AN1627 Freescale Semiconductor / Motorola, AN1627 Datasheet - Page 26

• Manufacturer Part Number: AN1627
• Description: Low Cost High Efficiency Sensorless Drive for Brushless dc Motor Using MC68HC (7)05MC4
• Manufacturer: Freescale Semiconductor / Motorola

A.2
The following tables show how much of the microcontroller MC68HC05MC4 was used to drive the
sensorless application.
A.2.1 I/O Used
Table 2. summarizes the use of I/O pins. It can be found that six pins are still available.
A.2.2 Modules Used
Motorola’s MC68HC05MC4 microcontroller offers many features which simplify the control of
an application. The following table explains which function modules are used and their purposes.
MOTOROLA
26
Microcontroller Usage
Output Compare
RESET
Input Capture 1
Input Capture 2
Port C
Port D
Port A
Port B
A/D Converter
IRQ
I/O
Core Timer
Module
PWM
SCI
Available pins
Freescale Semiconductor, Inc.
PC0-PC7
PD6-PD7
PA0-PA7
PB4-PB7
RESET
For More Information On This Product,
IRQ
Used
yes
yes
yes
yes
no
no
no
Go to: www.freescale.com
Capture of edge of Zero Crossing Detection signal
Commutation (software Timer2) and synchroniza-
Measurement of Speed Setting, DC-Bus current,
Used pins
tion of A/D conv. with PWM (software Timer1)
PC0-PC2
PC3-PC7
PA1-PA6
RESET
Table 2.
Table 3.
PA0
PB4
PB5
PB6
PB7
PD7
IRQ
PA
PWM of motor phase voltage
DC-Bus voltage
TCAP2 - Zero cross. detection
Purpose
MUX command PhA-PhC
START/STOP command
Communication - TDO
Communication - RDI
Direction command
AD3-AD5; VRefH/L
Wake up signal
Purpose
RUN LED
RESET
PWM
Fault
REV 0.2
AN1627