Описание
The MC68HC908JK8 is a member of the low-cost, high-performance M68HC08 Family of 8-bit microcontroller units (MCUs). All MCUs in the family use the enhanced M68HC08 central processor unit (CPU08) and are available with a variety of modules, memory sizes and types, and package types.
- High-performance M68HC08 architecture
- Fully upward-compatible object code with M6805, M146805, and M68HC05 Families
- Low-power design; fully static with stop and wait modes
- Maximum internal bus frequency:
- 8-MHz at 5V operating voltage
- 4-MHz at 3V operating voltage
- Oscillator options:
- Crystal or resonator
- RC oscillator
- 8,192 bytes user program FLASH memory with security(1) feature
- 256 bytes of on-chip RAM
- Two 16-bit, 2-channel timer interface modules (TIM1 and TIM2) with selectable input capture, output compare, and PWM capability on each channel; external clock input option on TIM2
- 13-channel, 8-bit analog-to-digital converter (ADC)
- Serial communications interface module (SCI)
- 26 general-purpose input/output (I/O) ports:
- 8 keyboard interrupt with internal pull-up
- 11 LED drivers (sink)
- 2 × 25mA open-drain I/O with pull-up
- Resident routines for in-circuit programming and EEPROM emulation
- System protection features:
- Optional computer operating properly (COP) reset, driven by internal RC oscillator
- Optional low-voltage detection with reset and selectable trip points for 3V and 5V operation
- Illegal opcode detection with reset
- Illegal address detection with reset
- Master reset pin with internal pull-up and power-on reset
- IRQ with schmitt-trigger input and programmable pull-up
- 20-pin dual in-line package (PDIP), 20-pin small outline integrated package (SOIC), 28-pin PDIP, 28-pin SOIC, 32-pin shrink dual in-line package (SDIP), and 32-pin low-profile quad flat pack (LQFP)
- Specific features of the MC68HC908JK8 in 28-pin packages are:
- 23 general-purpose I/Os only
- 7 keyboard interrupt with internal pull-up
- 10 LED drivers (sink)
- 12-channel ADC
- Timer I/O pins on TIM1 only
- Specific features of the MC68HC908JK8 in 20-pin packages are:
- 15 general-purpose I/Os only
- 1 keyboard interrupt with internal pull-up
- 4 LED drivers (sink)
- 10-channel ADC
- Timer I/O pins on TIM1 only
