Part Number: CC1120
We have RF receiver module using PIC16 MCU. We think this module consume too much power ~20 mA. We expecting uA level.
My questions is
- Do we need disable SPI when SS is HIGH?
- Can we put CC1120 in sleep mode? If yes, can the RF signal wake it up?
- Any TI application note dealing with power?
Appreciate any thoughts.
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In reply to TER:
Thanks for the info. I did try CPWD before post. Seems I will need do some debugging.
I have trouble upload our design draw file to this post,- so maybe need to figure out how to.
Our design is a hub with CC1120 receiver module and 3G/4G modem. The RF module communicate with RF device then process the data then transmit to cloud.
In reply to Dick Lin:
Hi,Our code is pretty straight forward. GPIO interrupt from RF and set flag in ISR. The infinite loop then process receive RF.We were able to wake up PIC16 then process the RF data. After I added the CC1120_SPWD then unable to wakeup the system.I haven't done too much debugging yet other than reading datasheet, TI reference code.I also attached the arch of our design.
ThxDickvoid __interrupt isr()
/* GPIO0 interrupt */
if(RF GPIO0 interrupt)
receivedSyncFlag = true;
// PIC16 MCU
/* Write Radio Regs */
/* Calibrate */
/* Flush RX FIFO */
/* Start WOR */
// THE CODE I ADDED.
// PIC16 MCU
I thought there is a wake up on radio so the CC1120 will be wake-up. Otherwise what's the eWOR for?
If the device not response to anything in SLEEP mode, what's the purpose of this mode?
I figured it out if I have SPWD stobe to cc1120, then the GPIO0 interrupt to MCU never happened.
My question is why in the SPWD mode, interrupt doesn't trigger to MCU?
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