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2011-2015 Microchip Technology Inc.
DS40001609E-page 277
PIC16(L)F1508/9
25.9
Register Definitions: NCOx Control Registers
REGISTER 25-2:
NCOxCLK: NCOx INPUT CLOCK CONTROL REGISTER
REGISTER 25-1:
NCOxCON: NCOx CONTROL REGISTER
R/W-0/0
R/W-0/0
R-0/0
R/W-0/0
U-0
U-0
U-0
R/W-0/0
NxEN
NxOE
NxOUT
NxPOL
—
—
—
NxPFM
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7
NxEN:
NCOx Enable bit
1
= NCOx module is enabled
0
= NCOx module is disabled
bit 6
NxOE:
NCOx Output Enable bit
1
= NCOx output pin is enabled
0
= NCOx output pin is disabled
bit 5
NxOUT:
NCOx Output bit
1
= NCOx output is high
0
= NCOx output is low
bit 4
NxPOL:
NCOx Polarity bit
1
= NCOx output signal is active low (inverted)
0
= NCOx output signal is active high (non-inverted)
bit 3-1
Unimplemented
: Read as ‘
0
’
bit 0
NxPFM:
NCOx Pulse Frequency Mode bit
1
= NCOx operates in Pulse Frequency mode
0
= NCOx operates in Fixed Duty Cycle mode
R/W-0/0
R/W-0/0
R/W-0/0
U-0
U-0
U-0
R/W-0/0
R/W-0/0
NxPWS<2:0>
(1, 2)
—
—
—
NxCKS<1:0>
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-5
NxPWS<2:0>:
NCOx Output Pulse Width Select bits
(1, 2)
111
= 128 NCOx clock periods
110
= 64 NCOx clock periods
101
= 32 NCOx clock periods
100
= 16 NCOx clock periods
011
= 8 NCOx clock periods
010
= 4 NCOx clock periods
001
= 2 NCOx clock periods
000
= 1 NCOx clock periods
bit 4-2
Unimplemented:
Read as ‘
0
’
bit 1-0
NxCKS<1:0>:
NCOx Clock Source Select bits
11
= NCO1CLK pin
10
= LC1_out
01
= F
OSC
00
= HFINTOSC (16 MHz)
Note 1:
NxPWS applies only when operating in Pulse Frequency mode.
2:
If NCOx pulse width is greater than NCO_overflow period, operation is indeterminate.
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