DS250DF230: Procedure to accress PPM count in address 0x3B and 0x3C

user4779049

Expert 2215 points

Part Number: DS250DF230

Tool/software:

Hi Team,

Please advice om on my question bellow:

Can you let me know the proper procedure to access the PPM counter in address 0x3B and 0x3C?

There is a bit labeled as Freeze the PPM counter in address 0x30 bit [7].

It says that setting this bit to ‘1’ to allow safe read asynchronously.

Is it a correct procedure that setting this bit to ‘1’, and reading the data in address 0x3B and 0x3C?

In the meantime, there is a bit labeled PPM_ERR_RDY in address 0x34 bit 7.

It says that ‘1’ Indicates that a PPM error count is read (ready) to be read from channel

Reg_0x3B and Reg_0x3C.

Is it a correct procedure that checking this bit to be ‘1’, and reading the data in address 0x3B and 0x3C?

Mita

+1 Lucas Wolter 5 months ago

Hi Mita,

Here is the recommended procedure to check PPM count asynchronously.

1. Check if 0x34[7] = 1. This indicates PPM count in registers 0x3B and 0x3C is valid.

2. Write 0x30[7] = 1. This freezes the PPM count in registers 0x3B and 0x3C so it does not continuously update.

3. Check PPM count in registers 0x3B and 0x3C.

4. Write 0x30[7] = 0 to unfreeze the PPM count.

Best,

Lucas

0 user4779049 5 months ago in reply to Lucas Wolter

Expert 2215 points

Lucas-san,

Thank you for your answer.

Mita

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