This article mainly introduces the pull-up resistor and the pull-down resistor. Firstly, it introduces the pull-up resistor from its concept,function, fundamentals, disadvantages,selection principle and applications. Secondly, it introduces the pull-down resistor from concept, function, schematic diagram...
Step 6: Working With Out a Pull-up or Pull Down Resistor
I wonder to know how to treat the JTAG_CLK pin if JTAG interface is not used. in I210 datasheet ver 3.7 Table 14-1, it is said Signal should be connected to ground through a 3.3 KΩ pull-down resistor, but in checklist ver 2.7, it is said Pins JTAG_TDI(29), JTA...
A TTL input is actually the emitter of a multiple emitter transistor. It wants to source current into some kind of load. The amount of current is a "standard TTL load" of 1.6 mA. The biggest pulldown resistor you could use would be 0.8V/1.6 mA or 500 ohms. A smaller resistor...
pull-down resistors ensure the voltage between VCC and a microcontroller pin is actively controlled when the switch is open. However, instead of pulling a pin to a high value, such resistors pull the pin to a low valued instead. Though being less commonly used, a pull-down resistor is stil...
I assume that the external pull-up/down resistors used for the evaluation board work, but by reading the datasheet it seems that if the internal pull-down resistor approaches its lower limit indicated in the datasheet, then the voltage level on high logic state during the boot could be b...
As per TMDSSK3358 board schematic. pull up and pull down value for boot mode pin is 100K and 10K respectively. Please let me know why these value are different. Can we use same value for pull and pull down resistor?. In beagle bone board schematic these value are ...
Pull-up and pull-down resistors– These resistors are used to set a specific level (logic 0 or logic 1) at a floating pin. A pull-up resistor is connected to the power supply so it can pull the floating pin to logic high level. A pull-down resistor connects the floating pin to the...
My customer design wrong schematic. it input 3.3V for PDB even VDDIO=1.8 but they have serial resistor on PDB signal line as below. So I think they can use this serial resistor to change PDB level to 1.8V if I know Pull down resistor in PDB IO. ...
Unlike pinMode(INPUT), there is no pull-downresistornecessary. An internal 20K-ohm resistor is pulled to 5V. This configuration causes the input to read HIGH when the switch is open, and LOW when it is closed. created 14 Mar 2012