ST70137 Ver la hoja de datos (PDF) - STMicroelectronics

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Fabricante

ST70137

UNICORN™ PCI & USB CONTROLLERLESS ADSL DMT TRANSCEIVER

STMicroelectronics 

ST70137

PIN DESCRIPTION (continued)

Signal Name Direction Init Status Polarity

Signal Description

CLOCK & RESET INTERFACE

MCLK

RSTN

I

I

I

I

AFE INTERFACE

AFETXD[3:0]

O

L

AFERXD[3:0]

I

I

CLWD

I

I

CTRLDOUT

AFESEL

AFERST

O

H

I

I

O

L

AFEWR / GPIO[ 5]

I/O

I

CTRLDIN / GPIO[4]

I

I

SUSPEND

SUSPENDN

PWDN

LDPWDN

O

L

O

H

O

H

O

H

-

35.328 MHz Master Input Clock.

L

Asynchronous Master Input Reset (active if

USB_PCI_SEL = ‘1’).

-

AFE Transmit Data Nibble Bus

The signal changes are synchronized to the rising edge of

MCLK clock signal.

-

AFE Receive Data Nibble Bus

The signal changes are synchronized to the rising edge of

MCLK clock signal.

H

Start of word indication

This signal is the word clock used to enable shift of data.

It occurs on CTRLDOUT signal to indicate the first data of

the nibble sequence. The CLWD frequency is equal to

MCLK/4.

L

Transmit Control Word Data to AFE

The data is shifted out from internal register on the rising

edge of MCLK during CLWD assertion.

-

Select ST-70136 [0] or ADSL_C [1].

L

AFE Reset

This signal is connected to the internal PCFW

(USB_PCIN_SEL = [0]) or UCFW registers

(USB_PCIN_SEL = [1]) if AFESEL = [0], or to the Sachem

GPOUT register if AFESEL = [1]. Not usable in USB

mode.

L/-

AFE Write control output signal (AFESEL = 0), or Gen-

eral Purpose I/O pin. The selection is performed writing

the proper bit in the PCFW or UCFW (depending on sta-

tus of USB_PCIN_SEL pin) registers. At the power-on or

hardware reset the GPIO[5] function is selected.

L/-

Receive Control word data from AFE (AFESEL = 0), or

General Purpose I/O pin. The selection is performed writ-

ing the proper bit in the PCFW or UCFW (depending on

status of USB_PCIN_SEL pin) registers. At the power-on

or hardware reset the GPIO[4] function is selected ACTD I

I H Activation Tone Detect [1] (or Wake Up signal).

When PCI IF has been selected, the Low to High transi-

tion of ACTD asserts the PCI_PMEN signal (if this last

has been enabled) and generates an interrupt event.

When USB IF has been selected, the Low to High transi-

tion of ACTD de-asserts the SUSPEND signal and

re-enable the internal ST70137 activity.

H

Suspend Mode Indication.

L

Suspend Mode Indication Negated.

H

AFE Power Down.

H

Line Driver Power Down [1].

12/22

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