5&/'5&/'DQG5&/'
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,
10
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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.]
Conexant
MD213
CONEXANT [ CONEXANT SYSTEMS, INC ]
