r6781-12 Conexant Systems, Inc., r6781-12 Datasheet - Page 45

• Manufacturer Part Number: r6781-12
• Description: Embedded Modem Family
• Manufacturer: Conexant Systems, Inc.

EmbeddedModem Family
Table 3-5. Hardware Interface Signal Definitions (5 of 5)
D224ATLVDSC
RFILO
AGCIN
MODEO (DSP),
MODEI (IA)
TDACO (DSP),
TDACI (IA)
TSTBO (DSP),
TSTBI (IA)
TRSTO (DSP),
TRSTI (IA)
RADCI (DSP),
RADCO (IA)
RAGCO (DSP),
RAGCI (IA)
RRSTO (DPS),
RRSTI (IA)
RSTBO (DSP),
RSTBI (IA)
Label
MI
MI
MI
MI
MI
MI
MI
MI
MI
MI
I/O Type
Receive Filter Output. RFILO is the output of the internal receive anti-aliasing filter which
must be connected to AGCIN through a 0.1 µF, 20%, DC decoupling capacitor. The 1000 pF
capacitor to ground provides noise immunity at low noise levels.
Receive AGC Gain Amplifier Input. See RFILO.
Mode Control. Direct modem interconnect line.
Transmitter DAC Signal. Serial digital DAC signal. Direct modem interconnect line.
Transmitter Strobe. 576 kHz digital transmitter timing reference. Direct modem interconnect
line.
Transmitter Reset. 9.6 kHz, 8228.57 Hz, or 7.2 kHz digital transmitter timing reference.
Direct modem interconnect line.
Receiver ADC Signal. Serial digital ADC signal. Direct modem interconnect line.
Receiver AGC Signal. Serial digital AGC signal. Direct modem interconnect line.
Receiver Reset. 9.6 kHz, 8228.57 Hz, or 7.2 kHz digital receiver timing reference. Direct
modem interconnect line.
Receiver Strobe. 576 kHz digital receiver timing reference. Direct modem interconnect line.
Modem Interconnect
Conexant
Signal Name/Description
3-19