义隆单片机，elanmcu,em78p156el

general description

em78p156el is an 8-bit microprocessor designed and developed with low-power and high-speed cmos technology. it is equipped with 1k x 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.

• 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 x 13 bits on chip rom
• 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 : em78156ep
  * 18 pin sop(soic) 300mil : em78156em
  * 20 pin ssop 209mil : em78156eas
  * 20 pin ssop 209mil : em78156ekm
• 99.9% single instruction cycle commands
• the transient point of system frequency between hxt and lxt is around 400khz