RC224ATL/224ATLV
3.0 Pin Descriptions
EmbeddedModem Family
Table 3-5. Hardware Interface Signal Definitions (5 of 5)
Label
I/O Type
Signal Name/Description
Modem Interconnect
RFILO
MI
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.
AGCIN
MI
MI
Receive AGC Gain Amplifier Input. See RFILO.
Mode Control. Direct modem interconnect line.
MODEO (DSP),
MODEI (IA)
TDACO (DSP),
TDACI (IA)
MI
MI
MI
MI
MI
MI
MI
Transmitter DAC Signal. Serial digital DAC signal. Direct modem interconnect line.
TSTBO (DSP),
TSTBI (IA)
Transmitter Strobe. 576 kHz digital transmitter timing reference. Direct modem interconnect
line.
TRSTO (DSP),
TRSTI (IA)
Transmitter Reset. 9.6 kHz, 8228.57 Hz, or 7.2 kHz digital transmitter timing reference.
Direct modem interconnect line.
RADCI (DSP),
RADCO (IA)
Receiver ADC Signal. Serial digital ADC signal. Direct modem interconnect line.
Receiver AGC Signal. Serial digital AGC signal. Direct modem interconnect line.
RAGCO (DSP),
RAGCI (IA)
RRSTO (DPS),
RRSTI (IA)
Receiver Reset. 9.6 kHz, 8228.57 Hz, or 7.2 kHz digital receiver timing reference. Direct
modem interconnect line.
RSTBO (DSP),
RSTBI (IA)
Receiver Strobe. 576 kHz digital receiver timing reference. Direct modem interconnect line.
D224ATLVDSC
Conexant
3-19
CONEXANT [ CONEXANT SYSTEMS, INC ]
