MC68HC908KX2 Maximum Ratings
MC68HC908KX2 Features
• Features of the MC68HC908KX8 MCU include:
• High-performance M68HC08 architecture
• Fully upward-compatible object code with M6805, M146805, and M68HC05 Families
• Maximum internal bus frequencies of:
8 MHz at 5.0 V
4 MHz at 3.0 V
• Internal oscillator requiring no external components:
Software selectable bus frequencies
25 percent accuracy with trim capability to 2 percent
Clock monitor
Option to allow use of external clock source or external crystal/ceramic resonator
• Eight Kbytes of on-chip, in-circuit programmable FLASH memory
• FLASH program memory security(1)
• On-chip programming firmware for use with host personal computer which does not require high voltage for entry
• 192 bytes of on-chip random-access memory (RAM)
• 16-bit, 2-channel timer interface (TIM) module
• 4-channel, 8-bit, analog-to-digital converter (ADC) with highvoltage reference (VREFH) double bonded to VDD pin
• Serial communications interface (SCI) module
• 5-bit keyboard interrupt (KBI) with wakeup feature
• 13 general-purpose input/output (I/O) ports:
Five shared with KBI and TIM, with 15-mA source/15-mA sink capabilities and with programmable pullups on eneralpurpose input ports
Four shared with ADC
Two shared with SCI
• Low-voltage inhibit (LVI) module with software selectable trip points, 2.6-V or 4.3-V trip point
• Timebase module (TBM) with
Clock prescalar for eight user-selectable, periodic real-time interrupts
Active clock source in stop mode for periodic wakeup from stop using external crystal or internal oscillator
• External asynchronous interrupt pin with internal pullup (IRQ1)
• System protection features:
Computer operating properly (COP) reset
Low-voltage detection with reset
Illegal opcode detection with reset
Illegal address detection with reset
• 16-pin plastic dual in-line (PDIP) or small outline (SOIC) package
• Low-power design fully static with stop and wait modes
• Internal power-up reset circuit requiring no external pins
• 40°C to +125°C operation
MC68HC908KX2 Connection Diagram
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