4.12 eQEP Interface
The AM243x LaunchPad supports two eQEP interfaces. eQEP1 and eQEP2 of the AM243x SoC are connected
to the eQEP headers. Both eQEP1 and eQEP2 headers need a voltage translation circuit (TXB0106RGYR) to
level shift the IO's to 5 V from 3.3 V.
• eQEP1_A, eQEP1_B, and eQEP1_I are directly connected to the eQEP header (J12) after voltage
translation .
• eQEP2_A, eQEP2_B are directly connected to the eQEP header (J21) after voltage translation. eQEP2_I
requires an external 1:2 mux (TMUX154EDGSR) since eQEP2_I and MCAN0_TX come from the same pin
(B13). Mux channel selection is done using SoC GPIO.
Figure 4-17. eQEP Interface
Figure 4-18. eQEP1 Header
Hardware Description
38
AM243x LaunchPad™ Development Kit User's Guide
SPRUJ12B – AUGUST 2021 – REVISED OCTOBER 2022
Copyright © 2022 Texas Instruments Incorporated
