Samsung SCX-1150F Repair Manual page 43

CIRCUIT DESCRIPTION
3-11-5. FM336 FEATURES
• 2-wire half
- duplex fax modem modes with send and receive data rates up to 33600 bps.
- V.34, V.17, V.29, V.27 ter, and V.21 channel 2
- Short train option in V.17 and V.27 ter
• 2-wire full
- duplex data modem modes
- V.21, V.23 (75 bps TX/1200 bps RX or 1200 bps TX/ 75 bps RX)
• PSTN session starting
- V.8 signaling
• HDLC support at all speeds
- Flag generation, 0 bit stuffing, ITU CRC
- 16 or CRC
- 32 calculation and generation
- Flag detection, 0 bit deletion, ITU CRC
- 16 or CRC
- 32 check sum error detection
- FSK flag pattern detection during high speed receiving
• Tone modes and features
- Programmable single or dual tone generation
- DTMF receive
- Tone detection with three programmable tone detectors
• Serial synchronous data
• Parallel synchronous data
• Automatic Rate Adaptation (ARA) in V.34 Half-Duplex
• TTL and CMOS compatible DTE interface
- ITU-T V.24 (EIA/TIA-232-E) (data/control)
- Microprocessor bus (data/configuration/control)
• Receive dynamic range: 0 dBm to –43 dBm for V.17, V.33, V.29, V.27terand V.21, –9 dBm to –43 dBm for V.34 half-duplex
• Programmable RLSD turn-on and turn-off thresholds
• Programmable transmit level: 0 to -15 dBm
• Adjustable speaker output to monitor received signal
• DMA support interrupt lines
• Two 16-byte FIFO data buffers for burst data transfer with extension up to 255 bytes
• NRZI encoding/decoding
• Diagnostic capability
• +3.3V operation with +5V tolerant inputs
• +5V analog signal interface
• Typical power consumption:- Sleep mode: 20 mW
- Normal mode: 250 mWa
• 100-pin PQFP package
Repair Manual
3-40
Samsung Electronics