EM78568数据手册Elan中文资料规格书

描述 Description

The EM78568 is an 8-bit RISC type microprocessor with low power, high speed CMOS technology. This integrated single chip has an on_chip watchdog timer (WDT), program ROM, data RAM, LCD driver, programmable real time clock/counter, internal interrupt, power down mode, built-in 8-bit D/A converter, 5-bit Comparator, DAC tone generator, CTCSS analog circuit, programming dual tone generator and tri-state I/O.

特性 Features

CPUOperating voltage : 2.2V°5.5V
16K x 13 program ROM
0.5K x 8 on chip data RAM
Up to 36 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)
Input port interrupt function
8 interrupt source , 4 external , 4 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 voltage : 3.0V ~ 5.5V
3-channel input
5-bit comparison reference level setting
Internal (2.5V or VDD) or external reference level
DAC
Operating : 3.0V°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 (2.5V or VDD) or external reference level
CTCSS block
Operating voltage : 2.7V°5.5V
Microphone amplifier (can be used as general OP Amp)
Microphone mute function
RX input OP
Audio BPF (300Hz ~ 3400Hz)
Sub-audio LPF (60Hz ~ 253Hz) for CTCSS tone detection
Zero-crossing for detected CTCSS tone frequency output
CTCSS Tx modulation summing Amp
POVD
Power-on voltage detector reset
Without external reset circuit while enabling
LCD
Common driver pins : 4
Segment driver pins : 20
1/3 bias
1/4 duty, 1/2 duty
16 Level LCD contrast control by software
PACKAGE
100-pin QFP (EM78568Q)
63-pin die (EM78568H)