Reference Manual
Table Of Contents
The Digi Microcontroller Assist™ hardware
ConnectCore® 8X System-on-Module Hardware Reference Manual --
Preliminary
34
MCA IO
Pad LGA /
castellated
pads
Digital
I/O
IRQ
capable ADC
32KHz
clock
1.2
Vref
MCA_IO1 AN21 / 52 ✔ ✔ ✔
MCA_IO2 AN22 / 53 ✔ ✔ ✔
MCA_IO3 AN23 / 54 ✔ ✔ ✔
MCA_IO4 AL27 / 61 ✔ ✔ ✔
MCA_IO5 AL28 / 62 ✔ ✔ ✔
MCA_IO6 AK29 / 63 ✔ ✔ ✔
MCA_IO7 AJ29 / 64 ✔ ✔ ✔
MCA_IO8 AH29 / 65 ✔ ✔ ✔
MCA_IO9 AG29 / 66 ✔ ✔
MCA_IO10 AF29 / 67 ✔ ✔
MCA_IO11 AM26 ✔ ✔ ✔
MCA_IO12 AM25 ✔ ✔ ✔
MCA_IO13 AL22 ✔ ✔
MCA_IO14 AL26 ✔ ✔ ✔
MCA_IO15 AL25 ✔ ✔
MCA_IO16 AL24 ✔ ✔
MCA_IO17 AL23 ✔ ✔
MCA_IO18 AM23 ✔ ✔ ✔
Digital IOs
All MCA IOs can be configured as digital inputs/outputs, which are powered from the VCC_MCA power
rail.
The digital outputs preserve the output value set in all operating modes, except in power off and coin
cell modes where the IOs are reconfigured to high impedance state to preserve power.
MCA IRQs
You can configure the MCA IOs as interrupt inputs, using the MCA software to configure the active
edge of the interrupt (rising, falling, or both). The firmware provides a configurable debounce filter for
each GPIO that improves noise immunity and filters rebounds on push buttons. When one or more
MCA IRQs are activated, the MCA interrupts the main processor through the corresponding IRQ line,
signaling the active IRQs in the IRQ status registers. The IRQ inputs can wake the system from any
low power mode (suspend or power off).
See the MCAsoftware documentation for additional information about how to configure and access
the MCA IRQ lines.