RM: i.MX RT1020 Processor Reference Manual, Rev. 1, 12/2018
Hi,
Regarding the GPT1_COMPARE1-3 signals:
On page 273 in the RM tells us that:
GPT1_COMPARE1 GPIO_AD_B0_00 ALT7
GPT1_COMPARE2 GPIO_EMC_41 ALT7
GPT1_COMPARE3 GPIO_EMC_40 ALT7
Also from page 276/277:
LPUART7_RXD GPIO_EMC_35 ALT2
LPUART5_CTS_B GPIO_EMC_36 ALT2
LPUART5_RTS_B GPIO_EMC_37 ALT2
These seem to match the relevant SW_MUX_CTL_PAD_GPIO_xxx mux mode register settings.
So far so good.
But table ‘46-2. GPT External Signals’, on page 2442, tells us:
GPT1_COMPARE1 GPIO_EMC_35 ALT2 O
GPT1_COMPARE2 GPIO_EMC_36 ALT2 O
GPT1_COMPARE3 GPIO_EMC_37 ALT2 O
Does this make sense to you? You can't have two modules using the same signal/muxmode combination can you?
I just had a look at the 1050 RM. The GPT1_COMPARE settings are all consistent. So it looks like GPT table in the 1020 RM (page 2442) is just wrong – a cut and paste error?
Many thanks.
Hello,
Yes, GPT table in the 1020 RM (page 2442) is error.Thanks for your information and We will forward it to the related team.
Have a nice day.
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In fact the whole table 46-2 is wrong compared to page 273. It should read more like this:
GPT1_CAPTURE1 GPIO_AD_B0_02 ALT7 I
GPT1_CAPTURE2 GPIO_AD_B0_01 ALT7 I
GPT1_CLK GPIO_EMC_39 ALT7 I
GPT1_COMPARE1 GPIO_AD_B0_00 ALT7 O
GPT1_COMPARE2 GPIO_EMC_41 ALT7 O
GPT1_COMPARE3 GPIO_EMC_40 ALT7 O
GPT2_CAPTURE1 GPIO_AD_B1_10 ALT6 I
GPT2_CAPTURE2 GPIO_EMC_28 ALT6 I
GPT2_CLK GPIO_EMC_31 ALT6 I
GPT2_COMPARE1 GPIO_AD_B1_11 ALT6 O
GPT2_COMPARE2 GPIO_EMC_29 ALT6 O
GPT2_COMPARE3 GPIO_EMC_30 ALT6 O