RC56LD datasheet(10/22 Pages) CONEXANT

10 / 22 page

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Conexant

MD213

The external bus connects to OEM-supplied 1Mbit (128k x

8), 2Mbit (256k x 8), or 4Mbit (512k x 8) external

ROM/flash ROM; 32k x 8 external or internal SRAM or

1Mbit (128k x 8) external SRAM, the MDP, and the

optional RCDSVD SCP depending upon modem model

and operating mode. . For RC336 and RC144 models,

MCU internal 32k x 8 RAM can be used instead of an

external 32k x 8 RAM.

Telephone Line Interface

MCU/MCUP. For parallel host or PC Card interface,

wireline operation is selected when a DAA interface is

indicated on the DAA/CELL and DAA/GSM inputs or when

a cellular interface is indicated on the DAA/CELL input but

no analog cellular firmware driver is loaded.

Relay control outputs to the line interface are supported:

• ~RLY1: Off-hook (~OH) (~RLY1).

• ~RLY2: Voice (~VOICE), if needed. Pulse (~PULSE)

relay function can be enabled by ConfigurACE II.

• ~RLY3: Mute (~MUTE), if needed, can be enabled by

ConfigurACE II.

• ~RLY4: Caller ID (~CALLID) if needed. The DAAs

shown in Figure 4 and Figure 5 support the Caller ID

function without use of a separate relay.

Ring signal (RINGD) and loop current sense (LCS) inputs

are also supported.

Telephony extensions are supported by the Extension Off-

Hook (~EXTOH) input (MCU only).

MDP. A single-ended receive analog input (RIN) and a

differential transmit analog output (TXA1/TXA2) are

supported. A digitized speaker output (SPKMD) is

provided for call progress monitoring.

Analog Cellular Phone Interface (Parallel Host and PC

Card Interface)

MCU/MCUP. Analog cellular operation is selected when a

cellular interface is indicated on the DAA/CELL input and

a cellular firmware driver is loaded. Signals supported are

two encoded control outputs (CTRL0 and CTRL1), a

bidirectional serial data line (CELDATA), a data clock

input (CELCLK), a cellular busy output (CELBSY), and a

cellular busy input (~CELBSY).

MDP. A single-ended receive analog input (RIN) and a

differential transmit analog output (TXA1 and TXA2) are

supported.

GSM Interface (Parallel Host and PC Card Interface)

MCU/MCUP. GSM operation is selected when a GSM

interface is indicated on the DAA/GSM input. Signals

supported are: a control output (GSMCTL0), a control

input (GSMINP0), a serial transmit data output

(GSMTXD), a serial receive data input, a receive data

clock input (RXDCLK), and a transmit data clock input

(TXDCLK).

MDP. Not used in GSM operation.

Speakerphone Interface (SP Models)

Microphone input (MICV) and a speaker output (SPKM)

lines connect to handset, headset, or a microphone and

speaker to support functions such as AudioSpan headset

and speakerphone modes, FDSP, telephone emulation,

microphone voice record, speaker voice playback, and

call progress monitor. The speaker output (SPKM) carries

the normal speakerphone audio or reflects the received

analog signals in the modem.

An input from the telephone microphone (TELIN) and an

output to the telephone speaker (TELOUT) are supported

in AudioSpan modes. These lines connect voice

record/playback and AudioSpan audio to the local

handset.

RCDSVD SCP Interface (SP Models)

The Line In (LINEIN) and Line Out (LINEOUT) lines

connect DSVD audio to the local telephone handset.

Microphone input (MICIN) and speaker output (SPKP)

lines connect to the microphone and speaker to support

DSVD headset and speakerphone modes.

PC Card Interface (MCUP Only)

The host interface controls and receives status

information from the modem and the Function 2 controller

by the use of two separate sets of card configuration

registers contained in attribute memory.

The Card Information Structure (CIS) is also addressed in

attribute memory, and contains information about the PC

Card and its features.

The address decode logic controls access to the card

configuration registers in attribute memory, decodes valid

accesses to the CIS, generates chip selects to the

Ethernet controller and to the modem, and generates the

input acknowledge signal (-INPACK) to the host.

The 512-byte CIS table physically resides in the MCUP.

The CIS table provides the host with PC Card specific

information including card type, address range decoding

capability, and control requirements to complete host link

establishment with the PC Card.

Supported interface signals to the Function 2 controller

are chip select (~CH2CS), power down (~PWRDWN2),

reset (~RESOUT2), disable EEPROM (~DISEEP), A0

data bit (A0OUT), and 16-bit data select (~IO16E). An

interrupt input (~IREQ2) from the Function 2 controller is

also supported.

Address inputs (HA0-HA4) and bidirectional data bus lines

(HD0-HD15) from the PC Card Connector connect directly

to the Function 2 controller to support data transfer

between the Function 2 controller and the host. In

addition, host read (~IORD), host write (~IOWR), chip

select (~CE2), and I/O channel ready (IOCHRDY) signals

connect directly from the PC Card Connector to the

Function 2 controller.]

RC56LD Datasheet(PDF) 10 Page - Synaptics Incorporated.

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