
W925E/C625
8-bit CID Microcontroller
Revision : A6
-3-
Release Date : 2002/7/2
1
The W925E/C625 is an all-in-1
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 consists 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/C625 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.
GENERAL DESCRIPTION
2
APPLICATION
: The
SMS
phone with CID function and CID adjunct box.
CPU
: 8-bit micro-controller is similar to the 8051 family.
- Operating voltage:
μ
C: 2.2 to 5.5 volt.
CID: 3.0 to 5.5 volt.
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
: 64K bytes internal flash EEPROM/MASK ROM type.
- up 64K bytes for program ROM.
- total 64K bytes for look-up table ROM.
RAM
:
- 256 bytes on chip scratch-pad RAM.
- 4K bytes on chip RAM for MOVX instruction.
- 224 bytes on chip LCD RAM.
LCD
: dot matrix control method.
- 1792 dots: 56 Segments x 32 Common, 1/5 bias.
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;
DTMF receiver can be programmed as a tone detector.
- 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.
I/O
: 40 I/O pins.
- P0: Bit and byte addressable. I/O mode can be bit controlled. Open drain type.
- P1~P3: Bit and byte addressable. Pull high and I/O mode can be bit controlled.
- P4 : Byte addressable . Pull high and I/O mode can be bit controlled.
note: ”CPE*” Customer Premises Equipment
FEATURES