Holtek HT66F30 - P�Ll-High Resistors

Rev. 2.50 86 June 22, 2017 Rev. 2.50 87 June 22, 2017
HT66F20/HT66F30/HT66F40/HT66F50/HT66F60
HT66FU30/HT66FU40/HT66FU50/HT66FU60
A/D Flash MCU with EEPROM
HT66F20/HT66F30/HT66F40/HT66F50/HT66F60
HT66FU30/HT66FU40/HT66FU50/HT66FU60
A/D Flash MCU with EEPROM
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~PGPU,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
PBPU Register
• HT66F40/HT66F50/HT66F60
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
PCPU Register
• HT66F30/HT66F40/HT66F50/HT66F60
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
PDPU Register
• HT66F40/HT66F50/HT66F60
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
PEPU Register
• HT66F40/HT66F50/HT66F60
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