General Description
The EM785840 series are 8-bit RISC type microprocessor with low power, high speed CMOS technology. There are 4Kx13 bits ROM within it. This integrated single chip has an on_chip watchdog timer (WDT), RAM, programmable real time clock/counter, internal interrupt, power down mode, dual PWM (Pulse Width Modulation), 8-channel 10-bit A/D converter and tri-state I/O.

Feature
CPU
• Operating voltage : 2.2V~5.5V at main CLK less then 3.58MHz.
• 4k x 13 on chip mask ROM
• 144 x 8 on chip general propose RAM
• Up to 21 bi-directional and 1 input only general purpose I/O (For 24 pin package)
• 8 level stack for subroutine nesting
• 8-bit real time clock/counter (TCC)
• One 8-bit counter interrupt
• On-chip watchdog timer (WDT)
• 99.9％ single instruction cycle commands
• Four action modes in Crystal mode (Main clock can be programmed to 3.58M or 14.3M Hz)
• 2 level Normal mode frequency: 3.58M and 14.3MHz.
• Input port interrupt function
• Dual clocks operation (Internal PLL main clock , External 32.768KHz)

Operating frequency mode
• Crystal mode (XIN,XOUT pin connect external crystal and capacitance)
• ERIC mode (ERCI pin connect resister to VDD)
• IRC mode

PWM
• Dual PWM (Pulse Width Modulation) with 10-bit resolution
• Programmable period (or baud rate)
• Programmable duty cycle

ADC
• Operating : 2.5V∼ 5.5V

• 8 channel 10-bit successive approximation A/D converter
• Internal (VDD) reference voltage

POR
• Power-on reset

PACKAGE
    EM785840M -> 18 pin SOP, EM785841M -> 20 pin SOP, EM785842M -> 24 pin SOP
    EM785840P -> 18 pin PDIP, EM785841P -> 20 pin PDIP, EM785842P -> 24 pin PDIP

Application
    General products application.