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
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