AN1661 Freescale Semiconductor / Motorola, AN1661 Datasheet - Page 11

• Manufacturer Part Number: AN1661
• Description: Low Cost Universal Motor Chopper Drive System
• Manufacturer: Freescale Semiconductor / Motorola

Microcontroller Usage
Total RAM
and ROM Used
I/O Use
AN1661
MOTOROLA
Table 2
significant part of the memory is still available.
Table 3
Port A
Port B
Port C
Port D
Freescale Semiconductor, Inc.
I/O
For More Information On This Product,
shows how much memory is needed to run the chopper drive. A
Memory
summarizes the use of the I/O pins. Nine pins are still available.
SRAM
ROM
PA0–PA7
PB4–PB7
PC0–PC7
PD6–PD7
Go to: www.freescale.com
Available Pins
Table 2. Memory Usage
Table 3. I/O Pin Usage
3.5 Kbytes
Available
176 bytes
PA0
PA1
PA4–PA6
PA7
PB7
PC3
PC4
PC5
PC6–PC7
PD7
Used Pins
Ext. direction
PWM output
DIP switch
Ext. start
Relay
Mains
Ext. speed
Motor current
References
Tachometer
Microcontroller Usage
Purpose
1.1 Kbytes
33 bytes
Used
Application Note
11