circuitpython/ports/mimxrt/boards/MIMXRT1010_EVK/pins.csv
robert-hh 689476c576 mimxrt/machine_uart: Add the UART class to the machine module.
The implementation uses the LPUARTx devices.  Up to 8 UARTs can be used,
given that the pins are accessible.  E.g. 8 on Teensy 4.1, 5 on
MIMXRT1020_EVK.

For Tennsy 4.0 and 4.1 the UART numbers are as printed on the pinout 1..N.
The MIMXRT10xx-EVK boards have only one UART named, which gets the number
1.  All other UART are assigned to different Pins:

MIMXRT1010-EVK:
    D0/D1   UART 1
    D6/D7   UART 2
    A0/D4   UART 3

MIMXRT1020-EVK:
    D0/D1   UART 1
    D6/D9   UART 2
    D10/D12 UART 3
    D14/D15 UART 4
    A0/A1   UART 5

MIMXRT1050-EVK, MIMXRT1060-EVK, MIMXRT1064-EVK:
    D0/D1   UART 1
    D7/D6   UART 2
    D8/D9   UART 3
    A1/A0   UART 4
2021-06-16 01:21:15 +10:00

525 B

1D0GPIO_09
2D1GPIO_10
3D2GPIO_AD_05
4D3GPIO_AD_06
5D4GPIO_08
6D5GPIO_01
7D6GPIO_AD_01
8D7GPIO_AD_02
9D8GPIO_SD_02
10D9GPIO_03
11D10GPIO_AD_05
12D11GPIO_AD_04
13D12GPIO_AD_03
14D13GPIO_AD_06
15D14GPIO_01
16D15GPIO_02
17CUR_AGPIO_AD_01
18CUR_BGPIO_AD_02
19CUR_CGPIO_AD_07
20VOLT_DCBGPIO_AD_09
21CUR_DCBGPIO_AD_10
22A0GPIO_AD_07
23A1GPIO_AD_09
24A2GPIO_AD_10
25A3GPIO_AD_14
26A4GPIO_AD_01
27A5GPIO_AD_02
28PWM_ATGPIO_02
29PWM_ABGPIO_01
30PWM_BTGPIO_04
31PWM_BBGPIO_03
32PWM_CTGPIO_06
33PWM_CBGPIO_05
34ENC_AGPIO_AD_05
35ENC_BGPIO_AD_06
36LED_GREENGPIO_11