W6694CD WINBOND [Winbond], W6694CD Datasheet - Page 4

• Manufacturer Part Number: W6694CD
• Description: USB Bus ISDN S/T-Controller
• Manufacturer: WINBOND [Winbond]

1. GENERAL DESCRIPTION
The Winbond's single chip USB bus ISDN S/T interface controller W6694 is an all-in-one device
suitable for ISDN Internet access. The integrated USB and ISDN design provides low cost, pure
passive solution for USB-IDSN application.
W6694 also provides two PCM CODEC interfaces for the ability to access ISDN through voice
channel.
2. FEATURES
ISDN
USB
Other Features
Full duplex 2B+D S/T-interface transceiver compatible with ITU-T I.430 Recommendation
Transparent data transmission of 2B+D channels
Test functions
USB Specification version 1.0/1.1 compliant
Full-speed, bus-powered USB device
Integrated transceiver, PLL, SIE, SIL and voltage regulator
Built-in fully automatic enumeration procedure
Support suspend mode
GCI bus interface (slave mode) for connecting to ISDN U transceiver chip.
PCM port provides two 64K clear channels to connect to PCM CODEC chips.
B channel data switching function for selective connection between ISDN/GCI interface, USB and
PCM.
EEPROM interface for retrieving customized USB device identification data.
IO pins with LED current drive capability.
Reset pin for whole-chip reset.
Four wire operation
Received clock recovery
Layer 1 activation/deactivation procedure
D channel access control
Suspend current requirement
Wake-up by ISDN (remote) and PC (host)
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Preliminary W6694