ETIC 2230 Guide de l'utilisateur télécharger pdf (Page 51)

Rev. 1.10 50 November 14, 2014 Rev. 1.10 51 November 14, 2014

HT66FW2230

Wireless Charger A/D Flash 8-Bit MCU

Input/Output Ports

HoltekmicrocontrollersofferconsiderableexibilityontheirI/Oports.Withtheinputoroutput

designationofeverypinfullyunderuserprogramcontrol,pull-highselectionsforallportsand

wake-upselectionsoncertainpins,theuserisprovidedwithanI/Ostructuretomeettheneedsofa

widerangeofapplicationpossibilities.

Thedeviceprovidesbidirectionalinput/outputlineslabeledwithportnamesPA,PBandPC.These

I/OportsaremappedtotheRAMDataMemorywithspecicaddressesasshownintheSpecial

PurposeDataMemorytable.AlloftheseI/Oportscanbeusedforinputandoutputoperations.For

inputoperation,theseportsarenon-latching,whichmeanstheinputsmustbereadyattheT2rising

edgeofinstruction“MOVA,[m]”,wheremdenotestheportaddress.Foroutputoperation,allthe

dataislatchedandremainsunchangeduntiltheoutputlatchisrewritten.

Name

Bit

7 6 5 4 3 2 1 0

PA D7 D6 D5

D4 D3 D2 D1 D0

PAC D7 D6 D5

D4 D3 D2 D1 D0

PAPU D7 D6 D5

D4 D3 D2 D1 D0

PAWU D7 D6 D5

D4 D3 D2 D1 D0

PB — — —

D4 D3 D2 D1 D0

PBC — — —

D4 D3 D2 D1 D0

PBPU — — —

D4 D3 D2 D1 D0

PC D7 D6 D5

D4 D3 D2 D1 D0

PCC D7 D6 D5

D4 D3 D2 D1 D0

PCPU D7 D6 D5

D4 D3 D2 D1 D0

Pull-high Resistors

Manyproductapplicationsrequirepull-highresistorsfortheirswitchinputsusuallyrequiringthe

useofanexternalresistor.Toeliminatetheneedfortheseexternalresistors,allI/Opins,when

conguredasaninputhavethecapabilityofbeingconnectedtoaninternalpull-highresistor.These

pull-highresistorsareselectedusingregistersPAPU~PCPU,andareimplementedusingweak

PMOStransistors.

PAPU Register

Bit 7 6 5 4 3 2 1 0

Name D7 D6 D5 D4 D3 D2 D1 D0

R/W R/W R/W R/W R/W R/W R/W R/W R/W

POR 0 0 0 0 0 0 0 0

Bit7~0 I/OPortAbit7~bit0Pull-HighControl

0:Disable

1:Enable

PBPU Register

Bit 7 6 5 4 3 2 1 0

Name — — — D4 D3 D2 D1 D0

R/W — — — R/W R/W R/W R/W R/W

POR — — — 0 0 0 0 0

Bit7~5 Unimplemented,readas“0”

Bit4~0 I/OPortBbit4~bit0Pull-HighControl

0:Disable

1:Enable

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ETIC 2230 Guide de l'utilisateur Page 51

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