AMC130M02: About command responses

Hi Ryusuke,

Sorry for the delay. 

R.Fukunaga said:

1) About WREG command,

Can WREG command write only 1 register when n=0 is specified like RREG command?

My customer is guessing that WREG command only supports writing multiple registers.

Is it correct?

Both the WREG and RREG commands will write/read a single register when n=0.  

R.Fukunaga said:

2) About  RESET/RREG/WREG command,

After issuing commands other than RESET/RREG/WREG,

does the mode change immediately after execution of commands whose behavior is unclear?

Regarding NULL command, when it is used to update STAT register, is STAT register updated immediately?

The estimated response after executing a command other than RESET/RREG/WREG is described in the document. Is this correct?

Generally the command is executed at the end of the Frame sequence.  The NULL command doesn't write to the STATUS register, it just reads.  The SEC_FAIL bit in the STATUS register doesn't clear until a read is done, so if there is a SEC_FAIL that recovers: the first read of the STATUS register will show the SEC_FAIL high and the second read will have the SEC_FAIL bit cleared.

The responses should match the documentation, although I think there was a typo in the RESET response which should be 0xFF32 instead.

Thanks.