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)
ELAN [ ELAN MICROELECTRONICS CORP ]
