56F8035 datasheet(97/161 Pages) FREESCALE

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56F8035/56F8025 Data Sheet, Rev. 6

Freescale Semiconductor

Figure 6-18 Overall Control of Signal Source Using SIM_GPSnn Control

In some cases, the user can choose peripheral function between several I/O, each of which have the option

to be programmed to control a specific peripheral function. If the user wishes to use that function, only one

of these I/O must be configured to control that peripheral function. If more than one I/O is configured to

control the peripheral function, the peripheral output signal will fan out to each I/O, but the peripheral input

signal will be the logical OR and AND of all the I/O signals.

Complete lists of I/O muxings are provided in Table 2-3.

The GPSn setting can be altered during normal operation, but a delay must be inserted between the time

when one function is disabled and another function is enabled.

Note:

After reset, all I/O pins are GPIO, except the JTAG pins and the RESET pin.

Figure 6-19 GPIO Peripheral Select Register 0 for GPIOA (SIM_GPSA0)

6.3.16.1

Reserved—Bits 15–13

This bit field is reserved. Each bit must be set to 0.

6.3.16.2

Configure GPIOA6 (GPS_A6)—Bit 12

This field selects the alternate function for GPIOA6.

•

0 = FAULT0 - PWM FAULT0 Input (default)

•

1 = TA0 - Timer A0

6.3.16.3

Configure GPIOA5 (GPS_A5)—Bits 11–10

This field selects the alternate function for GPIOA5.

•

00 = PWM5 - PWM5 (default)

Base + $13

Read

GPS_A6

GPS_A5

GPS_A4

Write

RESET

00000000

0000

GPIOA6_PEREN

GPIOA6

GPIOA6 pin

SIM_GPSA0

PWM

FAULT0

Timer A0

56F8035 Datasheet(PDF) 97 Page - Freescale Semiconductor, Inc

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