Hi all,
I'm busy with a development on a CC430F6137
My hardware configuration is as below:
1) Digital VCC = AVCC = RF VCC = 2.88 volt (regulator with Imax 200mA)
2) DCO enabled in software with 12MHz Clock (ACLK = 32KHz & MCLK = SMCLK=12MHz)
3) Vcore is set to Level 3
4) RF enabled with WOR (868 MHz - fixed 10dBm output power)
5) watchdog timer enabled (ACLK , 1Sec)
the problem is when after sending a RF packet and before entering the WOR mode , the MCU resets with several reasons:
(i checked the SYSRSTIV and displayed it on LCD each time the program start from main(); )
Condition 1:
when the watchdog timer is enabled, the mcu resets more frequently
and SYSRSTIV = 02h = Brownout (BOR)
Condition 2:
when the watchdog timer is disabled, the MCU resets occasionally (less than condition 1)
and SYSRSTIV = 0Eh = SVSH (POR)
i check my VCC on board with a oscilloscope and the vcc has only 140mV p-p ripple
i'm almost sure that reset occurs after sending the RF Packet
because i can receive the packet on a second receiver.
I didn't find a similar known issue in the CC430 errata document.
Any solution ?