Datasheet

MC68HC908QYA/QTA Family Data Sheet, Rev. 3
Freescale Semiconductor 15
Chapter 1
General Description
1.1 Introduction
The MC68HC908QY4A 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.
0.4
1.2 Features
Features include:
• High-performance M68HC08 CPU core
• Fully upward-compatible object code with M68HC05 Family
• 5-V and 3-V operating voltages (V
DD
)
• 8-MHz internal bus operation at 5 V, 4-MHz at 3 V
• Trimmable internal oscillator
– Software selectable 1 MHz, 2 MHz, or 3.2 MHz internal bus operation
– 8-bit trim capability
– ±25% untrimmed
– Trimmable to approximately 0.4%
(1)
• Software selectable crystal oscillator range, 32–100 kHz, 1–8 MHz and 8–32 MHz
• Software configurable input clock from either internal or external source
• Auto wakeup from STOP capability using dedicated internal 32-kHz RC or bus clock source
• On-chip in-application programmable FLASH memory
– Internal program/erase voltage generation
– Monitor ROM containing user callable program/erase routines
– FLASH security
(2)
Table 1-1. Summary of Device Variations
Device
FLASH
Memory Size
ADC
Pin
Count
MC68HC908QT1A 1536 bytes — 8 pins
MC68HC908QT2A 1536 bytes 6 channel, 10 bit 8 pins
MC68HC908QT4A 4096 bytes 6 channel, 10 bit 8 pins
MC68HC908QY1A 1536 bytes — 16 pins
MC68HC908QY2A 1536 bytes 6 channel, 10 bit 16 pins
MC68HC908QY4A 4096 bytes 6 channel, 10 bit 16 pins
1. See 16.11 Oscillator Characteristics for internal oscillator specifications
2. No security feature is absolutely secure. However, Freescale’s strategy is to make reading or copying the FLASH difficult for
unauthorized users.