Table of Contents
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Section 1 Overview
Table 1.1
Features
Item
Description
CPU
High-speed H8/300L CPU
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•
•
•
Interrupts
37 interrupt sources
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•
Clock pulse
Two on-chip clock pulse generators
generators
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•
Rev. 6.00 Aug 04, 2006 page 2 of 680
REJ09B0145-0600
General-register architecture
General registers: Sixteen 8-bit registers (can be used as eight 16-bit
registers)
Operating speed
Max. operating speed: 8 MHz
Add/subtract: 0.25 µs (operating at 8 MHz)
Multiply/divide: 1.75 µs (operating at 8 MHz)
Can run on 32.768 kHz or 38.4 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
13 external interrupt sources (IRQ
24 internal interrupt sources
System clock pulse generator:
Maximum 16 MHz (H8/3847R Group, H8/38347 Group, and H8/38447
Group)
Maximum 10 MHz (H8/3847S Group)
Subclock pulse generator: 32.768 kHz, 38.4 kHz
to IRQ
, WKP
to WKP
4
0
7
)
0
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