Holtek HT66F004 - A;D Converter Registers

Rev. 1.71 98 April 11, 2017 Rev. 1.71 99 April 11, 2017
HT66F002/HT66F0025/HT66F003/HT66F004
Cost-Effective A/D Flash MCU with EEPROM
HT66F002/HT66F0025/HT66F003/HT66F004
Cost-Effective A/D Flash MCU with EEPROM
A/D Converter Register Description
OveralloperationoftheA/Dconverteriscontrolledusingveregisters.Areadonlyregisterpair
existstostoretheADCdata12-bitvalue.Theremainingthreeregistersarecontrolregisterswhich
setuptheoperatingandcontrolfunctionoftheA/Dconverter.
Name
Bit
7 6 5 4 3 2 1 0
SADOL
(ADRFS=0)
D3 D2 D1 D0 — — — —
SADOL
(ADRFS=1)
D7 D6 D5 D4 D3 D2 D1 D0
SADOH
(ADRFS=0)
D11 D10 D9 D8 D7 D6 D5 D4
SADOH
(ADRFS=1)
— — — — D11 D10 D9 D8
SADC0 START ADBZ ENADC ADRFS — — SACS1 SACS0
SADC1 SAINS2 SAINS1 SAINS0 — — SACK2 SACK1 SACK0
SADC2 ENOPA VBGEN — — SAVRS3 SAVRS2 SAVRS1 SAVRS0
A/D Converter Register List – HT66F002/HT66F0025/HT66F003
Name
Bit
7 6 5 4 3 2 1 0
SADOL
(ADRFS=0)
D3 D2 D1 D0 — — — —
SADOL
(ADRFS=1)
D7 D6 D5 D4 D3 D2 D1 D0
SADOH
(ADRFS=0)
D11 D10 D9 D8 D7 D6 D5 D4
SADOH
(ADRFS=1)
— — — — D11 D10 D9 D8
SADC0 START ADBZ ENADC ADRFS — SACS2 SACS1 SACS0
SADC1 SAINS2 SAINS1 SAINS0 — — SACKS2 SACKS1 SACKS0
SADC2 ENOPA VBGEN — — SAVRS3 SAVRS2 SAVRS1 SAVRS0
A/D Converter Register List – HT66F004
A/D Converter Data Registers – SADOL, SADOH
Asthedevicescontainaninternal12-bitA/Dconverter,itrequirestwodataregisterstostorethe
convertedvalue.Theseareahighbyteregister,knownasSADOH,andalowbyteregister,known
asSADOL.Aftertheconversionprocesstakesplace,theseregisterscanbedirectlyreadbythe
microcontrollertoobtainthedigitisedconversionvalue.Asonly12bitsofthe16-bitregisterspace
isutilised,theformatinwhichthedataisstorediscontrolledbytheADRFSbitintheSADC0
registerasshownintheaccompanyingtable.D0~D11aretheA/Dconversionresultdatabits.
Anyunusedbitswillbereadaszero.NotethattheA/Dconverterdataregistercontentswillnotbe
clearedtozeroiftheA/Dconverterisdisabled.
ADRFS
SADOH SADOL
7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0
0 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 0 0 0 0
1 0 0 0 0 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
A/D Data Registers