TC1796
Peripheral Units (Vol. 2 of 2)
General Purpose Timer Array (GPTA)
User’s Manual
24-128
V2.0, 2007-07
GPTA, V2.0
24.2.6.4 PLL-Algorithm
PLL_Control_Logic() “to be performed every GPTA clock”
DCMk.Capture_Value
*CAVk
24
Capture value
DCMk.Capcom_Value
*COVk
24
Capture/compare value
if ( (Pll.Automatic_End) and (Pll.Event) ) then //allow compensation
Pll.Perform_End = 1
endif
if ( (Pll.Counter_Mtick == 0) and ((Pll.Perform_End) or (!Pll.Automatic_End)) )
then //compensation finished or no automatic compensation
Pll.Counter_Mtick = Pll.Number_Mtick
Pll.Perfom_End = 0
endif
if ( (Pll.Counter_Mtick != 0) and ((Pll.Perform_End) or (Bit 24 of Pll.Delta)) )
then //output pulse is necessary
generate pulse on Pll.Signal_Output
Pll.Counter_Mtick --
if (Pll.Counter_Mtick == 0) then
trig(Pll.Service_Request_Trigger)
endif
endif
if (Bit 24 of Pll.Delta) then //delta is < 0
Pll.Delta = Pll.Delta + Pll.Reload_Value
generate pulse on Pll.Signal_Uncomp
else //delta is >= 0
Pll.Delta = Pll.Delta + (0xFFFF0000 or (Pll.Step))
endif
Name k = [0 to 3] for DCM
Short
Name
(*)DCM
Size
(bits)
Function
