Hitachi H8/3937 Series Hardware Manual page 14

Table 1-1 Features
Item Description
CPU High-speed H8/300L CPU
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Interrupts 36 interrupt sources
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Clock pulse Two on-chip clock pulse generators
generators
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Power-down Seven power-down modes
modes
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2
General-register architecture
General registers: Sixteen 8-bit registers (can be used as eight 16-bit
registers)
Operating speed
 Max. operating speed: 5 MHz
 Add/subtract: 0.4 µs (operating at 5 MHz)
 Multiply/divide: 2.8 µs (operating at 5 MHz)
 Can run on 76.8 kHz or 160 kHz subclock
Instruction set compatible with H8/300 CPU
 Instruction length of 2 bytes or 4 bytes
 Basic arithmetic operations between registers
 MOV instruction for data transfer between memory and registers
Typical instructions
 Multiply (8 bits × 8 bits)
 Divide (16 bits ÷ 8 bits)
 Bit accumulator
 Register-indirect designation of bit position
12 external interrupt sources (IRQ4 to IRQ1, WKP7 to WKP0)
23 internal interrupt sources
1 internal IRQ0 interrupt source (IRQ0)
System clock pulse generator: 2 to 10 MHz
Subclock pulse generator: 160 kHz, 76.8 kHz
Sleep (high-speed) mode
Sleep (medium-speed) mode
Standby mode
Watch mode
Subsleep mode
Subactive mode
Active (medium-speed) mode