Datasheet

Electrical characteristics
i.MX RT1015 Crossover Processors Data Sheet for Consumer Products, Rev. 0.1, 03/2019
NXP Semiconductors 29
4.3.3 Output buffer impedance parameters
This section defines the I/O impedance parameters of the i.MX RT1015 processors for the following I/O
types:
• Single Voltage General Purpose I/O (GPIO)
NOTE
GPIO I/O output driver impedance is measured with “long” transmission
line of impedance Ztl attached to I/O pad and incident wave launched into
transmission line. Rpu/Rpd and Ztl form a voltage divider that defines
specific voltage of incident wave relative to NVCC_XXXX. Output driver
impedance is calculated from this voltage divider (see Figure 6).