EM78815 데이터 시트보기 (PDF) - ELAN Microelectronics

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EM78815

8 Bit Microcontroller

ELAN Microelectronics 

EM78815

8-Bit Microcontroller

2.2 Serial Transmitter/Receiver Interface

„ Serial Peripheral Interface (SPI): Interrupt flag available for the read buffer full,

Programmable baud rates of communication, Three-wire synchronous

communication (shared with IO)

„ Universal asynchronous receiver transmitter interface. User can select (7/8/9

bits) with/without parity bit, Baud rate setting and error detection function.

Interrupt available for RX buffer full or TX buffer empty. Two wire asynchronous

communication (shared with IO)

2.3 Current D/A

„ Operating Voltage: 2.5V~3.6V

„ 10-bit resolution and 3-bit output level control

„ Current DA output can drive the speaker through a transistor for sound playing.

(shared with IO)

2.4 Programmable Tone Generators

„ Operating Voltage: 2.2V~3.6V

„ Programmable Tone 1 and Tone 2 generators

„ Independent single tone generation for Tone 1 and Tone 2

„ Mixed dual tone generation by Tone 1 and Tone 2 with 2dB difference

„ Can be programmed for DTMF tone generation

„ Can be programmed for FSK signal (Bell202 or V.23) generation

2.5 CID

„ Operating Voltage: 2.4V~3.6V for FSK

„ Operating Voltage: 2.4V~3.6V for DTMF receiver

„ Compatible with Bellcore GR-30-Core (formerly as TR-NWT-000030)

„ Compatible with British Telecom (BT) SIN227 & SIN242

„ FSK demodulator for Bell 202 and ITU-T V.23 (formerly as CCITT V.23)

„ Differential Energy Detector (DED) for line energy detection

2•

Product Specification (V2.4) 02.17.2006

(This specification is subject to change without further notice)

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