Ublox IRIS-W10 Series, User Manual

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EVK-IRIS-W10 - User guide
UBX-23007837 - R03 Hardware description Page 25 of 43
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3.8 mikroBUS slots
EVK-IRIS-W10 has four mikroBUS standard compatible slots with multiple choices of RESET
signal for each slot. All slots are not enabled to use by default, and that is mainly due to the
multiplexing of the Flexcomm interfaces pins of the NXP RW612 chip as shown in
Table 11.
When utilizing the mikroBUS slots, consider:
•
mikroBUS1 cannot be used as SPI interface simultaneously with WCI-2 function or FTDI-
SPI, which shares GPIO 0, GPIO 1, GPIO 2, GPIO 3 and GPIO 4 . However, mikroBUS1 can
still be used a UART or I2C interface.
•
mikroBUS2 cannot be used as SPI interface simultaneously with SDIO function, which
shares GPIO 15 and GPIO 16. However, mikroBUS2 can still be used as a UART or I2C
interface.
•
mikroBUS4 cannot be used totally with RMII interface, which shares GPIO 56 and GPIO 57 .
•
mikroBUS3 cannot be used totally with
JTAG
interface, which shares all GPIOs on this slot.
•
There is a dedicated GPIO for the analog pin in each mikroBUS slot, as shown in Table 12.
•
All four mikroBUS slots share GPIO 27 as the PWM pin, so this GPIO can only be used in a
single slot. GPIO 27 is enabled on slot 2 by default, as shown in Table 12 and Table 13 .
•
All four mikroBUS slots share
GPIO 18
as
INT
pin, so this can be used in a single slot – but
not simultaneously with
SDIO. GPIO 18
is enabled on slot 2 by default, as shown in Table
12 and Table 13 .
•
All four mikroBUS slots share the RESET signal options – either to the global RESETn
signal of the EVB (active low) or to GPIO 50 , which is intended as user-defined RESET. This
is mainly because the Click boards have different reset options, as shown in Table 14.
•
The inner row of each slot is easily accessible – even with the use of add-on Click boards.
•
The top-position slots are for extended use or include antenna add-on Click boards, as
shown in Table 11 .
GPIO UART SPI I2C SDIO JTAG WCI-2 RMII FTDI
mikroBUS 1 Flexcomm 0 GPIO0 CS SPI-RX
GPIO2 RX MOSI SDA SPI-CS
GPIO3 TX MISO SCL SPI-TX
GPIO4 CLK WCI-2 SPI-Clk
mikroBUS 2 Flexcomm 2 GPIO13 RXD MOSI SDA
GPIO14 TXD MISO SCL
GPIO15 CLK SDIO-CLK
GPIO16 CS SDIO-D3
mikroBUS 3 Flexcomm 1 GPIO6 CS JTAG
GPIO7 CLK JTAG
GPIO8 TXD MISO SCL JTAG
GPIO9 RXD MOSI SDA JTAG
mikroBUS 4 Flexcomm 14 GPIO53 CS
GPIO54 CLK
GPIO56 TXD MISO SCL MDC
GPIO57 RXD MOSI SDA MDIO
Table 11: mikroBUS slots pin configuration