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EM78870

Features: •Operating voltage range : 2.2V~5.5V(Normal mode), 2.0V~5.5V(Green mode)•32K× 13 on chip Program ROM•2.5K× 8 on chip data RAM•144 byte working register•Up to 51 bi-directional tri-state I/O ports (32 shared with LCD Segment pins)•IO with internal Pull ...

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SeekIC No. : 004336063 Detail

EM78870: Features: •Operating voltage range : 2.2V~5.5V(Normal mode), 2.0V~5.5V(Green mode)•32K× 13 on chip Program ROM•2.5K× 8 on chip data RAM•144 byte working register•Up to ...

EM78870 Data Sheet

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Part Number:
EM78870
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/11/24

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Product Details

Description



Features:

•Operating voltage range : 2.2V~5.5V(Normal mode), 2.0V~5.5V(Green mode)
•32K× 13 on chip Program ROM
•2.5K× 8 on chip data RAM
•144 byte working register
•Up to 51 bi-directional tri-state I/O ports (32 shared with LCD Segment pins)
•IO with internal Pull high, wake-up and interrupt functions
•STACK: 32 level stack for subroutine nesting
•TCC: 8-bit real time clock/counter (TCC) with 8-bit prescaler
•COUNTER1: 8-bit counter with 8-bit prescaler can be an interrupt source
•COUNTER2: 8-bit counter with 8-bit prescaler can be an interrupt source
•Watch Dog : Programmable free running on chip watchdog timer
•12 interrupt source : 8 external , 4 internal
•Key Scan : Port key scan function up to 16x4 keys
•Sub-Clock: 32.768kHz crystal
•Main-clock: 3.5826MHz multiplied by 0.25, 0.5, 1 or 3 generated by internal PLL
•Key tone output (shared with IO) : 4kHz, 2kHz, 1kHz
•Comparator: 3-channel comparators, internal (16 level) or external reference voltage (shared with IO)
•Serial Peripheral Interface (SPI) : Interrupt flag available for the read buffer full, Programmable baud rates of communication, Three-wire synchronous communication. (shared with IO)


Application

Cordless phones or any telephone product with large LCD needed


Pinout

Connection Diagram


Description

The EM78870 is an 8-bit RISC type microprocessor with low power, high speed CMOS technology. Integrated onto a single chip are on_chip watchdog (WDT), RAM, ROM, programmable real time clock /counter, internal interrupt, power down mode, LCD driver, build-in KEY TONE clock generation, Programming Tone generators, Serial Peripheral Interface(SPI), comparator and tri-state I/O. The EM78870 provides a single chip solution to design a message_display.




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