PIC18F66K80 FAMILY
DS39977F-page 204
2010-2012 Microchip Technology Inc.
TABLE 12-1:
SUMMARY OF REGISTERS ASSOCIATED WITH DATA SIGNAL MODULATOR MODE
REGISTER 12-4:
MDCARL: MODULATION LOW CARRIER CONTROL REGISTER
R/W-0
R/W-x
U-0
R/W-x
MDCLODIS
MDCLPOL
MDCLSYNC
MDCL3(1)
MDCL2(1)
MDCL1(1)
MDCL0(1)
bit 7
bit 0
Legend:
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 7
MDCLODIS:
Modulator Low Carrier Output Disable bit
1
= Output signal driving the peripheral output pin (selected by MDCL<3:0> of the MDCARL register)
is disabled
0
= Output signal driving the peripheral output pin (selected by MDCL<3:0> of the MDCARL register)
is enabled
bit 6
MDCLPOL:
Modulator Low Carrier Polarity Select bit
1
= Selected low carrier signal is inverted
0
= Selected low carrier signal is not inverted
bit 5
MDCLSYNC:
Modulator Low Carrier Synchronization Enable bit
1
= Modulator waits for a falling edge on the low time carrier signal before allowing a switch to the high
time carrier
0
= Modulator output is not synchronized to the low time carrier signal(1)
bit 4
Unimplemented:
Read as ‘0’
bit 3-0
MDCL<3:0>
Modulator Data High Carrier Selection bits(1)
1111
-1001 = Reserved
1000
= CCP5 output (PWM Output mode only)
0111
= CCP4 output (PWM Output mode only)
0110
= CCP3 output (PWM Output mode only)
0101
= CCP2 output (PWM Output mode only)
0100
= ECCP1 output (PWM Output mode only)
0011
= Reference clock module signal
0010
= MDCIN2 port pin
0001
= MDCIN1 port pin
0000
= VSS
Note 1:
Narrowed carrier pulse widths or spurs may occur in the signal stream if the carrier is not synchronized.
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
MDCARH MDCHODIS
MDCHPOL MDCHSYNC
MDCH3
MDCH2
MDCH1
MDCH0
MDCARL
MDCLODIS
MDCLPOL
MDCLSYNC
MDCL3
MDCL2
MDCL1
MDCL0
MDCON
MDEN
MDOE
MDSLR
MDOPOL
MDO
—MDBIT
MDSRC
MDSODIS
MDSRC3
MDSRC2
MDSRC1
MDSRC0
PMD2
—MODMD
ECANMD
CMP2MD
CMP1MD
Legend:
— = unimplemented, read as ‘0’. Shaded cells are not used in the Data Signal Modulator mode.
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