iMX7 UART pin setup

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iMX7 UART pin setup

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fabriziolucini
Contributor I

Hi all, on an iMX7-D processor, we've set UART7 in DTE mode for implementing a complete serial port (with CTS and RTS pins).

In our opinion, the behaviour is not in line to Figure 15.15, while Table 15.28 of the reference manual is correct: in DTE mode, UART7_TX_DATA is connected to ECSPI2_MOSI pad and acts as an output.

UART7_RTS_B is connected to ECSPI2_MISO and acts as an input. This is a little confusing, since we expected RTS to be an output of the DTE port and it is not in line with the second picture in Figure 15.15 (showing signals direction for DTE Mode (UARTn_UFCR[DCEDTE] = 1).

Could you please confirm that our interpretation is correct, and  therefore CTS and RTS roles are exchanged with respect to pin name?

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