W925E240 Datasheet, PDF (2/73 Pages) Winbond – 8-BIT CID MICROCONTROLLER

W925E/C240
1. GENERAL DESCRIPTION
The W925E/C240 is an all in one single 8-bit micro-controller with widely used Calling Identity Delivery
(CID) function. The 8-bit CPU core is based on the 8051 family; therefore, all the instructions are
compatible to the Turbo 8051 series. The CID part consisted of FSK decoder, DTMF receiver, CPE*
Alert Signal (CAS) detector and Ring detector. Also built-in DTMF generator and FSK generator with
baud rate 1200 bps (bits/sec). Using W925E/C240 can easily implement the CID adjunct box and the
feature phone or Short Message Service (SMS) phone with CID function. The main features are listed
in the next section.
2. FEATURES
• APPLICATION: The SMS phone with CID function and CID adjunct box.
• CPU: 8-bit micro-controller is similar to the 8051 family.
− EEPROM type(E version) operating voltage:
µC: Depend on the operating vol. option. Either 2.4 to 3.6V or 3.0 to 5.5V for operating. If 2.4 to
3.6V be selected, the µC operating range is from 2.4 to 3.6V, else if 3.0 to 5.5V be selected,
the µC operating range is from 3.0 to 5.5V.
CID: 3.0 to 5.5V.
− MASK type(C version) operating voltage:
µC: 2.2 to 5.5V.
CID: 3.0 to 5.5V.
• Dual-clock operation:
− Main oscillator: 3.58MHz crystal for CID and DTMF function. And built-in RC oscillator.
− Sub oscillator: 32768Hz crystal.
− Main and sub oscillators are enable/disable by bit control individually.
• ROM: 256K bytes internal flash EEPROM/MASK ROM type.
− Up 128K bytes for program ROM.
− Total 256K bytes for look-up table ROM.
− Separate 256K into 4 pages, each page is 64K addressable.
• RAM:
− 256 bytes on chip scratch-pad RAM.
− 8K bytes on chip RAM for MOVX instruction.
• CID
− Compatible with Bellcore TR-NWT-000030 & SR-TSV-002476, British Telecom(BT) SIN227, U.K.
Cable Communication Association(CCA) specification.
− FSK modulator/demodulator: for Bell 202 and ITU-T V.23 FSK with 1200-baud rate.
− CAS detector: for dual tones of Bellcore CAS and BT Idle State and Loop State Dual Tone Alert
Signal (DTAS).
− DTMF generator/receiver;
− Ring detector: for line reversal for BT, ring burst for CCA or ring signal for Bellcore.
− Two independent OP amps with adjustable gain for Tip/Ring and Telephone Hybrid connections.
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