Sdio - mangOH Yellow Hardware Architecture Manual

Table 2-6: Expansion Connector Signal Connections to CF3 Module (Continued)
Expansion
Pins
GPIO GPIO_24 (Pin 150)
(Pins 12–13) GPIO_33 (Pin 105)
Input Power
(mangOH Yellow
to Expansion)
(Pin 14)
Ground
(Pin 15)

2.4.17 SDIO

The mangOH Yellow supports the CF3 module SDIO signals, which connect via a MUX (controlled by SW403
pin 8 SDIO_SEL2) to the following sources, as shown in
• Wi-Fi+BT module (U300)
• microSD card connector (CN602)
• IoT card connector (CN601)
If SDIO_SEL2 is:
• OFF—If a microSD card or IoT card is inserted, use that card as the SDIO slave, otherwise use the Wi-Fi/BT
module.
• ON—Use the microSD card or IoT card as the SDIO slave. The Wi-Fi/BT module will not be used.
Important:
Only one card can be inserted (either a microSD card or an IoT card). The SDIO interface will not work if both
cards are inserted.
The SDIO interface configuration can be modified as detailed in
Table 2-7: SDIO Interface Configuration Changes
Change type
Hardware As described above.
Rev 2 Oct.19
CF3/Other Signal(s)
Signal Mux
VCC_3V3 n/a
Ground
Change effect
Purpose: User-defined GPIOs
Purpose: Power provided by mangOH Yellow to connected device.
Figure 2-17:
Table 2-7.
Method
SDIO slave selection occurs during module boot
based on the SDIO_SEL2 switch position.
SW403 pin 8
SDIO_SEL2
If the switch is changed while booted, reboot the
module for the change to take effect.
29
Hardware
Notes
Change duration
41113116