EM78P447S数据手册Elan中文资料规格书

描述 Description

The EM78P447S is an 8-bit microprocessor with low-power and high-speed CMOS technology. It is equipped with 4k x 13-bits Electrical One Time Programmable Read Only Memory (OTP-ROM). It provides a PROTECTION bit to prevent user’s code in the OTP memory from being intruded. Seven option bits are also available to meet user’s requirements. With its enhanced OTP-ROM feature, the EM78P447S is able to offer a convenient way of developing and verifying user’s programs. Moreover, user can take advantage of ELAN Writer to easily program his development code.

特性 Features

• Operating voltage range: 2.3V~5.5V
• Operating temperature range: -40°C~85°C
• Crystal mode: DC~20MHz/2clks@5V; DC~8MHz/2clks@3V; DC~4MHz/2clks@2.3V
• RC mode: DC~4MHz/2clks@2.3V
• Less then 2.2 mA at 5V/4MHz
• Typically 30 µA at 3V/32KHz
• Typically 1 µA during sleep mode
• 4K x 13 bits on chip ROM
• One security register to prevent intrusion of OTP memory codes
• One configuration register to accommodate user’s requirements
• 148 bytes on chip registers(SRAM, general purpose register)
• 3 bi-directional I/O ports
• 5 level stacks for subroutine nesting
• 8-bit real time clock/counter (TCC) with selective signal sources, trigger edges, and overflow interrupt
• Two clocks per instruction cycle
• Power down (Sleep) mode
• Two available interruptions: TCC overflow and external interrupt
• Programmable free running watchdog timer
• 10 programmable pull-high pins
• 2 programmable open-drain pins
• 2 programmable R-option pins
• 99.9% single instruction cycle commands
• The transient point of system frequency between HXT and LXT is around 400KHz