Datasheet

56F8366 Technical Data, Rev. 7

126 Freescale Semiconductor

Preliminary

Two Input/Output pins associated with GPIOD can function as GPIO, EMI (default peripheral) or CAN2

(NOT available in the 56F8166 device) signals. GPIO is the default and is enabled/disabled via the

GPIOD_PER, as shown in Figure 6-11 and Table 6-3. When GPIOD[1:0] are programmed to operate as

peripheral input/output, then the choice between EMI and CAN2 inputs/outputs is made here in the GPS.

Figure 6-11 Overall Control of GPIOD Pads Using SIM_GPS Control

Note: CAN2 is NOT available in the 56F8166 device.

Table 6-3 Control of GPIOD Pads Using SIM_GPS Control

1. This applies to the two pins that serve as EMI CSn / CAN2 / GPIOD functions. A separate set of control

bits is used for each pin.

Pin Function

Control Registers

Comments

GPIOD_PER

GPIOC_DDR

SIM_GPS

GPIO Input 0 0 —

GPIO Output 0 1 —

EMI I/O 1 — 0 EMI CSn

pins are always outputs

CAN2 1 — 1 CAN2_TX is always an output

CAN2_RX is always an input

GPIOD_PER Register

GPIO Controlled

I/O

Pad Control

SIM_ GPS Register

EMI Controlled

CAN2 Controlled