MFC2000 datasheet(261/426 Pages) ETC

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Hardware Description

MFC 2000 Multifunctional Peripheral Controller 2000

100723A

Conexant

13-3

GPIO10

GPIO10 is multiplexed with the PWM[4] signal, this pin is also used for

P80_PB3 as input. When P80_PB3 function is used, the direction of

this pin needs to be set as input. This pin is selected as a GPIO when

bit 7 of the GPIOConfig1 register is set to 0. The direction of this pin is

controlled by bit 10 of the GPIODir register, and the input/output value

is controlled by bit 10 of the GPIOData register.

The PWM[4] function is enabled by setting bit 7 of the GPIOConfig1

PWM section for detail.

GPIO11

GPIO11 is also used for the Calling Party Control Input (CPCIN) pin

and multiplexed with the ALTTONE output signal on pin

GPIO11/CPCIN/ALTTONE. This pin is selected as a GPIO by setting

bit 8 of the GPIOConfig1 register to 0. The direction of this pin is

controlled by bit 11 in the GPIODir register, and the input/output value

is controlled by bit 11 in the GPIOData register. The ALTTONE output

signal is selected by setting bit 8 of the GPIOConfig1 register to 1 and

setting bit 11 of the GPIODir register to 1. If this pin is used as the

CPCIN signal input pin, the bit 11 of the GPIODir register is set to 0.

In addition, the GPIO11/CPCIN/ALTTONE pin is also multiplexed with

the PWM0 signal. See the register description in the PWM section for

settings.

GPIO[14:12]

GPIO[14:12] are multiplexed with the scan/print motor power control

output signals, the RINGER output signal, and the SASIF signals on

pin GPIO14/SASRXD/RINGER, GPIO13/SASTXD/PMPWRCTRL, and

GPIO12/SASCLK/SMPWRCTRL. These pins are selected as a GPIO

by setting bit[12:9] in the GPIOConfig1 register to zero. The direction

of these pins are controlled by bit[14:12] of the GPIODir register, and

the input/output value is controlled by bit[14:12] of the GPIOData

RINGER/PMPWRCTRL/SMPWRCTRL signals by setting bit[14:9] in

the GPIOConfig1 register (refer to GPIOConfig1 register description).

Firmware needs to program GPIO[14:12] pins to use SASRXD,

SASTXD, and SASCLK for the sync mode. If the async mode of

SASIF is used, firmware only needs to program GPIO[14:13] pins to

use SASRXD and SASTXD. GPIO[12] can be still used as GPIO.

GPIO15

GPIO15 is multiplexed with SC_CLK1/2C signals, this pin is also used

as IRQ16 input. If this pin is used as IRQ16, the direction of this pin

needs to be set as input. If this pin is not used as IRQ16, the interrupt

channel 16 needs to be disabled by setting the IRQEnable register in

the Interrupt Controller.

If SC_CLK1/2C function is selected, the bit 3 of GPIOConfig2 register

must be set to 1. To enable GPIO15 function, bit 3 of GPIOConfig2

must be set to 0.

When GPIO function is enabled, the direction of this pin is controlled

by bit 15 of the GPIODir register. The GPIO15 input/output value is

controlled by bit 15 of the GPIOData register.

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