lcd義隆單片機(jī)em78p468（裸片）

品牌 emc 型號(hào) em78p468n
批號(hào) 10 封裝 sop
營(yíng)銷方式 現(xiàn)貨 產(chǎn)品性質(zhì) 熱銷
處理信號(hào) 數(shù)字信號(hào) 工藝 半導(dǎo)體集成
導(dǎo)電類型 雙極型 集成程度 中規(guī)模
工作溫度 0~70（℃）
品牌型號(hào)批號(hào)封裝營(yíng)銷方式產(chǎn)品性質(zhì)處理信號(hào)工藝導(dǎo)電類型集成程度
emcem78p468
2010dice(裸片)
現(xiàn)貨熱銷
數(shù)字信號(hào)半導(dǎo)體集成
雙極型中規(guī)模

general description

this lsi is an 8-bit risc type microprocessor with high speed cmos technology and low power consumption. integrated onto a single chip are on chip watchdog timer (wdt), data ram, rom, programmable real time clock counter, internal/external interrupt, power down mode, lcd driver, infrared transmitter function, and tri-state i/o. the em78p468l provides multi-protection bits to protect against intrusion of user’s code in the otp memory and a seven option bits to accommodate user’s requirements. it also provides an especial 13 bits customer id option.
with its otp-rom feature, this lsi offers a convenient way of developing and verifying user’s programs. moreover, user developed code can be easily programmed with the elan writer.

 


features

cpu

  • operating voltage and temperature range:
    * em78p468n:
       * commercial:2.3v ~ 5.5 v. (at 0℃~+70℃)
       * industrial: 2.5v ~ 5.5 v. (at -40℃~+85℃)
    * em78p468l:
       * commercial:2.1 v ~ 5.5 v. (at ℃~+70℃)
       * industrial: 2.3v ~ 5.5 v. (at -40℃~+85℃)
  • operation speed: dc ~ 10mhz clock input
  • dual clock operation
    * high frequency oscillator can select among crystal, rc, or pll (phase lock loop)
    * low frequency oscillator can select between crystal or rc mode
  • totally 272 bytes sram
    * 144 bytes general purpose register
    * 128 bytes on chip data ram
  • 4k x 13 bits otp - rom (one time programmable - read only memory)
  • up to 28 bi-directional tri-state i/o ports
    * typically, 12 bi-directional tri-state i/o ports
    * 16 bi-directional tri-state i/o ports shared with lcd segment output pin
  • 8-level stack for subroutine nesting
  • 8-bit real time clock/counter (tcc)
  • one infrared transmitter/pwm generator function
  • four sets of 8 bits auto reload down-count timer can be used as interrupt sources
    * counter 1: independent down-count timer
    * counter 2, high pulse width timer (hpwt), and low pulse width timer (lpwt) shared with ir function
  • programmable free running on chip watchdog timer (wdt). this function can operate on normal, green and idle mode
  • operation modes:
    * normal mode: the cpu operated on frequency of main oscillator (fm)
    * green mode: the cpu operated on frequency sub-oscillator (fs) and main oscillator (fm) stop
    * idle mode: cpu idle, lcd display remains working
    * sleep mode: whole chip stop working
  • input port wake up function (port6, port8). working on idle and sleep mode
  • eight interrupt sources, three external and five internal
    * internal interrupt source : tcc; counter 1,2; high/low pulse width timer.
    * external interrupt source : int0, int1 and pin change wake-up (port 6 and port 8)
  • packages:
    * dice form : 59 pin
    * qfp-64 pin : em78p468nq (body 14mm*20mm)
    * qfp-64 pin : em78p468lq (body 14mm*20mm)
    * lqfp-64 pin : em78p468naq (body 7mm*7mm)
    * lqfp-64 pin : em78p468laq (body 7mm*7mm)
    * lqfp-44 pin : em78p468nbq (body 10mm*10mm)
    * lqfp-44 pin : em78p468lbq (body 10mm*10mm)
    * qfp-44 pin : em78p468ncq (body 10mm*10mm)
    * qfp-44 pin : em78p468lcq (body 10mm*10mm)
  • power on voltage detector provided (2.0 ± 0.1v) for em78p468n
  • power on voltage detector provided (1.7 ± 0.1v) for em78p468l

lcd circuit

  • common driver pins: 4
  • segment driver pins: 32
  • lcd bias: 1/3, 1/2 bias
  • lcd duty: 1/4, 1/3, 1/2 duty