Description
Data Sheet 17 General Description - 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: – puter 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 ponents - Memory mapped I/O registers - Power saving stop and wait modes Data Sheet 18 1. No security feature is absolutely secure.
Key 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 allows 0.4% accuracy(1) – ± 25% untrimmed
- Auto wakeup from STOP capability
- Configuration (CONFIG) register for MCU configuration options, including: – Low-voltage inhibit (LVI) trip point
- The oscillator frequency is guaranteed to ±5% over temperature and voltage range after trimming. MC68HC908QY/QT Family
- Rev. 3 MOTOROLA
