One thing to know before using a pull-up resistor is the logic states. Logic circuits have 3 logic states: high, low and floating (or high impedance). The purpose of a pull-up resistor is to ensure input pins are equivalent to the voltage of Ground or VCC (Voltage Common Collector). ...
A pull up resistor is used to provide a default state for a signal line or general purpose input/ouput (GPIO) pin. Typically they are of high resistance thousands or tens of thousands of ohms of resistance. The high resistance ensures that you’re not vampirically sucking too terribly much...
As pull up resistors, Pull-down resistors also works in the same way. But, they pull the pin to a low value. Pull-down resistors are connected between a particular pin on a microcontroller and the ground terminal. An example of a pull down resistor is a digital circuit shown in the fig...
Table 14.Internal Weak Pull-Up Resistor Values forCyclone® VDevices SymbolDescriptionCondition (V)16Value17Unit RPUValue of the I/O pin pull-up resistor before and during configuration, as well as user mode if you have enabled the programmable pull-up resistor option.VCCIO= 3.3 ±5%25kΩ...
Since the device has an integrated 10 k pull-up resistor, an effective value of 4.7 k is obtained by adding an external 8.9 k pull-up resistor. Load CL = 15 pF; Rup = 4.7 k; driver tr = tf 2 ns over temperature range -40 °C to 85 °C. Symbol Table 7....
Table 12. Internal Weak Pull-Up Resistor Values for Intel® Arria® 10 Devices Symbol Description Condition (V) 28 Value 29 Unit RPU Value of the I/O pin pull-up resistor before and during configuration, as well as user mode if you have enabled the programmable pull-up resistor opti...
I searched online for an example and this design did that, but I wanted to be certain this resistor is needed. http://omer.me/uploads/ponte-schematic-revc-300x197.png Oh, and I understand that I could just use the TXB0102 device, but I already have the symbol/layout for the...
Or the VccA is just a symbol which indicates the voltage source connecting with pull up resistor RA? Thank you very much. Regards, Andrew
⎏ for a pin that outputs hi-Z L or low-Z H (or ⎑ with an internal pull-down resistor) Example push-pull vs open-collector: Alternatively, we could put the symbol on the outside of the logic symbol, to keep room inside for e.g. Schmitt Trigger symbols, or perhaps put them ...
The reference voltage is set up by the voltage divider of R2 and R3. A pulse applied to the SET terminal will switch the output of the comparator high. The resistor divider of R1, R4, and R5 now clamps the non-inverting input to a voltage greater than the reference voltage. A pulse ...