Cirrus Logic AN366 - Manual (Page 49)

AN366
49
SET POFF AND QOFF
Negate PAVG and QAVG registers and store in POFF and QOFF respectively (see
Figure 44).
SDI = 0x90
0x64 0xFFFFFF Write P1OFF (page 16, register 36)
SDO = 0xFF 0xFF 0x000003 (3.57628E-07)
SDI = 0x90 0x24 0xFFFFFF Read P1OFF (page 16, register 36)
SDO = 0xFF 0xFF 0x000003 (3.57628E-07)
SDI = 0x90 0x6B 0xFFFFFF Write P2OFF (page 16, register 43)
SDO = 0xFF 0xFF 0x000001 (1.19209E-07)
SDI = 0x90 0x2B 0xFFFFFF Read P2OFF (page 16, register 43)
SDO = 0xFF 0xFF 0x000001 (1.19209E-07)
SDI = 0x90 0x66 0xFFFFFF Write P1OFF (page 16, register 38)
SDO = 0xFF 0xFF 0x000002 (2.38419E-07)
SDI = 0x90 0x26 0xFFFFFF Read P1OFF (page 16, register 38)
SDO = 0xFF 0xFF 0x000002 (2.38419E-07)
SDI = 0x90 0x6D 0xFFFFFF Write P2OFF (page 16, register 45)
SDO = 0xFF 0xFF 0x000002 (2.38419E-07)
SDI = 0x90 0x2D 0xFFFFFF Read P2OFF (page 16, register 45)
SDO = 0xFF 0xFF 0x000002 (2.38419E-07)
Figure 45. Calibration Window
RETURN
POFF
QOFF
to
MAIN FLOW
POWER OFFSET
CALIBRATION
COMPLETE
NEGATE
QAVG
& STORE IN
QOFF
NEGATE
PAVG
& STORE IN
POFF
2