EM78P911A Datasheet | ELAN Microelectronics

Description The EM78P911A is an 8-bit CID (Call Identification) RISC type microprocessor with low power , high speed CMOS technology . Integrated onto a single chip are on_chip watchdog (WDT) , RAM , ROM , programmable real time clock /counter , internal interrupt , power down mode , LCD driver , FSK decoder ,CALL WAITING decoder, SDT decoder, DTMF generator, MEI(Multiple Extension Internetworking) and RTF(Request To Flash) functions, and tri-state I/O . The EM78P911A provides a single chip solution to design a CID of calling message_display . II.Feature CPU ¡E Operating voltage range : 2.5V¡ã 5.5V ¡E 16K¡Ñ 13 on chip Electrical One Time Programmable Read Only Memory (OTP-ROM) ¡E 2.8K¡Ñ 8 on chip RAM ¡E Up to 36 bi-directional tri-state I/O ports ¡E 8 level stack for subroutine nesting ¡E 8-bit real time clock/counter (TCC) ¡E Two sets of 8 bit counters can be interrupt sources ¡E Selective signal sources and trigger edges , and with overflow interrupt ¡E Programmable free running on chip watchdog timer ¡E 99.9¢H single instruction cycle mands ¡E Four modes (internal clock 3.579MHz) 1. Sleep mode : CPU and 3.579MHz clock turn off, 32.768KHz clock turn off 2. Idle mode : CPU and 3.579MHz clock turn off, 32.768KHz clock turn on 3. Green mode : 3.579MHz clock turn off, CPU and 32.768KHz clock turn on 4. Normal mode : 3.579MHz clock turn on , CPU and 32.768KHz clock turn on ¡E Ring on voltage detector ¡E Universal Low battery detector ¡E Input port wake up function ¡E 9 interrupt source , 4 external , 5 internal ¡E 100 pin QFP or chip ¡E Port key scan function ¡E Clock frequency 32.768KHz ¡E Eight R-option pins ¡E Operation Volltage 3.5 ¡ã 6V for FSK ¡ Operation Volltage 2.5 ¡ã 6V for DTMF E ¡ Bell 202 , V.23 FSK demodulator E ¡ DTMF generator E ¡ Ring detector on chip E CALL WAITING ¡E Operation Volltage 3.6 ¡ã 5.5V ¡E patible with Bellcore special report SR-TSV-002476 ¡E Call-Waiting (2130Hz plus 2750Hz) Alert Signal Detector ¡E Good talkdown and talkoff...