芯片解密

下面是关于em78447s芯片的主要性能特征介绍，我们提供给广大客户及其他各类技术工程师参考借鉴。

operatingvoltagerange:3v~5v.

em78447sisan8-bitmicroprocessorwithlow-powerandhigh-speedcmostechnology.integratedintoasinglechipareon-chipwatchdogtimer(wdt),ram,rom,realtimeclock/counter,externalandinterrupt,powerdownmode,andtri-statei/o.

operatingintemperaturerange:0°c~70°c.

*crystalmode:dc~20mhzat5v,dc~8mhzat3v,dc~4mhzat3v.

lowpowerconsumption:

*lessthen2maat5v/4mhz

*typically30maat3v/32khz

4k?13bitsonchiprom

oneconfigurationregistertoaccommodateuser’srequirements

148?8bitsonchipregisters(sram,generalpurposeregister)

3bi-directionali/oports

5levelstacksforsubroutinenesting

8-bitrealtimeclock/counter(tcc)withselectivesignalsources,triggeredges,andoverflowinterrupt

twoclocksperinstructioncycle

powerdown(sleep)mode

twoavailableinterruptions

*tccoverflowinterrupt

*externalinterrupt

programmablefreerunningwatchdogtimer

programmablepull-highpins

2programmableopen-drainpins

2programmabler-optionpins

packagetypes:

*28pindip600mil:em78447sap

*28pinsop(soic)300mil:em78447sam

*28pinssop2mil:em78447sas

*32pindip300mil:em78447sbp

*32pinsop(soic)450mil:em78447sbwm

99%singleinstructioncyclecommands

thetransientpointofsystemfrequencybetweenhxtandlxtisaround400khz

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