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Specification

Overview

  • General Description

    The EM85F789N is an 8-bit microprocessor designed and developed with low-power, high-speed CMOS technology. It has an on-chip 18K Bytes Flash Memory. The debug function is built in EM85F789N chip. User can read the program code from OCDS port and monitor the on-chip register status, memory and program trace log on computer.

  • Features & Benefits

    • MCU

      • System operating condition: 16KHz~20MHz@2.7~5.5V, -40°C~85°C
      • High-speed pipelined 8051-compatible microcontroller

    • Memory

      • 18KB of on-chip Flash memory
      • Flash Memory 10000 writing cycle endurance
      • Built-in In-Application-Programmable (IAP)
      • (256+768) Bytes of on-chip RAM

    • Clock source

      • High Internal RC oscillator (HIRC): 4MHz ±0.25% @ 25°C, 5V & ±2% @ -40~85°C, 2.7~5.5V
      • HXT 1M~4MHz
      • External clock input
      • PLL x48 only for Timer
      • PLL x2~5 for CPU
      • LXT 32.768KHz
      • Low Internal RC oscillator (LIRC): 16K, 32K & 128KHz
      • Operation Frequency: 16KHz~20MHz

    • Analog peripherals

      • 12-bit 100ksps single-ended ADC with (26+2) analog input channel
      • One Operational Amplifier/Comparator with 2mV input offset voltage and 200ns response time
      • Internal voltage reference for ADC: 4.096V/3.072V/2.560V/2.048V (1LSB: 1mV/0.75mV/0.625mV/0.5mV)
      • Internal voltage reference for CMP: 2.048V/1.280V/0.512V/0.256V
      • On-chip regulator: 1.5V ± 3% only for kernel use
      • Power-on Reset (POR): 2.3/2.4V ±0.2V @ -40°C~85°C
      • On-chip Low-voltage detect (HLVD): 2.5V, 2.6V,2.8V,2.9V, 3.1V, 3.3V,3.5V, 3.7V, 3.9V, 4.1V, 4.3V, 4.5V, 4.7V ±0.15V @ -40°C~85°C
      • Brown Out Reset (BOR): 2.5V, 2.6V,2.8V,2.9V, 3.1V, 3.3V,3.5V, 3.7V, 3.9V, 4.1V, 4.3V, 4.5V, 4.7V ±0.15V @ -40°C~85°C

    • Digital peripherals

      • 1-set I2C (16 Bytes Buffer)
      • 1-set UART: 8051's own UART and the other one is Elan's UART
      • 1-set UART (16 Bytes Buffer)
      • 1-set SPI (16 Bytes Buffer)
      • 46 I/O pins, each supports pull-high, pull-low, normal drive/sink, and high drive/sink control functions
      • Two standard 8051 16-bit timer/counters (TC0, TC1) with four operation modes (Mode 0~3)
      • Two general-purpose 16-bit timer/counters (TC3, TC4) with six modes: Timer/Counter/Capture/Window/Buzzer/PWM/PDO (programmable divider output) modes. Its clock source comes from PLL 48 MHz.
      • Three 16-bit Dual PWMs with either normal or trigger mode (need to be used together with CMP1,CMP2), their clock sources come from PLL 48 MHz.
      • LED Driver
      • LCD 4 x 32 dots, bias(1/2, 1/3), duty(static 1/3, 1/4, 1/8)

    • On-Chip Debug2

      • On-chip Debug system (OCD)
      • Provide 6 ROM breakpoints, 1 IDATA/XDATA/SFR register breakpoint.
      • Provide emulation instructions (such as free run, step into, system halt, wake-up, reset, etc.), inspection memory and registers information.

  • Data Sheet

  • Package

  • Technical Information

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