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參數(shù)資料
| 型號： | EM78250 |
| 廠商： | ELAN Microelctronics Corp . |
| 英文描述： | 8-Bit Micro-Controller for Consumer Product(帶2K × 13片上ROM，工作電壓4V-6V，2V-4V的8位微控制器) |
| 中文描述： | 8位微控制器的消費產(chǎn)品（帶2K × 13片上ROM的，工作電壓4V至6V的，2V的- 4V合金的8位微控制器） |
| 文件頁數(shù)： | 1/19頁 |
| 文件大?。?/td> | 144K |
| 代理商： | EM78250 |
* This specification are subject to be changed without notice.
EM78250/450
1
Preliminary
12.16.1997
GENERAL DESCRIPTION
The EM78250/450 is an 8-bit microprocessor with low-power, high speed CMOS technology. Integrated onto
a single chip are on-chip watchdog timer (WDT), RAM, ROM, real time clock/counter, power down mode and
bidirectional tri-state I/O ports. It can be developed as keyboard encoder or other applications.
FEATURES
Operating voltage range : 4V ~ 6V, 2V~4V option by code.
Available in temperature range: 0
°
C ~ 70
°
C.
Operating frequency range :
Crystal Type : DC ~ 20MHz at 5V DC ~ 8MHz at 3V
RC Type : DC ~ 4MHz at 5V DC ~ 4MHz at 3V
2K x 13 on chip ROM (EM78250), or
4K x 13 on chip ROM (EM78450)
11 special function registers.
147
×
8 general purpose registers (SRAM).
5 bi-directional I/O ports (35 I/O pins).
3 LED direct sink pins with internal serial resistor, option by code.
One interrupt pin available.
Built-in RC oscillator with external serial resistor,
±
10% variation.
Built-in power on reset.
5 level stack for subroutine nesting.
8-bit real time clock/counter (TCC) with overflow interrupt.
Two oscillator periods option or four oscillator periods per instruction cycle.
Power down mode.
Programmable wake up from sleep circuit on I/O ports.
Programmable free running on-chip watchdog timer.
Twelve wake-up pins.
Two open-drain pins.
Two R-option pins.
40 pin DIP.
8-BIT MICRO-CONTROLLER FOR CONSUMER PRODUCT
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