Place an SSYNC instruction after you write to DMA4_IRQ_STATUS register (before performing RTI). This would ensure that the peripheral releases the request before the RTI is executed. Another best thing is to perform a dummy PAB access before…
Part number: ADV 7282-U3 WBCPZ-M #1225 2391957
I can confirm that Reset and Powerdown pin is not controlled(maintain a high level 3.3v and 3.13v when the time to read and write) during I2C communication.
I wrote 0x11(color bar) or 0x15(boundary…
You're right. The RTI noise and the RTO noise are equal for an op amp when you have a voltage follower (unity gain feedback). Otherwise you use the noise gain (1/beta) to translate between RTI and RTO.
Ok, propably should use ISR=>IVT and the title of this thread should be something else too, but don't know how to edit that afterwards,
Right now the problem is around the interrupt handler(s).
What could be the official way of creating one?
The first of the four interrupt vector instructions should execute a "PUSH STS". This saves the value of MODE1, ASTAT[xy]. When the RTI instructions is executed to return from the interrupt this pops STS automatically and restores MODE1 and…
The PGIA AD8253 datasheet showed noise performance:
Voltage offset RTI Vos +-150+900/G uV.
Voltage nose 0.1~10Hz,RTI,G=1, 2.5uVp-p.
Then I tested AC performance by 6.5 Digital MultiMeter(HP-3304A), which noise performance showed 4.03mV DC…
1. I think you're missing one detail in the picture: the scope is in 20mV/div, and the noise is referred to input (RTI). That means that after a gain of 10^6 (as shown in the schematic) the equivalent scale is 20mV/10^6 = 20nV -> 20nV/div.…
I'm having what seems to be a very strange problem.
In certain situations, a custom board is loading what looks to be garbage code instead of code from FLASH.
Most strangely, this seems to occur even when I am using the USB-ICE JTAG -- that is,…