EM78P568
8-bit OTP Micro-controller
I. General Description
The EM78P568 is an 8-bit RISC type microprocessor with low power, high speed CMOS technology. There are
16Kx13 bits Electrical One Time Programmable Read Only Memory (OTP-ROM) within it. It provides security bits and
some One time programmable Option bits to protect the OTP memory code from any external access as well as to meet
user’s options.
This integrated single chip has an on_chip watchdog timer (WDT), program OTP-ROM, data RAM, LCD driver,
programmable real time clock/counter, internal interrupt, power down mode, 8-bit D/A, 5-bit Comparator, DAC tone
generator, CTCSS analog circuit, programming dual tone generator and tri-state I/O.
II. Feature
CPU
•Operating
voltage : 2.2V∼5.5V
•
16k x 13 on chip Electrical One Time Programmable Read Only Memory (OTP-ROM)
•
1k x 8 on chip data RAM
•Up
to 51 bi-directional tri-state I/O ports
•16
level stack for subroutine nesting
•8-bit
real time clock/counter (TCC)
•two
8-bit counters : COUNTER1 and COUNTER2
•On-chip
watchdog timer (WDT)
•99.9％
single instruction cycle commands
•Four
modes (Main clock can be programmed from 447.829k to 17.913MHz generated by internal PLL)
Mode
CPU status
Main clock
32.768kHz clock status
Sleep mode
Turn off
Turn off
Turn off
Idle mode
Turn off
Turn off
Turn on
Green mode
Turn on
Turn off
Turn on
Normal mode
Turn on
Turn on
Turn on
•Input
port interrupt function
•8
interrupt source, 4 external, 8 internal
•Dual
clocks operation (Internal PLL main clock , External 32.768KHz)
PROGRAMMING TONE GENERATORS
•Operating
voltage : 2.2V∼5.5V
•Programming
Tone1 and Tone2 dual tone generators
•
11-bit programming Tone1 generators
•
8-bit programming Tone2 generator
COMPARATOR
•
Operating : 2.7V ~ 5.5V
•3-channel
input
•5-bit
comparison reference level setting
•Internal
(2.5V or VDD) or external reference level
DAC
•Operating
: 2.7V∼5.5V
•8-bit
R-2R D/A converter
•8-bit
programmable tone output
•
Easy to direct access as programmable CTCSS tone output by DAC tone generator
•Internal
(VDD or 2.5V) reference
__________________________________________________________________________________________________________________________________________________________________
* This specification are subject to be changed without notice.
1
01/31/2004
V4.7
EMC [ ELAN MICROELECTRONICS CORP ]
