MITSUBISHI MICROCOMPUTERS
M37274EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
FUNCTIONS
Parameter
Functions
Number of basic instructions
Instruction execution time
71
0.5 µs (the minimum instruction execution time, at 8 MHz oscillation fre-
quency)
Clock frequency
Memory size
8 MHz (maximum)
60 K bytes
ROM
RAM
1024 bytes
ROM correction memory
OSD ROM
64 bytes
11072 bytes
1920 bytes
OSD RAM
I/O
Input/Output ports
7-bit ✕ 1 (N-channel open-drain output structure, can be used as 8-bit
PWM output pins)
P00–P02,
P04–P07
I/O
I/O
I/O
I/O
1-bit ✕ 1
P03
(CMOS input/output structure, can be used as 14-bit PWM output pin)
4-bit ✕ 1 (CMOS input/output structure, can be used as OSD output pin,
INT input pin, serial input pin)
P10, P15–P17
P11–P14
4-bit ✕ 1 (N-channel open-drain output structure, can be used as multi-
2
master I C-BUS interface)
8-bit ✕ 1 (CMOS input/output structure, can be used as A-D input pins)
2-bit ✕ 1 (CMOS input/output structure)
P2
I/O
P30, P31
P40–P44
Input
5-bit ✕ 1 (can be used as A-D input pins, INT input pins, external clock
input pins)
Input
2-bit ✕ 1 (N-channel open-drain output structure when serial I/O is used,
P45, P46
can be used as serial I/O pins)
Output
Input
4-bit ✕ 1 (CMOS output structure, can be used as OSD output)
1-bit ✕ 1 (can be used as sub-clock input pin, OSD clock input pin)
P52–P55
P63
Input
1-bit ✕ 1 (CMOS output structure when LC is oscillating, can be used as
sub-clock output pin, OSD clock output pin)
P64
Input
3-bit ✕ 1 (can be used as data slicer input/output)
P70–P72
Serial I/O
8-bit ✕ 1
2
Multi-master I C-BUS interface
1
A-D converter
PWM output circuit
Timers
6 channels (8-bit resolution)
14-bit ✕ 1, 8-bit ✕ 7
8-bit timer ✕ 6
Subroutine nesting
Interrupt
128 levels (maximum)
External interrupt ✕ 3, Internal timer interrupt ✕ 6, Serial I/O interrupt ✕ 1,
OSD interrupt ✕ 1, Multi-master I C-BUS interface interrupt ✕ 1,
2
Data slicer interrupt ✕ 1, f(XIN)/4092 interrupt ✕ 1, VSYNC interrupt ✕ 1, A-
D conversion interrupt ✕ 1, BRK instruction interrupt ✕ 1
Clock generating circuit
Data slicer
2 built-in circuits (externally connected to a ceramic resonator or a quartz-
crystal oscillator)
Built in
4
RENESAS [ RENESAS TECHNOLOGY CORP ]
