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W925EP01

Features: • CPU: 8-bit micro-controller is similar to the 8051 family.- Flash EPROM type (E version) operating voltage:C: The C operating voltage is from 2.4 to 5.5V. The ISP operating voltage is from 3.3 to5.5V.CID: The CID receiver operating voltage is from 3.0 to 5.5V.• Dual-clock o...

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SeekIC No. : 004545318 Detail

W925EP01: Features: • CPU: 8-bit micro-controller is similar to the 8051 family.- Flash EPROM type (E version) operating voltage:C: The C operating voltage is from 2.4 to 5.5V. The ISP operating voltage...

W925EP01 Data Sheet

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Part Number:
W925EP01
Supply Ability:
5000

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  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

• CPU: 8-bit micro-controller is similar to the 8051 family.
- Flash EPROM type (E version) operating voltage:
C: The C operating voltage is from 2.4 to 5.5V. The ISP operating voltage is from 3.3 to
5.5V.
CID: The CID receiver operating voltage is from 3.0 to 5.5V.
• Dual-clock operation:
- Main oscillator: Connect with 4M/8MHz crystal, built-in RC oscillator for clock stable from
main crystal wake up.
- Sub oscillator: connect with 32768Hz crystal.
- Main and sub oscillators are enabled/disabled by bit control individually.
• ROM:
- 64K bytes of in-system-programmable Flash EPROM for application program (APROM).
- 4K bytes of auxiliary Flash EPROM for loader program (LDROM).
- 64K bytes external program memories address space.
• RAM:
- 256 bytes on chip scratch pad RAM.
- 4K bytes on chip RAM for MOVX instruction.
- 64K bytes external data memories address space.
• 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 generator/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.


Pinout

Connection Diagram


Specifications

PARAMETER SYMBOL RATING UNITS
1 Supply Voltage with respect to VSS VDD -0.3 to 6 V
2 Voltage on any pin other than supplies (note 1) -0.7 to VDD + 0.7 V
3 Current at any pin other than supplies 0 to 10 mA
4 Storage Temperature Tst -65 to 150

Note:
*. Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the lift and reliability of the device.
1. VDD + 0.7 should not excess maximum rating of supply voltage.




Description

The W925EP01 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.
W925EP01 contains a 64K bytes of main Flash EPROM (APROM) and a 4K bytes of auxiliary Flash EPROM (LDROM) which allows the contents of the 64KB main Flash EPROM (APROM) to be updated by the loader program located at the 4KB auxiliary Flash EPROM (LDROM).

W925EP01 can be extend to two 64KB program banks, there are APROM (00000H~0FFFFH) and external program ROM (10000H~1FFFFH), user can access the external ROM by P5, P6, P7, A16 andPSEN . All instructions are fetched for execution from this memory areas, the MOVC instruction can also access the external memory regions.

The CID W925EP01 part consisted of FSK decoder, DTMF receiver, CPE* Alert Signal (CAS) detector and Ring detector. Also are built-in DTMF generator, FSK generator with baud rate 1200 bps (bits/sec) and CAS generator.

Using W925EP01 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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