Specifications

dsPIC33F/PIC24H Family Reference Manual
DS70323E-page 43-10 © 2008-2012 Microchip Technology Inc.
Register 43-5: STCON: PWM Secondary Master Time Base Control Register
U-0 U-0 U-0 HS/HC-0 R/W-0 R/W-0 R/W-0 R/W-0
— — — SESTAT SEIEN EIPU
(1)
SYNCPOL
(1,2)
SYNCOEN
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
SYNCEN
(1,2)
SYNCSRC<2:0>
(1)
SEVTPS<3:0>
(1)
bit 7 bit 0
Legend: HC = Cleared in Hardware HS = Set in Hardware
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-13 Unimplemented: Read as ‘0’
bit 12 SESTAT: Special Event Interrupt Status bit
1 = Secondary special event interrupt is pending
0 = Secondary special event interrupt is not pending
bit 11 SEIEN: Special Event Interrupt Enable bit
1 = Secondary special event interrupt is enabled
0 = Secondary special event interrupt is disabled
bit 10 EIPU: Enable Immediate Period Updates bit
(1)
1 = Active Secondary Period register is updated immediately.
0 = Active Secondary Period register updates occur on PWM cycle boundaries
bit 9 SYNCPOL: Synchronize Input and Output Polarity bit
(1,2)
1 = The falling edge of SYNCIN resets the SMTMR; SYNCO2 output is active-low
0 = The rising edge of SYNCIN resets the SMTMR; SYNCO2 output is active-high
bit 8 SYNCOEN: Secondary Master Time Base Sync Enable bit
(1,2)
1 = SYNCO2 output is enabled
0 = SYNCO2 output is disabled
bit 7 SYNCEN: External Secondary Master Time Base Synchronization Enable bit
(1,2)
1 = External synchronization of secondary time base is enabled
0 = External synchronization of secondary time base is disabled
bit 6-4 SYNCSRC<2:0>: Secondary Time Base Sync Source Selection bits
(1)
011 = SYNCI4
010 = SYNCI3
001 = SYNCI2
000 = SYNCI1
bit 3-0 SEVTPS<3:0>: PWM Secondary Special Event Trigger Output Postscaler Select bits
(1)
1111 = 1:16 Postcale
•
•
•
0001 = 1:2 Postcale
0000 = 1:1 Postscale
Note 1: These bits should be changed only when PTEN = 0.
2: The PWM Time base synchronization must only be used in the master time base with no phase shifting.