MC68HC705MC4 Datasheet, PDF (10/99 Pages) Motorola, Inc – Microcontrollers

MC68HC705MC4 Specification Rev. 1.5
SECTION 1
INTRODUCTION
The Motorola MC68HC705MC4 microcontroller is a low-cost M68HC05 Family EPROM
microprocessor intended for use in industrial motor control and power supply applications.
It features a 2-channel, 8-bit high speed PWM module (including a commutation mux for
brushless permanent magnet motor control), a 6 input, 8-bit A/D to accommodate analog
feedback signals, and an SCI to support multi-controller networking. This device is
available in the 28-pin PDIP and 28-pin SOIC package.
1.1 FEATURES (all timing based on 3 MHz bus)
• Low cost, HC05 Core running at 3 MHz bus speed (at V_DD = 5 V +/- 10%)
• 28-pin PDIP, SOIC or windowed ceramic package. Low EMI emission
pinout
• 3584 Bytes of User EPROM (including eight User Vectors of 2 Bytes
each)
• 176 Bytes of User RAM
• Dual channel, high speed PWM featuring:
- 8-bit resolution
- Independent prescaler frequency selection and period counters
- 2 frequency ranges, 9 steps in each:
A: 183 Hz to 23.4 kHz, B: 122 Hz to 15.6 kHz
- S/W programmable PWM polarity
- Dual S/W controllable PWM output mux (each PWM to 3 I/O)
• 8-bit +/- 1LSB A/D converter with 6 input mux. High and low references.
Conversion rate = 10.7 µS
• 16-bit timer with 2 input captures or 1 input capture plus 1 output
compare. Resolution = 1.33 µS. Input Capture active edge S/W
selectable as rising, falling, or both
• 15-stage multi-function Core Timer with timer overflow, real-time
interrupt and watchdog
• Asynchronous Serial Communications Interface (SCI)
• 22 general purpose I/O lines, some shared with peripheral functions
• One 8-bit high source current I/O port (10 mA/pin @ V_DD-2.0 V, 20 mA
max/port) (Port A)
• One high sink current (10mA @ 1.0 V) output pin (PB7)
Section 1: Introduction
MOTOROLA
Page 1