HARDWARE
1.3 Performance Overviews
Table 1.3.2 Performance Overview of 7481 Group
Items
Performance
Number of Basic Instructions
71 (69 basic instructions of 740 Family and 2 Multiply and
Divide instructions)
Instruction Execution Time
0.5 µs (the minimum instructions at f(XIN) = 8 MHz)
Clock Input Oscillation Frequency
8 MHz (Max.)
M37481M2
4096 bytes
ROM M37481M4
8192 bytes
Memory
M37481M8/E8
16384 bytes
Size
M37481M2
128 bytes
RAM M37481M4
256 bytes
M37481M8/E8
448 bytes
P0
8 bits
Input/
Output
Ports
P1
I/O
P4
P5
P2
Input
P3
8 bits
4 bits
4 bits
8 bits
4 bits
Input/Output
Characteristics
Input/Output Voltage
Output Current
5V
–5 mA to 10 mA (P0, P1: CMOS 3-State Buffer)
10 mA (P4, P5: N-Channel open-drain)
Serial I/O
8 bits × 1
Timers
16-bit timer × 2
8-bit timer × 2
M37481M2
64 levels (Max.)
Subroutine Nesting M37481M4
96 levels (Max.)
M37481M8/E8
192 levels (Max.)
Interrupt Sources
5 external, 8 internal, and 1 software interrupt sources
A-D Converter
8-channel analog inputs
(Successive Comparison Conversion)
(alternative function of Port 2 pins)
Clock Generator
Built-in circuit with a feedback resistor; a ceramic resonator external
Watchdog Timer
Built-in circuit
Power Supply
2.7 V to 4.5 V (f(XIN) = (2.2 VCC–2) MHz)
4.5 V to 5.5 V (f(XIN) = 8 MHz)
Power Dissipation
35 mW (typical value at f(XIN) = 8 MHz)
Operating Temperature Range
–20 °C to 85 °C (–40 °C to 85 °C for Extended Operating
Temperature Range Version)
Device Structure
CMOS Silicon Gate
M37481Mx/E8-XXXSP
42-Pin Shrink Plastic DIP
M37481MxT/E8T-XXXSP
Package
M37481E8SS
42-Pin Shrink Ceramic DIP
M37481Mx/E8-XXXFP
44-Pin Plastic QFP
M37481MxT/E8T-XXXFP
7480 Group and 7481 Group User's Manual
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