EM78M680 datasheet(13/53 Pages) EMC

13 / 53 page

Contents

Product Specification (V1.11) 02.10.2007

•

Block Diagram

Oscillator

Timing

Control

Built-in

Prescaler

(TCC)

WDT

Timer

DATA & CONTROL BUS

OSCI

OSCO

(PC)

Stack1

ALU

ACC

(Status)

ROM

Instruction

Decoder

Interrupt

Control

Reset &

Sleep &

Wake up

Control

3.3V

Regulator

USB

Device

Controller

VDD

V3.3

Transceiver

D+

D-

TCC

WDT

RAM

(RSR)

Stack2

Stack3

Stack4

Stack5

RC,RD

Prescaler

I/O

Port 8

P80/AD

P81/AD

P82/AD

P83/AD

P84/AD

P85/AD

P86/AD

P87/AD

I/O

Port 9

P90

P91

P92/PWM1/SE1

P94/Vpp

P95

P96

I/O

Port 7

Pattern

Detect

Application

ADC

PWM

Stack6

Stack7

P70

P71

P72

P93/PWM2/SE2

I/O

Port 6

P60/AD

P61/AD

P62/AD

P63/AD

P64/AD

P65/AD

P66/AD

P67/AD

I/O

Port 5

P50/AD

P51/AD

P52/AD

P53/AD

P54/AD

P55/AD

P56/AD

P57/AD

P76

P77

Stack8

FIFO

EEPROM

Function Description

The EM78M680 memory is organized into four spaces, namely; User Program

memory in 6K

×13 bits ROM space, Data Memory in 271 bytes SRAM space,

EEPROM space, and USB Application FIFOs for Endpoint 0, Endpoint 1, Endpoint

2, Endpoint 3, Endpoint 4, Endpoint 5. Furthermore, several registers are used for

special purposes.

6.1 Program Memory

The program space of the EM78M680 is 6K bytes, and is divided into six pages.

Each page is 1K bytes long. After a Reset, the 13-bit Program Counter (PC) points

to location zero of the program space.

The Interrupt Vectors are at 0x0008 (USB and TCC interrupts), 0x0010 (RF

interrupt), 0x0018 (P76 P77 port change interrupt) and 0x020 (EP1~5 output

endpoint interrupt).

EM78M680 Datasheet(PDF) 13 Page - ELAN Microelectronics Corp

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