RH56D-PCI データシートの表示（PDF） - Unspecified

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RH56D-PCI

Host-Controlled V.90/K56flex™ Modem device Family for Desktop Applications

Unspecified 

Label

Pin

OH#

104

(GPIO0)

CID#

103

(GPIO1)

VOICE#

102

(GPIO2)

RINGWAKE#

106

(INPUT 0)

IRING#

110

(INPUT3)

LCS#

108

(INPUT2)

LCS_L#/RH_L# 112

(INPUT 5)

EXT_L#

111

(INPUT4)

SPKMUTE

100

(GPIO8)

RXA

66

TXA1

61

TXA2

62

SPKOUT

60

DSPKOUT

69

RH56D-PCI Modem Designer’s Guide

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I/O Type

Signal Name/Description

TELEPHONE LINE (DAA)/AUDIO INTERFACE

Ot12

Off-Hook Relay Control. Output (typically active low) used to control the normally

open off-hook relay. The polarity of this output is configurable.

Ot12

Caller ID Relay Control. Output (typically active low) used to control the normally open

Caller ID relay. The polarity of this output is configurable.

Ot12

Voice Relay Control. Output (typically active low) used to control the normally open

voice relay. The polarity of this output is configurable.

It

Ring Wakeup. Not used. Connect to +3.3V through 10K Ω.

Itpu

Itpu

Itpu

Itpu

It/Ot12

I(DA)

O(DF)

O(DF)

OA

Ring Indicate. A low-going edge used to indicate presence of a ring frequency.

Typically connected to the output of an optoisolator or equivalent. The idle state (no

ringing) output of the ring detect circuit should be high.

Line Current Sense Handset. Active low input used to indicate local modem handset

off-hook status.

Remote Hang-up. Active low input used to indicate hang-up of the remote modem or

telephone, i.e., the remote modem/telephone has released the line (gone on-hook).

Extension Offhook. Active low input used to indicate the telephone line is in use by

the local handset or an extension phone.

Speaker Mute/Vaux Mode Power Select. Output (typically active low) used to turn off

(mute) the speaker during normal operation.

Upon device reset, this pin is temporarily an input and is sampled. If sampled high and

VauxDET is high, VpciEN# will be asserted when the device is in D0. If sampled low

(e.g., SPKMUTE signal is pulled down to GND through 10k Ω) and VauxDET is high,

VauxEN# will be asserted when the device is in D0. VauxEN# is always asserted when

VauxDET is high in D3 with PME enabled. Either VauxEN# or VpciEN#, but not both,

can be asserted at the same time.

Receive Analog. RXA is a single-ended receive data input from the telephone line

interface or an optional external hybrid circuit. The input impedance is > 70k Ω.

Transmit Analog 1 and 2. The TXA1 and TXA2 outputs are differential outputs 180

degrees out of phase with each other. Each output can drive a 300 Ω load.

Modem Speaker Analog Output. The SPKROUT_M analog output reflects the

received analog input signal. The SPKROUT_M on/off and three levels of attenuation

are controlled by bits in DSP RAM. When the speaker is turned off, the SPKROUT_M

output is clamped to the voltage at the VC pin. The SPKROUT_M output can drive an

impedance as low as 300 ohms. In a typical application, the SPKROUT_M output is an

input to an external LM386 audio power amplifier.

Modem Speaker Digital Output. The DSPKOUT digital output reflects the received

analog input signal digitized to TTL high or low level by an internal comparator to

create a PC Card (PCMCIA)-compatible signal.

1213

Conexant

3-9

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