Q
How to make use of the BOD?
A
The basic circuit (source: technical data reference guide) is shown below.
with the following values:
Symbol | Min | Typ | Max | Unit |
BOD | 0 | 3.6 | V | |
BOD_T | 1.11 | 1.14 | 1.17 | V |
BOD_H | 47 | 60 | 73 | mV |
BOD_P | 5 | 20 | μs |
So if the power supply splitt up by the resistors drops between R1 and R2 below 1.14V as the typical BOD threshold with an hystresis of 60mV for more than maximal 20μs, an internal signal is generated.
Q
Is there a driver available?
A
The peripheral driver package of the netX90 has an integration of the BOD as an input via the DIO drivers
Example
#include "Examples.h"
#include "netx_drv.h"
void bodcallback(void* pvDriver, void* pvUser){
__NOP();
}
voidbodexample(void) {
// Attach the BOD callback to the bod signal
(void) DRV_DIO_ChannelIRQAttach(DRV_DIO_ID_BOD,bodcallback,(void*)0xaa55aa55);
// Issue the interrupt controller to generate the interrupt
DRV_NVIC_SetPendingIRQ(DRV_BOD_IRQ);
}
See also...