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參數(shù)資料
| 型號： | EM78P870 |
| 廠商： | ELAN Microelctronics Corp . |
| 元件分類： | 8位微控制器 |
| 英文描述： | 8 BIT MICROCONTROLLER |
| 中文描述： | 8位微控制器 |
| 文件頁數(shù)： | 4/48頁 |
| 文件大?。?/td> | 313K |
| 代理商： | EM78P870 |
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EM78P870
8-bit OTP Micro-controller
_________________________________________________________________________________________________________________________________________________________________
* This specification is subject to be changed without notice.
1
8/19/2004 (V1.5)
I.General Description
The EM78P870 is an 8-bit RISC type microprocessor with low power, high speed CMOS technology. There
are 32Kx13 bits Electrical One Time Programmable Read Only Memory (OTP-ROM) within it. Integrated onto a single
chip are on_chip watchdog (WDT), RAM, programmable real time clock /counter, internal interrupt, power down mode,
LCD driver, build-in KEY TONE clock generation, Programming Tone generators, Serial Peripheral Interface(SPI),
comparator and tri-state I/O. The EM78P870 provides a single chip solution to design a message_display.
II.Feature
CPU
Operating voltage range : 2.5V
5.5V 2.2V~5.5V(Normal mode), 2.0V~5.5V(Green mode)
32K 13 on chip Program Electrical One Time Programmable Read Only Memory (OTP-ROM)
4K 8 on chip data RAM
144 byte working register
Up to 51 bi-directional tri-state I/O ports (32 shared with LCD Segment pins)
IO with internal Pull high, wake-up and interrupt functions
STACK: 32 level stack for subroutine nesting
TCC: 8-bit real time clock/counter (TCC) with 8-bit prescaler
COUNTER1: 8-bit counter with 8-bit prescaler can be an interrupt source
COUNTER2: 8-bit counter with 8-bit prescaler can be an interrupt source
Watch Dog : Programmable free running on chip watchdog timer
CPU modes:
Mode
CPU status
Main clock
Sleep mode
Turn off
Turn off
Green mode
Turn on
Turn off
Normal mode
Turn on
Turn on
12 interrupt source : 8 external , 4 internal
Key Scan : Port key scan function up to 16x4 keys
Sub-Clock: 32.768kHz crystal
Main-clock: 3.5826MHz multiplied by 0.25, 0.5, 1 or 3 generated by internal PLL
Key tone output (shared with IO) : 4kHz, 2kHz, 1kHz
Comparator: 3-channel comparators, internal (16 level) or external reference voltage (shared with IO)
Serial Peripheral Interface (SPI) : Interrupt flag available for the read buffer full, Programmable baud rates of
communication, Three-wire synchronous communication. (shared with IO)
128-pin QFP or chip : EM78P870AH (POVD disable) , EM78P870BH (POVD enable), EM78P870H
Programmable Tone Generators
Operation Voltage 2.2V
5.5V
Programmable Tone1 and Tone2 generators
Independent single tone generation for Tone1 and Tone2
Mixed dual tone generation by Tone1 and Tone2 with 2dB difference
LCD (8x80, 9x80, 16x80, 24x72)
Maximum common driver pins : 16/24
Maximum segment driver pins : 80(SEG0..SEG79)/72(SEG8..SEG79)
Shared COM16 ~ COM23 pins with SEG0 ~ SEG7 pins
1/4 bias for 8, 9 and 16 common mode and 1/5 bias for 24 common mode
1/8, 1/9, 1/16, 1/24 duty
16 Level LCD contrast control (software)
Internal resistor circuit for LCD bias
Internal voltage follower for better display
Package type
128-pin QFP : EM78P870AQ (POVD disable), EM78P870BQ (POVD enable), EM78P870H
130-pin die
32.768kHz clock status
Turn off
Turn on
Turn on
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