Max current of pins

Robotics & Edge Computing Jetson & Embedded Systems Jetson TX1
1

I’m not entirely sure on how to interpret the following part of a datasheet of a motor driver:

LOGIC-LEVEL INPUTS AND OUTPUTS
VIL Low-level input voltage Max: 0.8 V
VIH High-level input voltage Min: 1.5 Max: 5.5 V
IIL Low-level input current Min: –50 Max: 50 µA
IIH High-level input current(VIN = 3.3 V, DIR, BRAKE, PWM) Min: 20 Max: 100 µA
(VIN = 3.3 V, ENABLEn) Min: 6 Max: 9 µA
RPD Input pulldown resistance (DIR, BRAKE, PWM) Min: 50 Max: 150 kΩ
(ENABLEn) Min: 350 Max: 550 kΩ
OPEN DRAIN OUTPUTS
VOL Low-level output voltage (IOUT = 2.0 mA) 0.5 V
IOH Output leakage current (VOUT = 3.3V): 1 µA

Does this mean that I can’t directly connect these pins to the majority of GPIO pins on the J21 header of the Jetson Tx1 since the maximum drive current capability of those pins are -20/20 µA? If so, what would be the simplest solution to make the motor driver compliant?

2

Hi, not sure if your post illustrate whole characters of your motor, but 10uA seems too weak for a motor.

3

What I posted was only the data for the connections between the Tx1 and the motor driver. There are a couple of other connections that connect the motor driver to the motor (which draw a lot more current), in which the Tx1 doesn’t play a role.

4

Not sure where you get the 20uA for TX1 pins driver current, it should be +/- 1mA

5

I got this from page 25 of the developer kit carrier board specification.

6

I got this from page 25 of the developer kit carrier board specification.

7

Those pins are from TI TXB0108, not from TX1 chip, so their driver output is 20uA. You can choose the pins from Tegra directly, their output can be 1mA.