MFC2000 datasheet(262/426 Pages) ETC

262 / 426 page

MFC2000 Multifunctional Peripheral Controller 2000

Hardware Description

13-4

Conexant

100723A

GPIO[21:16]

GPIO[21:16] are multiplexed with six P80 modem IA signals; in

addition, GPIO19 can be used for MIRQn input signal, and GPIO20 is

further multiplexed with MCSn. Six P80 modem IA signals are

M_TXSIN, M_CLKIN, M_RXOUT, M_SCK, M_STROBE and

M_CNTRL_SIN, they are multiplexed with GPIO16 through GPIO21

respectively. The control signals of this multiplexing are EXTIA_MODE

and EXTIA_SEL, they are generated from SSD_P80. When

EXTIA_MODE is 1, the six P80Modem signals will appear on the

GPIO pins, these signals can be used to either interface to Data IA

(when EXTIA_SEL is 0) or Voice IA (when EXTIA_SEL is 1). When

EXTIA_MODE is 0, the GPIO[21:16] become GPIO and they are

controlled by GPIODir and GPIOData registers as usual except

GPIO20 can become MCSn if bit 5 GPIOConfig2 is set to 1 and

GPIO19 can be used as MIRQn input.

GPIO22

GPIO22 is multiplexed with EADC_Sample signals. If EADC_Sample

function is selected, the bit 6 of GPIOConfig2 register must be set to 1.

To enable GPIO22 function, bit 6 of GPIOConfig2 must be set to 0.

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

by bit 22 of the GPIODir register. The GPIO22 input/output value is

controlled by bit 22 of the GPIOData register.

GPIO[30:23]

GPIO[30:23] are multiplexed with PIOD[7:0] signals respectively; If

GPIO function is selected, bit 8 of GPIOConfig2 register must be set to

1, else, PIOD function is selected.

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

by bit 30-23 of the GPIODir register. The GPIO[30:23] input/output

value is controlled by bit 30-23 of the GPIOData register.

MFC2000 датащи(PDF) 262 Page - List of Unclassifed Manufacturers