GENERAL DESCRIPTION
EM78P153E is an 8-bit microprocessor with low-power and high-speed CMOS technology. It is equipped with a 512*13-bits Electrical One Time Programmable Read Only Memory (OTP-ROM). It provides a PROTECTION bit to prevent intrusion of user’s code in the OTP memory as well as 15 OPTION bits to match user’s requirements.
With its OTP-ROM feature, the EM78P153E offers users a convenient way of developing and verifying heir programs. Moreover, user developed code can be easily programmed with the EMC writer.

FEATURES
• 14-lead packages : EM78P153E
• Operating voltage range : 2.3V~5.5V
• Available in temperature range: 0°C~70°C
• Operating frequency rang (base on 2 clocks ):
   * Crystal mode: DC~20MHz at 5V, DC~8MHz at 3V, DC~4MHz at 2.3V.
   * ERC mode: DC~4MHz at 5V, DC~4MHz at 3V, DC~4MHz at 2.3V.
• Low power consumption:
   * less then 1.5mA at 5V/4MHz
   * typical of 15 mA, at 3V/32KHz
* typical of 1 mA, during the sleep mode
• 512 ´ 13 bits on chip ROM
• Three built-in calibrated IRC oscillators
• Programmable prescaler of oscillator set-up time
• On-board bit by bit programming
• One security register to prevent the code in the OTP memory from intruding
• One configuration register to match the user’s requirements
• 32´ 8 bits on chip registers (SRAM, general purpose register)
• 2 bi-directional I/O ports
• 5 level stacks for subroutine nesting
• 8-bit real time clock/counter (TCC) with selective signal sources, trigger edges, and overflow interrupt
• Power down mode (SLEEP mode)
• Three available interruptions
   * TCC overflow interrupt
   * Input-port status changed interrupt (wake up from the sleep mode)
   * External interrupt
• Programmable free running watchdog timer
• 7 programmable pull-high I/O pins
• 7 programmable open-drain I/O pins
• 6 programmable pull-down I/O pins
• Two clocks per instruction cycle
• 99.9% single instruction cycle commands
• Package types:
   * 14 pin DIP 300mil: EM78P153EP
   * 14 pin SOP 150mil: EM78P153EN
• The transient point of system frequency between HXT and LXT is around 400KHz.