How critical are the oscillator trim bits in the configuration register?
A. The oscillator frequency is not critical for the signal conditioner’s operation. However, the signal conditioner operating speed is a direct function of the oscillator frequency. During the manufacturing process, the oscillator bits in the Configuration register are set so the oscillator frequency is closest to the 1MHz. The default value for the oscillator bits is 000b. • Q. How do I trim the oscillator frequency to 1MHz? A. Using the EV kit software, enable the CLK1M and drive the TEST pin high with VDD. Then connect an oscilloscope to the CLK1M pin and change the OSC[2:0] bits in the Configuration register until the frequency of the signal on the CLK1M pin is closest to 1MHz. Note that the EV kit software does not allow for direct modification of the oscillator bits. Instead, a flash file with the desired oscillator bits setting must be created, and then uploaded to the flash memory using the EV kit software. Here is the sequence of steps: • “Save Flash to File” • Open the file a
Related Questions
- The EV kit software does not allow writing to the oscillator bits in the Configuration register. How can I write to these bits?
- I have mistakenly overwritten the oscillator bits in the Configuration register. Can I recover the factory setting?
- How critical are the oscillator trim bits in the configuration register?
