W925EP01 datasheet(2/108 Pages) WINBOND

2 / 108 page

W925EP01/ W925EP01FG

- 2 -

1. GENERAL 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.

That 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 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.

2. FEATURES

• CPU: 8-bit micro-controller is similar to the 8051 family.

- Flash EPROM type (E version) operating voltage:

µC: The µC 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.

Note: ”CPE*” Customer Premises Equipment

W925EP01 Datasheet(PDF) 2 Page - Winbond

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