The EM78P312N is an 8-bit microprocessor with low-power, high-speed CMOS technology and high noise immunity. It has a built-in 4K x 13-bits Electrical One Time Programmable Read Only Memory (OTP-ROM). It provides multi-protection bits to prevent intrusion of user's OTP memory codes. Seven Option bits are also available to meet user's requirements.

With its OTP-ROM feature, the EM78P312N 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.

Features

• Operating voltage: 2.5V ~ 5.5V
• Operating temperature range: -40°C ~ 85°C
• Operating frequency range (base on 2 clocks)
  * Crystal mode: 1MHz ~ 8MHz at 4.5V, 1MHz ~ 4MHz at 2.5V
  * RC mode: 1MHz ~ 4MHz at 2.5V
• Low power consumption:
  * Typically 0.8 mA, during sleep mode
• 4K x 13 bits on-chip ROM
• Multi-security bits to prevent intrusion of OTP memory codes
• One configuration register accommodates user's requirements
• 144 x 8 bits on-chip registers (SRAM, general purpose register)
• 4 bi-directional I/O ports (22 pins)
  * High sink current output pin: 14 pins
  * 10 programmable pull high I/O pins
  * 10 programmable pull low I/O pins
• 8 level stacks for subroutine nesting
• High performance MCU: Two clocks per instruction cycle
• 15 interrupts (External: 4, Internal: 11)
• Programmable free running watchdog timer
• 16 bits Counter/Timer
  * TC2: Timer/Counter/Window
• 8 bits Timer/Counter
  * TCC: 8-bit real time clock/counter with overflow interrupt
  * TC3: Timer/Counter/Capture
  * TC4: Timer/Counter/ PWM (pulse width modulation)/PDO (Programmable divider output)
• Time Base Timer: (1Hz ~ 16KHz at 8MHz)
• Key tone output: (1KHz ~ 8KHz at 8MHz)
• Serial transmitter/receiver interface
  * Serial Peripheral Interface (SPI): Three-wire synchronous communication
  * Universal asynchronous receiver transmitter interface (UART): Two wire asynchronous communication
• AD converter
  * 8 channel 10 bits resolution AD converter
• Operating mode:
  * Normal mode: Oscillation circuit turned on, CPU and Peripheral circuit in operation
  * Idle mode: Oscillation circuit turned on, CPU halt and Peripheral circuit in operation
  * Sleep mode: Oscillation circuit turned off, CPU and Peripheral circuit halt
• Package types:
  * 28-pin DIP 600 mil: EM78P312NP
  * 28-pin Skinny DIP 300 mil: EM78P312NAK
  * 28-pin Skinny DIP 400 mil: EM78P312NK
  * 28-pin SOP 300 mil: EM78P312NM
  * 28-pin SSOP 209 mil: EM78P312NS
• 99.9% single instruction cycle commands

• General purpose