mcf51ac256a Freescale Semiconductor, Inc, mcf51ac256a Datasheet - Page 400

• Manufacturer Part Number: mcf51ac256a
• Description: Mcf51ac Flexis
• Manufacturer: Freescale Semiconductor, Inc

Rapid GPIO (RGPIO)
17.1.2
The major features of the RGPIO module providing 16 bits of high-speed general-purpose input/output
are:
17-2
•
•
Small memory-mapped device connected to the processor’s local bus
— All memory references complete in a single cycle to provide zero wait-state responses
— Located in processor’s high-speed clock domain
Simple programming model
— Four 16-bit registers, mapped as three program-visible locations
– Register for pin enables
– Register for controlling the pin data direction
– Register for storing output pin data
– Register for reading current pin state
RGPIO
module
Features
rgpio_enable
MCF51AC256 ColdFire Integrated Microcontroller Reference Manual, Rev. 5
31
16
Pin Enables
rgpio_direction
Pin Muxing + Pad Logic
31
mux
Figure 17-1. RGPIO Block Diagram
16
31
16
Direction
RGPIO[15:0]
rgpio_data_out
15
0
Write D ata
31
0
15
decode
31
data to module
data from module
rgpio_data_in
0
Control
0
Read D ata
Freescale Semiconductor
address
Local Bus