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

STC8A8K64D4 Series Manual

9.1.3 Pull-up Resistor Control Registers (PxPU)

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