lcd义隆单片机em78p468（裸片）
| 品牌 |
emc |
型号 |
em78p468n |
| 批号 |
10 |
封装 |
sop |
| 营销方式 |
现货 |
产品性质 |
热销 |
| 处理信号 |
数字信号 |
工艺 |
半导体集成 |
| 导电类型 |
双极型 |
集成程度 |
中规模 |
| 工作温度 |
0~70（℃） |
| |
品牌| emc | 型号em78p468 |
批号| 2010 | 封装dice(裸片) |
营销方式| 现货 | 产品性质热销 |
处理信号| 数字信号 | 工艺半导体集成 |
导电类型| 双极型 | 集成程度中规模 |
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
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