Description
The H8/300L Series is a series of single-chip microcomputers (MCU: microcomputer unit), built around the high-speed H8/300L CPU and equipped with peripheral system functions on-chip.Within the H8/300L Series, the H8/3857 Group and H8/3854 Group feature on-chip liquid crystal display (LCD) controllers. Other on-chip peripheral functions include a LCD controller, timers, serial communication interface, and an analog-to-digital (A/D) converter. Together these functions make the H8/3857 Group and H8/3854 Group ideally suited for embedded control of systems requiring an LCD display.The H8/3857 Group comprises the H8/3855, with 40 kbytes of ROM and 2 kbytes of RAM on chip, the H8/3856, with 48 kbytes of ROM and 2 kbytes of RAM, and the H8/3857, with 60 kbytes of ROM and 2 kbytes of RAM. H8/3854 Group mask ROM versions are the H8/3852, with 16 kbytes of ROM and 1 kbyte of RAM on-chip, the H8/3853, with 24 kbytes of ROM and 1 kbyte of RAM, and the H8/3854, with 32 kbytes of ROM and 1 kbyte of RAM.
- High-speed H8/300L CPU
- 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 32.768 kHz sub clock
- 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
