EM78815
8-Bit Microcontroller
5 Functional Block Diagram
VDD
Program
RO M
DATA
Data
RAM
Serial
IO
MCU
DATA
RO M
G ND
AVDD
Dual Tone
Generator
TO NE
DTMF
signal
DTMF
Receiver
PLL
CW
Decoder
CAS
FSK
FSK
signal
Decoder
Analog
input
Com parator
FSK DTMF CAS
signal
Energy
Detector
Current
DA
DAO UT
AVSS
Fig. 2 Block Diagram 1
Xin Xout
PLLC
Stack
R2
ROM
WDT Timer
Prescalar
Oscillator
Timing Control
Instruction
Register
ALU
ACC
R1 (TCC)
Interrupt
Control
General
RAM
R3
R5
Control sleep
and wake-up
on I/O port
Instruction
Decoder
R4
Data & Control Bus
Data RAM
Port 6
Port 7
Port 9
Port B
Port 8
Port C
Port D
FSK Decoder
Call Waiting Decoder
DTDMUFAL TONE
IOC6 R6
IOC7 R7 IOC8 R8 IOC9 R9 IOCB RB
IOCC RC IOCD RD
DTMF Receiver
receGivEeNrERATOR
Dual Tone Generator
Keytone
KEY TONE
Serial I/O
COMPARATO
Comparator
P60~P67 P70~P77 P80~P87 P90~P97 PB0~PB7 PC0~PC7 PD0~PD7
SERIAL I/O
R
Current DA
Energy Detect
Fig. 3 Block Diagram 2
6 •
Product Specification (V2.4) 02.17.2006
(This specification is subject to change without further notice)
ELAN [ ELAN MICROELECTRONICS CORP ]
