Query Register ('Q')

cmd-ID cmd-data
PC -> uC ‘Q’ = 0x51 off3 off2 off1 off0 ctrl size -
PC <- uC ‘Q’ = 0x51 off3 off2 off1 off0 ctrl size d7 [d6] … [d0]
​

  • off3…off0: offset-address in bytes (4 Gbyte addressable)
  • ctrl: see ctrl
  • size: number of bytes to read (also determines number of data-bytes that follow in the reply from µC -> PC) if size = 0, there is an error in reading the specified register
  • d7 … d0: data-bytes, only number of bytes used are sent (indicated by size)