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W925E240

Features: ` APPLICATION: The SMS phone with CID function and CID adjunct box.` CPU: 8-bit micro-controller is similar to the 8051 family.- Operating voltage: 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 ...

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SeekIC No. : 004545316 Detail

W925E240: Features: ` APPLICATION: The SMS phone with CID function and CID adjunct box.` CPU: 8-bit micro-controller is similar to the 8051 family.- Operating voltage: C: 2.2 to 5.5 volt. CID: 3.0 to 5.5 vol...

W925E240 Data Sheet

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Part Number:
W925E240
Supply Ability:
5000

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  • Processing time
  • 15 Days
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Product Details

Description



Features:

` APPLICATION: The SMS phone with CID function and CID adjunct box.
` CPU: 8-bit micro-controller is similar to the 8051 family.
- Operating voltage:   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: 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; 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
` Power mode:
- Normal mode: Normal operation.
- Dual-clock slow operation mode: System is operated by the sub-oscillator (Fosc=Fs and Fm is stopped)
- Idle mode: CPU hold. The clock to the CPU is halted, but the interrupt, timer and watchdog timer block work normally but CID function is disabled.
- Power down mode: All activity is completely stopped and power consumption is less than 1 A.
` Timer: 2 13/16-bit timers, or 8-bit auto-reload timers, that are Timer0 and Timer1.
` Watchdog timer: WDT can be programmed by the user to serve as a system monitor.
` Interrupt: 11 interrupt sources with two levels of priority.
- 4 interrupts from INT0, INT1, INT2 and INT3.
- 2 interrupts from Timer0, Timer1.
- 1 interrupt from Serial port.
- 1 interrupt from CID.
- 1 interrupt from 13/14-bit Divider.
- 1 interrupt from Comparator.
- 1 interrupt from Watch Dog Timer.
` Divider: 13/14 bit divider, clock source from sub-oscillator, therefore, DIVF set every 0.25/0.5 second.
• Comparator:
- Comparator: 1 analog inputs from VNEG pin, 2 reference input pins, one is from VPOS pin and another is from internal regulator output.
• Serial port:
- An 8-bit serial transceiver with SCLK and SDATA.
.• Package:
- 100pin QFP


Pinout

Connection Diagram


Description

The W925E/C240 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 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/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.




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