MC68HC908QY4 Maximum Ratings
MC68HC908QY4 Features
• High-performance M68HC08 CPU core
• Fully upward-compatible object code with M68HC05 Family
• 5-V and 3-V operating voltages (VDD)
• 8-MHz internal bus operation at 5 V, 4-MHz at 3 V
• Trimmable internal oscillator
3.2 MHz internal bus operation
8-bit trim capability
± 25% untrimmed
± 5% trimmed
• Auto wake-up from STOP capability
• Configuration (CONFIG) register for MCU configuration options, including:
Low-voltage inhibit (LVI) trip point
• In-system FLASH programming
• FLASH security(1)
• On-chip in-application programmable FLASH memory
(with internal program/erase voltage generation)
MC68HC908QY4 and MC68HC908QT4 - 4096 bytes
MC68HC908QY2, MC68HC908QY1, MC68HC908QT2, and MC68HC908QT1 - 1536 bytes
• 128 bytes of on-chip random-access memory (RAM)
• 2-channel, 16-bit timer interface module (TIM)
• 4-channel, 8-bit analog-to-digital converter (ADC) on MC68HC908QY2, MC68HC908QY4,
MC68HC908QT2, and MC68HC908QT4
• 5 or 13 bidirectional input/output (I/O) lines and one input only:
Six shared with keyboard interrupt function and ADC
Two shared with timer channels
One shared with external interrupt (IRQ)
Eight extra I/O lines on 16-pin package only
High current sink/source capability on all port pins
Selectable pullups on all ports, selectable on an individual bit basis
Three-state ability on all port pins
• 6-bit keyboard interrupt with wakeup feature (KBI)
• Low-voltage inhibit (LVI) module features:
Software selectable trip point in CONFIG register
• System protection features:
Computer operating properly (COP) watchdog
Low-voltage detection with reset
Illegal opcode detection with reset
Illegal address detection with reset
• External asynchronous interrupt pin with internal pullup (IRQ) shared with general-purpose
input pin
• Master asynchronous reset pin (RST) shared with general-purpose input/output (I/O) pin
• Power-on reset
• Internal pullups on IRQ and RST to reduce external components
• Memory mapped I/O registers
• Power saving stop and wait modes
• MC68HC908QY4, MC68HC908QY2, and MC68HC908QY1 are available in these packages:
16-pin plastic dual in-line package (PDIP)
16-pin small outline integrated circuit (SOIC) package
16-pin thin shrink small outline package (TSSOP)
MC68HC908QY4 Connection Diagram
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