GENERAL DESCRIPTION
The Winbond Caller Identification device W91031, is a low power CMOS integrated circuit used to receive physical layer signals transmitted according to Bellcore and British Telecom (BT) specifications. There are two types of Caller Identifications, the first type is on-hook calling with caller ID message and the second type is call on waiting. The line reversal for BT, ring burst for CCA or ring signal for Bellcore can be detected by the ring detector. There are two modes of FSK data output interface. The first mode is a data transfer activated by the device, whose clock and data change depending upon the changing frequency of the FSK analog signal input. The second mode allows a microcontroller to extract 8-bit data from the device serially; the device notifies the micro-controller when 8-bit data has been received. Note: "CPE*" Customer Primises Equipment FEATURES
AND APPLICATIONS
FEATURES
● Compatible with Bellcore TR-NWT-000030 & SR-TSV-002476, British Telecom (BT) SIN227, U.K.
Winbond Electronics Corporation
