mpc823rg Freescale Semiconductor, Inc, mpc823rg Datasheet - Page 927

• Manufacturer Part Number: mpc823rg
• Description: Mpc823 Powerquicc Integrated Communications Processor For Portable Systems
• Manufacturer: Freescale Semiconductor, Inc

16.14.1 Features
The following is a list of the parallel I/O port’s main features:
16.14.2 Port A Pin Functionality
The 12 port A pins are independently configured as general-purpose I/O pins if the
corresponding bit in the port A pin assignment register (PAPAR) is cleared. On the other
hand, each pin is configured as a dedicated on-chip peripheral pin if the corresponding
PAPAR bit is set. When the port A pin is configured as a general-purpose I/O pin, the signal
direction for that pin is determined by the corresponding control bit in the port A data
direction register (PADIR). The port A pin is configured as an input if the corresponding
PADIR bit is cleared and configured as an output if the corresponding bit is set. All PAPAR
and PADIR bits are cleared at system reset, which configures all port A pins as
general-purpose input pins.
• Port A is 12 Bits
• Port B is 16 Bits
• Port C is 12 Bits
• Port D is 13 Bits
• All Ports are Bidirectional
• All Ports have Alternate On-Chip Peripheral Functions
• All Ports are Three-Stated at System Reset
• All Pin Values can be Read while the Pin is Connected to an On-Chip Peripheral
• Ports A and B have Open-Drain Capability
• Port C has 12 Interrupt Input Pins
Freescale Semiconductor, Inc.
For More Information On This Product,
MPC823 REFERENCE MANUAL
Go to: www.freescale.com
Communication Processor Module
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