General Description - 3Jtech uModem Technical Document

3JTech 56K USB modem solution _ uModem
Single chip ZD1051 integrates DSP, controller and USB interface
Power management chip ZD1056 supports USB bus-powered design
Features
Data mode
●
- ITU-T V.90 / V.34 (33.6K) / V.32b / V.32 /
V.22b / V.22 / V.23 / V.21
- Bell 212A/ Bell 103
- Error correction: ITU-T V.42 and MNP3,4
- Data compression: ITU-T V.42b and MNP5
- Industry standard AT command sets
- Caller ID
FAX mode
●
- ITU-T V.17/ V.29/ V27ter up to 14.4K bps
- TIA class1/ 2/ 2.0 fax command sets
● USB features
- USB specification 1.1 compliant
- power management: bus-powered, suspend
mode supported
- full speed 12 Mbps
● System compatibility
- Microsoft Windows 98 and Windows 2000
- Macintosh MacOS.9.0
Voice features
●
- Voice compression : 4-bit ADPCM
- TIA IS-101 voice command set
- TAM function
World wide homologation
●
- FCC Part 68/ CTR21 versions
- Programmable PTT parameters
Electrical characteristics
●
- ZD1051
Package: 128-pin TQFP, 3.3V/1.8V dual power
mode, 3.3V for I/O pad and 1.8V for core
operation
USB Bus
ROM
256Kx16
(FEPROM/
MROM)
Figure 1. 3JTech USB modem simplified diagram
2003/6 From 3JTech

General Description

The highly-integrated ZD1051 56K USB modem
chip uses only one DSP core, embedded in the
ZD1051, to handle both the signal and protocol
processing. No controller is needed for modem
protocol handling. This kind of integration not only
shrinks the modem chipset into a single chip but
also improves hardware reliability and reduces the
power consumption. An extremely small 128-pin
TQFP package, 16x16 mm square, is easily fitted to
any critical PCB design. The power dissipation of
ZD1051 is less than 220 mW, ZD1051 is suitable for
power-sensitive portable applications.
This solution also adopts the latest silicon DAA
technology with programmable characteristics; this
makes it possible to meet the world wide PTT
certifications using a single hardware.
ZyDAS USB modem solution is the best choice for
designing a 56K USB external modem.
Applications
USB external modem for Internet access
●
USB external modem for Internet games (PS2)
●
Solutions
ZyDAS ZD1051 USB 56K modem data pump
●
ZyDAS ZD10591 USB 56K modem ROM code
●
(optional)
Silicon Lab Si3034/Si3035 silicon DAA
●
ZyDAS 56K
Modem Data Pump
ZD1051
128-Pin TQFP
SRAM EEPROM
64Kx16 2K bits
Revision 1.0
Research & Development
Silicon DAA
Si3034 /
Si3035
Telephone Line
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