EM78886数据手册Elan中文资料规格书

描述 Description

The EM78886 is an 8-bit RISC architecture microprocessor with low power, high speed CMOS technology. Integrated onto a single chip are on-chip Watchdog Timer (WDT), RAM, ROM, programmable time clock/counter, internal interrupt, power down mode, LCD driver, differential energy detector (DED), current DA module and tri-state I/O. The EM78886 provides a single chip solution to quickly design a powerful product.

特性 Features

CPU
• Operating voltage: Typical 2.0V~5.5V for normal mode
• Min operating voltage: 2.0V for 0.895MHz~1.79MHz, 2.2V for 3.58MHz and 3.3V for 10.74MHz
• 1.8V~5.5V for green mode
• 32K x 13 on-chip program ROM
• 2.5K x 8 on-chip RAM
• Up to 44 bi-directional tri-state I/O ports
• 8 level stacks for subroutine nesting
• 8-bit time clock/counter (TCC)
• Two independent 8 bits up-counter interrupt
• Selective signal sources and trigger edges, and with overflow interrupt
• Programmable free running on-chip watchdog timer
• Single instruction cycle commands
• 4 step Normal mode CLK : 0.895, 1.79, 3.58, 10.74 MHz generated by the internal PLL
• Four operation modes: Sleep mode (CPU and main clock turn off, 32.768KHz clock turn off), IDLE mode (CPU and main clock turn off, 32.768KHz clock turn on), Green mode (main clock turn off, CPU and 32.768KHz clock turn on), Normal mode (main clock turn on , CPU and 32.768KHz clock turn on)
• Universal Low battery detector (reference voltage: 2V or VDD)
• Input port wake-up function
• Seven interrupt sources: 4 external, 3 internal
• Port key scan function
• External Sub-Clock frequency is 32.768KHz
• Oscillator start-to-stable time is smaller or equal to 0.5 sec

SPI
• Operating Voltage: 1.8V~5.5V
• Serial Peripheral Interface (SPI): a kind of serial I/O interface
• Interrupt flag available for the read buffer full or transmitter buffer empty
• Programmable baud rates of communication
• Three-wire synchronous communication (shared with I/O)

LCD
• LCD operating voltage chosen by software
• Operating voltage: 1.8V~5.5V
• Common driver pins: 8/16
• Segment driver pins: 60
• 1/4 bias
• 1/8, 1/16 duty

Current D/A
• Operating Voltage: 1.8V ~ 5.5V
• 10-bit resolution and 3-bit output level
• Current D/A output can drive speaker through a transistor for sound player
• User-switchable output port between DAOUT1 and DAOUT2

Die Form
• Available, Please contact Elan Sales