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 H8/3834 Series features an on-chip liquid crystal display (LCD) controller/driver. Other on-chip peripheral functions include five timers, a 14-bit pulse width modulator (PWM), three serial communication interface channels, and an analog-to-digital (A/D) converter. Together these functions make the H8/3834 Series ideally suited for embedded control of systems requiring an LCD display.
- CPU : High-speed H8/300L CPU
- 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 32.768 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
- Interrupts 33 interrupt sources
- 13 external interrupt pins: IRQ4 to IRQ0, WKP7 to WKP0
- 20 internal interrupt sources
- Clock pulse generators Two on-chip clock pulse generators
- System clock pulse generator: 1 to 10 MHz
- Subclock pulse generator: 32.768 kH
- Power-down modes Six power-down modes
- Sleep mode
- Standby mode
- Watch mode
- Subsleep mode
- Subactive mode
- Active (medium-speed) mode
- Memory
- Large on-chip memory
- 32-kbyte ROM, 1-kbyte RAM
- I/O ports
- 84 I/O port pins
- I/O pins: 71
- Input pins: 13
- Timers
- Five on-chip timers
- Timer A: 8-bit timer
- Timer B: 8-bit timer
- Count-up timer with selection of seven internal clock signals or event input from external pin
- Auto-reloading
- Timer C: 8-bit timer
- Count-up/count-down timer with selection of seven internal clock signals or event input from external pin
- Auto-reloading
- Timer F: 16-bit timer
- Can be used as two independent 8-bit timers.
- Count-up timer with selection of four internal clock signals or event input from external pin
- Compare-match function with toggle output
- Timer G: 8-bit timer
- Count-up timer with selection of four internal clock signals
- Input capture function with built-in noise canceller circuit
- Serial communication interface
- Three channels on chip
- SCI1: synchronous serial interface Choice of 8-bit or 16-bit data transfer
- SCI2: 8-bit synchronous serial interface
- Automatic transfer of 32-byte data segments
- SCI3: 8-bit synchronous or asynchronous serial interface
- Built-in function for multiprocessor communication
- 14-bit PWM
- Pulse-division PWM output for reduced ripple
- Can be used as a 14-bit D/A converter by connecting to an external low-pass filter.
- A/D converter
- Successive approximations using a resistance ladder resolution: 8 bits
- 12-channel analog input port
- Conversion time: 31/f or 62/f per channel
- LCD controller/driver
- Up to 40 segment pins and 4 common pins
- Choice of four duty cycles (static, 1/2, 1/3, 1/4)
- Segments can be expanded externally
- Segment pins can be switched to general-purpose ports in groups of four
