56F8366 datasheet(22/184 Pages) FREESCALE

22 / 184 page

56F8366 Technical Data, Rev. 6

Freescale Semiconductor

Preliminary

GPIOB0

(A16)

Schmitt

Input/

Output

Input,

pull-up

enabled

Port B GPIO — This GPIO pin can be programmed as an input or

output pin.

Address Bus — A16 specifies one of the address lines for

external program or data memory accesses.

Depending upon the state of the DRV bit in the EMI bus control

external bus is inactive.

Most designs will want to change the DRV state to DRV = 1 instead of

using the default setting.

After reset, the startup state of GPIOB0 (GPIO or address) is

determined as a function of EXTBOOT, EMI_MODE and the Flash

security setting. See Table 4-4 for further information on when this

pin is configured as an address pin at reset. In all cases, this state

may be changed by writing to GPIOB_PER.

To deactivate the internal pull-up resistor, set bit 0 in the

GPIOB_PUR register.

(GPIOF9)

Input/

Output

Input/

Output

In reset,

output is

disabled,

pull-up is

enabled

Data Bus — D0 - D6 specify part of the data for external program or

data memory accesses.

Depending upon the state of the DRV bit in the EMI bus control

inactive.

Most designs will want to change the DRV state to DRV = 1 instead of

using the default setting.

Port F GPIO — These seven GPIO pins can be individually

programmed as input or output pins.

At reset, these pins default to the EMI Data Bus function.

To deactivate the internal pull-up resistor, set the appropriate

GPIO bit in the GPIOF_PUR register.

Example: GPIOF9, set bit 9 in the GPIOF_PUR register.

(GPIOF10)

(GPIOF11)

(GPIOF12)

(GPIOF13)

(GPIOF14)

(GPIOF15)

Table 2-2 Signal and Package Information for the 144-Pin LQFP

Signal Name

Pin No.

Type

State

During

Reset

Signal Description

56F8366 Datasheet(PDF) 22 Page - Freescale Semiconductor, Inc

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