●GENERAL DESCRIPTION
●EM78P156EL is an 8-bit microprocessor designed and developed with low-power and high-speed CMOS technology. It is equipped with 1K
●13-bits Electrical One Time Programmable Read Only Memory (OTP-ROM). It provides a PROTECTION bit to prevent user’s code in the OTP memory from being intruded. 6 OPTION bits are also available to meet user’s requirements. With its OTP-ROM feature, the EM78P156EL 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.
● FEATURES
●• Operating voltage range : 2.3V~5.5V
●• Operating 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 2.0 mA at 5V/4MHz
● Typically 15 µA at 3V/32KHz
● Typically 1 µA 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 : EM78P156ELP
● 18 pin SOP 300mil : EM78P156ELM
● 20 pin SSOP 209mil : EM78P156ELAS
● 20 pin SSOP 209mil : EM78P156ELKM
●• 99.9% single instruction cycle commands
●• The transient point of system frequency between HXT and LXT is around 400KHz
