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SS1103L
Single-Chip Spread Spectrum Processor for Digital Cordless Phone
Introduction
Siliconians' SS1103L is a low-cost single-chip solution for Spread Spectrum Digital Cordless
Phones (DCP) or wireless PBXs (W-PBX) operating as FCC Part 15-compliant devices in the ISM
bands.
The SS1103L provides a very high level of integration, low power consumption and low cost suit-
able for consumer applications such as DCP. The SS1103L chip finally brings all of the advantages
of spread spectrum technology to the same price point as classical narrow band technology.
General Information
The SS1103L includes an internal 64 Kbps PCM CODEC for A/D and D/A conversions of the
audio signal and a digital signal processor for high quality ADPCM compressed voice transmission
at 32 Kbps which also performs additional voice and signal processing functions such as voice ac-
tivity detection. The chip also includes an internal 8-bit microcontroller with ROM, RAM and all
necessary peripheral functions together with a baseband spread spectrum modem.
The spread spectrum baseband modem provides a full-duplex voice link using a Time-Division-
Duplex (TDD) protocol. It provides constant monitoring of the link quality with an indication of
the relative Signal/Noise at the baseband level together with a low-speed signaling channel, inde-
pendent of the main voice channel, for communication and control between the base station and
the handset.
This low-cost spread spectrum technology makes monitoring of phone calls practically impossible
and greatly extends the range compared with other analog or digital phones operating in the ISM
bands.
The SS1103L is a 3V CMOS device and contains power-saving features, including very low bat-
tery drain in standby, for extended battery operation. It is packaged within an economic (80-pin)
surface-mounted package.
Future Product - Specifications Subject to Change
Main features
System Controller Functions:
8051-compatible 8-bit CPU
Maximum operating speed: 24 Mhz
Master clock programmable divider
32 Khz oscillator for sleep mode
On-chip 16 Kbytes ROM and 512 bytes RAM
Serial Peripheral Interface (SPI)
Asynchronous serial interface (UART)
Serial I/O (SIO)
Multiple Timers: Watch dog/sleep timer, general purpose timer/counter, time base timer
Two external interrupts
Power-on reset
Peripheral Controller Functions:
LED outputs (x4)
Keypad Interface (6x6)
Battery-Low Detect
User Functions: Pulse/DTMF dialing, Flash, memory redial, mute, voice module control
Voice and Signal Processing Functions:
PCM Codec-Filter (ITU G.711)
ADPCM Transcoder (ITU G.726)
DTMF Detection/Generation
Microphone amplifier
Sounder driver
Voice activity detection & control
Spread Spectrum Baseband Modem Functions:
High frequency oscillator
Direct sequence spread spectrum transceiver
3 bit/symbol baseband modulation
Processing Gain: 10.2 dB
Data scrambler for spectral whitening and added security
Dual-FIFO (30-byte deep each)
Voice interface module (for PCM or ADPCM)
Embedded Time-Division-Duplex (TDD) controller
MSK on-the-air modulation
Four Programmable 32-bit PN Sequences
Programmable security code
Independent low-speed signaling channel
Digital signal quality indicator output (S/N)
RF Module Interface:
Control signals for: TX/RX, transmitter power, synthesizer
Internal RSSI A/D converter
Internal DAC for gain control (transmit or receive)
Analog receiver data input with internal signal comparator/slicer
Buffered master clock output
Chip Implementation:
Very low power standby mode
Power saving features in active mode
CMOS: 3V, 3.3V, 5V, 80-pin PQFP
Availability: 2Q98
Tools:
Available 2Q98: Reference Design
Available 2Q98: DCP Firmware
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