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        EM78P159N is an 8-bit microprocessor designed and developed with low-power, high-speed CMOS technology. It is quipped with 1K x 13-bits Electrical One Time Programmable Read Only Memory (OTP-ROM). It provides three PROTECTION bits to prevent user's code in the OTP memory from being intruded. 8 OPTION bits are also available to meet user's requirements.

      With its OTP-ROM feature, the EM78P159N 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.

    2. Operating voltage range:
      * 2.1V ~ 5.5V at 0C ~ 70C
      * 2.3V ~ 5.5V at 40C ~ 85C
    3. Operating frequency range (base on 2 clocks ):
      * Crystal mode: DC ~ 20MHz at 5.0V, DC ~ 8MHz at 3.0V, DC ~ 4MHz at 2.1V
      * ERC mode: DC ~ 4MHz at 5.0 ~ 2.1V
      * IRC mode: 4 choices of frequencies available; I.e., 8M, 4M, 1M, & 455KHz
    4. IRC mode:
      * All these four main frequencies can be trimmed by programming with four calibrated bits in the ICE159N Simulator.
         OTP is auto trimmed by DWTR.
      * Temperature, Voltage, and Process changes will influence the frequency drift
      * Frequency deviation is only 4.5% after auto trimming (based on Vdd=5V,Ta=25C)
    5. Fast set-up time only requires about 2ms in high XTAL and 32CLKS in IRC mode from wake up to operating mode
    6. Low power consumption:
      * Less then 2mA at 5V/4MHz
      * Typically 20A at 3V/32kHz
      * Typically 1A during Sleep mode
    7. 1K x 13 bits on chip ROM
    8. One security register to prevent intrusion of OTP memory codes
    9. One configuration register to accommodate user's requirements
    10. 48 x 8 bits on chip registers (SRAM, general purpose register)
    11. 2 bi-directional I/O ports
    12. 5 level stacks for subroutine nesting
    13. 8-bit real time clock/counter (TCC) with selective signal sources, trigger edges, and overflow interrupt
    14. Two clocks per instruction cycle
    15. Power down (SLEEP) mode
    16. Three available interruptions:
      * TCC overflow interrupt
      * Input-port status changed interrupt (wake up from Sleep mode)
      * External interrupt
    17. Programmable free running watchdog timer
    18. 8 programmable pull-high pins
    19. 8 programmable pull-down pins
    20. 8 programmable open-drain pins
    21. 2 programmable R-option pins
    22. Package types:
      * 18 pin DIP 300mil : EM78P159NP
      * 18 pin SOP 300mil : EM78P159NM
      * 20 pin SSOP 209mil : EM78P159NAS
      * 20 pin SSOP 209mil : EM78P159NKM
      * 99.9% single instruction cycle commands
    23. The transient point of system frequency between HXT and LXT is around 400KHz

    24. ϺTӿƼ޹˾ ©   2000-2014
      Ԓ18101791225 棺021-36360067g֧֣Ϻl
      ַϺй·3737̖͇H̄ՏVB1709   Wվ䰸̖ICP16018318̖-1

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