Specify the slot number you want to monitor in the "CA" register.
"0H" becomes "SLOT0", "1FH" becomes "SLOT31".
This is a write-only register, so written values cannot be read.
Even if you read it, the value is undefined and has no meaning, so please be careful.
CA(R); Call Address
The slot with the number set in this register can read the address of the waveform data currently being read as the relative number of samples from "SA" (start address) (number of samples = number of samples of waveform data).
The LSB (least significant bit) of the value that can be read here indicates 4K (4096) samples, so if the read value is "1H", the monitored slot must have a waveform address of at least 4K samples from "SA". This means that it is being read.
This is a read-only register, so be sure to write [0b] when writing a value.
