
•
X
IN
OUT
SS
3
4
Interrupts ....................................................... 13 types, 13 vectors
•
X
20
21
23
22
8-bit timers .................................................................................. 4
•
V
VCC
Programmable I/O ports (Ports P0, P1, P2, P30–P32) .............. 27
•
Input ports (Ports P33, P34) ........................................................ 2
•
Output ports (Ports P52–P55)...................................................... 4
•
12 V withstand ports.................................................................... 6
•
Outline 42P4B
LED drive ports ........................................................................... 4
•
Serial I/O ............................................................ 8-bit ✕ 1 channel
•
A-D comparator (6-bit resolution) ................................. 6 channels
•
D-A converter (6-bit resolution) ................................................... 2
•
PWM output circuit ......................................... 14-bit ✕ 1, 8-bit ✕ 6
•
ROM correction function ........................................... 32 bytes ✕ 2
•
CRT display function
•
Number of display characters................ 20 characters ✕ 2 lines
(16 lines maximum)
Kinds of characters ..................................................... 128 kinds
Dot structure ...........................................................12 ✕ 16 dots
Kinds of character sizes .................................................. 3 kinds
Kinds of character colors (It can be specified by the character)
maximum 7 kinds (R, G, B)
Kinds of raster colors (maximum 7 kinds)
Display position
Horizontal .................................................................. 64 levels
Vertical .................................................................... 128 levels
Bordering (horizontal and vertical)
APPLICATION
TV