STC micro STC8A8K64D4 Series - Pull-Up Resistor Control Registers (Pxpu); Schmitt Trigger Control Registers (Pxncs); Level Shifting Speed Control Registers (Pxsr); Drive Current Control Registers (Pxdr)

STC8A8K64D4 Series Manual
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9.1.3 Pull-up Resistor Control Registers (PxPU)
Symbol
Address
B7
B6
B5
B4
B3
B2
B1
B0
P0PU
FE10H
P07PU
P06PU
P05PU
P04PU
P03PU
P02PU
P01PU
P00PU
P1PU
FE11H
P17PU
P16PU
P15PU
P14PU
P13PU
P12PU
P11PU
P10PU
P2PU
FE12H
P27PU
P26PU
P25PU
P24PU
P23PU
P22PU
P21PU
P20PU
P3PU
FE13H
P37PU
P36PU
P35PU
P34PU
P33PU
P32PU
P31PU
P30PU
P4PU
FE14H
P47PU
P46PU
P45PU
P44PU
P43PU
P42PU
P41PU
P40PU
P5PU
FE15H
-
-
P55PU
P54PU
P53PU
P52PU
P51PU
P50PU
P6PU
FE16H
P67PU
P66PU
P65PU
P64PU
P63PU
P62PU
P61PU
P60PU
P7PU
FE17H
P77PU
P76PU
P75PU
P74PU
P73PU
P72PU
P71PU
P70PU
Internal 4.1K pull-up resistor control bit. (Note: The pull-up resistors on the P3.0 and P3.1 ports may be slightly smaller.)
0: Disable 4.1K pull-up resistor inside the port
1: Enable 4.1K pull-up resistor inside the port
9.1.4 Schmitt Trigger Control Registers (PxNCS)
Symbol
Address
B7
B6
B5
B4
B3
B2
B1
B0
P0NCS
FE18H
P07NCS
P06NCS
P05NCS
P04NCS
P03NCS
P02NCS
P01NCS
P00NCS
P1NCS
FE19H
P17NCS
P16NCS
P15NCS
P14NCS
P13NCS
P12NCS
P11NCS
P10NCS
P2NCS
FE1AH
P27NCS
P26NCS
P25NCS
P24NCS
P23NCS
P22NCS
P21NCS
P20NCS
P3NCS
FE1BH
P37NCS
P36NCS
P35NCS
P34NCS
P33NCS
P32NCS
P31NCS
P30NCS
P4NCS
FE1CH
P47NCS
P46NCS
P45NCS
P44NCS
P43NCS
P42NCS
P41NCS
P40NCS
P5NCS
FE1DH
-
-
P55NCS
P54NCS
P53NCS
P52NCS
P51NCS
P50NCS
P6NCS
FE1EH
P67NCS
P66NCS
P65NCS
P64NCS
P63NCS
P62NCS
P61NCS
P60NCS
P7NCS
FE1FH
P77NCS
P76NCS
P75NCS
P74NCS
P73NCS
P72NCS
P71NCS
P70NCS
Schmitt trigger control bit:
0: Enable schmitt trigger function on the port. (Schmitt trigger is enabled by default after power-on reset.)
1: Disable schmitt trigger function on the port.
9.1.5 Level Shifting Speed Control Registers (PxSR)
Symbol
Address
B7
B6
B5
B4
B3
B2
B1
B0
Reset
value
P0SR
FE20H
P07SR
P06SR
P05SR
P04SR
P03SR
P02SR
P01SR
P00SR
1111,1111
P1SR
FE21H
P17SR
P16SR
P15SR
P14SR
P13SR
P12SR
P11SR
P10SR
1111,1111
P2SR
FE22H
P27SR
P26SR
P25SR
P24SR
P23SR
P22SR
P21SR
P20SR
1111,1111
P3SR
FE23H
P37SR
P36SR
P35SR
P34SR
P33SR
P32SR
P31SR
P30SR
1111,1111
P4SR
FE24H
P47SR
P46SR
P45SR
P44SR
P43SR
P42SR
P41SR
P40SR
1111,1111
P5SR
FE25H
-
-
P55SR
P54SR
P53SR
P52SR
P51SR
P50SR
xx11,1111
P6SR
FE26H
P57SR
P66SR
P65SR
P64SR
P63SR
P62SR
P61SR
P60SR
1111,1111
P7SR
FE27H
P77SR
P76SR
P75SR
P74SR
P73SR
P72SR
P71SR
P70SR
1111,1111
Level shifting speed control bits:
0: Fast level shifting, and the corresponding up and down impact will be relatively large.
1: Slow level shifting, and the corresponding up and down impact will be relatively small.
9.1.6 Drive Current Control Registers (PxDR)
Symbol
Address
B7
B6
B5
B4
B3
B2
B1
B0
Reset
value
P0DR
FE28H
P07DR
P06DR
P05DR
P04DR
P03DR
P02DR
P01DR
P00DR
1111,1111
P1DR
FE29H
P17DR
P16DR
P15DR
P14DR
P13DR
P12DR
P11DR
P10DR
1111,1111
P2DR
FE2AH
P27DR
P26DR
P25DR
P24DR
P23DR
P22DR
P21DR
P20DR
1111,1111
P3DR
FE2BH
P37DR
P36DR
P35DR
P34DR
P33DR
P32DR
P31DR
P30DR
1111,1111
P4DR
FE2CH
P47DR
P46DR
P45DR
P44DR
P43DR
P42DR
P41DR
P40DR
1111,1111