PXD10RM Datasheet, PDF (1197/1332 Pages) Freescale Semiconductor, Inc – PXD10 Microcontroller

37.3 Features
The SIUL supports these distinctive features:
• GPIO
— GPIO function on up to 133 I/O pins
— Dedicated input and output registers for each GPIO pin
• External interrupts
— 2 system interrupt vectors for up to 14 interrupt sources
— 14 programmable digital glitch filters
— Independent interrupt mask
— Edge detection
• System configuration
— Pad configuration control
37.4 External signal description
The pad configuration allows flexible, centralized control of the pin electrical characteristics of the MCU
with the GPIO control providing centralized general purpose I/O for an MCU that multiplexes GPIO with
other signals at the I/O pads. These other signals, or alternate functions, will normally be the peripherals
functions. The internal multiplexing allows user selection of the input to chip-level signal multiplexors.
Each GPIO port communicates via 16 I/O channels. In order to use the pad as a GPIO, the corresponding
Pad Configuration Registers (PCR) for all pads used in the port must be configured as GPIO rather than
as the alternate pad function.
Table 37-1 lists the external pins used by the SIUL.
Table 37-1. SIUL signal properties
External IRQ
IRQ_0
Flag
EIF[0]
EIF[1]
EIF[2]
EIF[3]
EIF[4]
EIF[5]
EIF[6]
EIF[7]
PCR
PCR[1]
PCR[8]
PCR[9]
PCR[16]
PCR[18]
PCR[27]
PCR[29]
PCR[71]
Port
PA[1]
PA[8]
PA[9]
PB[0]
PB[2]
PB[11]
PB[13]
PF[1]
Package
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x
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x
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x
x
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x
Freescale Semiconductor
PXD10 Microcontroller Reference Manual, Rev. 1
Preliminary—Subject to Change Without Notice
37-3