EM78P809N
8-Bit Microcontroller
4 Function Description
4.1 Functional Block Diagram
OSCI
OSCO
WDT timer
Stack
ROM
WDT Prescaler
TCC Prescaler
R2
Oscillator
Timing Control
R1 (TCC)
ALU
Interrupt
Control
Instruction
Register
General RAM
R4
R3
R5
ACC
Control Sleep and
Wake-up I/O Port
Instruction
Decoder
DATA and CONTROL BUS
PORT6
PORT7
PORT8
PORT9
TC 2 (16-bit Timer/Counter)
TC 3 (8-bit Timer/Counter, Capture Mode)
TC 4 (8-bit Timer/Counter, PWM, PDO)
SPI (Serial Peripheral Interface)
UART (Universal Asynchronous
Receiver/Transmitter)
IOC6
R6
IOC7
R7
IOC8
R8
IOC9
R9
8 channel 10 bit ADC
P60 ~ P67
P70 ~ P73
P80 ~ P81
P90 ~ P97
Keytone
TBT (Time Base Timer)
Fig. 2. Functional Block Diagram
Product Specification (V1.0) 07.26.2005
• 5
(This specification is subject to change without further notice)
ELAN [ ELAN MICROELECTRONICS CORP ]
