GENERAL DESCRIPTION
EM78P153S is an 8-bit microprocessor with low-power and high-speed CMOS technology. It is equipped with a 1024*13-bits Electrical One Time Programmable Read Only Memory (OTP-ROM) within it. 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.

FEATURES
• 14-lead packages : EM78P153S
• Operating voltage range : 2.3V~5.5V
• Available in temperature range: 0°C~70°C
• Operating frequency range (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 1.5 mA at 5V/4MHz
    * typical of 15 µA, at 3V/32KHz
    * typical of 1µA, during the sleep mode
• 1024 × 13 bits on chip ROM
• Built-in calibrated IRC oscillators (8MHz, 4MHz, 1MHz, 455KHz )
• Programmable prescaler of oscillator set-up time
• 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 and trigger edges, and with 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
• Package type: 14 pins SOP, DIP
    * 14 pin DIP 300mil: EM78P153SP
    * 14 pin SOP 150mil: EM78P153SN
• The transient point of system frequency between HXT and LXT is around 400KHz.