EM78871 Datasheet, PDF (8/59 Pages) ELAN Microelectronics Corp – 8-BIT MICRO-CONTROLLER

V.Functional Block Diagram
EM78871
8-bit Micro-controller
CPCUP
U
CTCOTIONMINMTITNRINROGOGLL
TIMER
TCC
COUNTER 1
COUNTER 2
WDT
DPARTOAGRROAMM
PRROOMGRAM
ROM
DADTAATRAARMAM
CONTROL
RCEGOINSTTREORL
REGISTER
LLCCDDDDRRIVIVEERR
LCD
POPIOORIORTT
I/O
FSK DECODER
CURRENT DA
Call waiting decoder
DTMF receiver
DUAL TONE GENERATOR
KEY TONE
COMPARATOR
SERIAL I/O
Fig.2 Block diagram1
Xin Xout PLLC
Oscillator
timing control
WDT timer
prescalar
R1(TCC)
Control sleep
and wake-up
on I/O port
GENERAL
RAM
R4
Interruption
control
ROM
Instruction
register
Instruction
decoder
R2
STACK
ALU
R3
R5
ACC
DATA & CONTROL BUS
DATA RAM
FCSFaKlSlKDwDEaiECtiCOnOgDDdEeERcRoder
DDDTUUTMAMALFLFrTeTrOceOeNcieNvEievErGeGrEENNEERRAATTOORR
CKSECKSOEEROEYMRIYMAPTIAAPLTOALORNIRAN/EIOAT/EOTOORR
CUCRURRERNETNTDADA
OP
PORT5
IOC5
R5
PORT6
IOC6
R6
PORT7
IOC7
R7
PORT8
IOC8
R8
P55~P57 P60~P67 P70~P77 P80~P87
PORT9
IOC9
R9
P90~P97
PORTB
IOCB
RB
PORTC
IOCC
RC
PB0~PB7 PC0~PC7
Fig.3 Block diagram2
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* This specification is subject to be changed without notice. ₈
8/23/04 (V1.5)