Freescale Semiconductor MPC5604B - Features

MPC5604B/C Microcontroller Reference Manual, Rev. 8
Freescale Semiconductor 329
19.3 Features
The System Integration Unit Lite supports these distinctive features:
•GPIO
— GPIO function on up to 123 I/O pins
— Dedicated input and output registers for most GPIO pins
1
• External interrupts
— 2 system interrupt vectors for up to 16 interrupt sources
— 16 programmable digital glitch filters
— Independent interrupt mask
— Edge detection
• System configuration
— Pad configuration control
19.4 External signal description
Most device pads support multiple device functions. Pad configuration registers are provided to enable
selection between GPIO and other signals. These other signals, also referred to as alternate functions, are
typically peripheral functions.
GPIO pads are grouped in “ports”, with each port containing up to 16 pads. With appropriate
configuration, all pins in a port can be read or written to in parallel with a single R/W access.
NOTE
In order to use GPIO port functionality, all pads in the port must be
configured as GPIO rather than as alternate functions.
Table 19-1 lists the external pins configurable via the SIUL.
(
1.Some device pins, e.g., analog pins, do not have both input and output functionality.
Table 19-1. SIUL signal properties
GPIO[0:122]
1
category
1
GPIO[0:122] in 144-pin LQFP and 208 MAPBGA; GPIO[0:78] in 100-pin LQFP
Name
I/O
direction
Function
System configuration GPIO [0:19] [26:47] [60:122] Input/Output General-purpose input/output
GPIO [20:25] [48:59] Input Analog precise channels, low power oscillator
pins
External interrupt EIRQ[0:15]
2
2
EIRQ[12:15] available only in 144-pin LQFP
Input Pins with External Interrupt Request
functionality. Please see the signal description
chapter of this reference manual for details.