EM78P156N

• Operating voltage range : 2.5V~5.5V
• Operating temperature range: -40~85
• Operating frequency rang (base on 2 clocks ):
* Crystal mode: DC~20MHz at 5V, DC~8MHz at 3V, DC~4MHz at 2.5V.
* ERC mode: DC~4MHz at 5V, DC~4MHz at 3V, DC~4MHz at 2.5V.
• Low power consumption:
* Less then 2 mA at 5V/4MHz
* Typically 20 A at 3V/32KHz
* Typically 1 A during sleep mode
• 1K * 13 bits on chip ROM
• One security register to prevent intrusion of OTP memory codes
• One configuration register to accommodate user's requirements
• 48* 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
• Two clocks per instruction cycle
• Power down (SLEEP) mode
• Three available interruptions
* TCC overflow interrupt
* Input-port status changed interrupt (wake up from sleep mode)
* External interrupt
• Programmable free running watchdog timer
• 8 programmable pull-high pins
• 7 programmable pull-down pins
• 8 programmable open-drain pins
• 2 programmable R-option pins
• Package types:
* 18 pin DIP 300mil : EM78P156NP
* 18 pin SOP 300mil : EM78P156NM
* 20 pin SSOP 209mil : EM78P156NAS
  * 20 pin SSOP 209mil : EM78P156NKM
• 99.9% single instruction cycle commands
• The transient point of system frequency between HXT and LXT is around 400KHz

EM78P156N is an 8-bit microprocessor designed and developed with low-power, high-speed CMOS technology.. It is equipped with 1K*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 EM78P156N is able to offer a convenient way of developing and verifying user's programs. Moreover, user can take advantage of EMC Writer to easily program his development code.