EM78808
8-bit Micro-controller
V.Functional Block Diagram
CP
CPU
U
DATA RAM
DATA RAM
CONTROL
CONTROL
REGISTER
REGISTER
TIMING
TIMING
CONTROL
CONTROL
LCD DRIVER
LCD DRIVER
LCD
TIM ER
TCC
COUNTER 1
COUNTER 2
WDT
IO
IO
PORT
PORT
I/O
DATA ROM
DATA ROM
PROGRAM
PROGRAM
ROM
ROM
FSK DECODER
CURRENT DA
Call waiting decoder
DTMF receiver
DUAL TONE GENERATOR
Energy Detector
KEY TONE
COMPARATOR
SERIAL I/O
OP
Fig.2 Block diagram1
Xin Xout PLLC
WDT timer
Oscillator
timing control
R1(TCC)
Control sleep
and wake-up
on I/O port
GENERAL
RAM
R4
prescalar
Interruption
control
Instruction
register
R3
R5
ALU
ROM
R2
STACK
ACC
Instruction
decoder
DATA & CONTROL BUS
DATA RAM
DATA ROM
FSK DECODER
FSK DECODER
Call waiting decoder
DTMF receiver
DTM F receiver
DUAL TONE GENERATOR
DUAL TONE GENERATOR
KEY TONE
KEY TONE
SERIAL I/O
SERIAL I/O
COM PARATOR
COM PARATOR
CURRENT DA
CURRENT DA
Energy Detector
OP
OP
PORT5
IOC5
R5
PORT6
IOC6
R6
PORT7
IOC7
R7
PORT8
IOC8
R8
PORT9
IOC9
R9
PORTB
IOCB
RB
PORTC
IOCC
RC
P55~P57
P60~P67
P70~P77
P80~P87
P90~P97
PB0~PB7
PC0~PC7
Fig.3 Block diagram2
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* This specification is subject to change without notice.
9
8/1/2004 (V3.1)
EMC [ ELAN MICROELECTRONICS CORP ]
