Datasheet

PIC16(L)F1825/1829
DS41440C-page 166 2010-2012 Microchip Technology Inc.
17.7 DAC Control Registers
REGISTER 17-1: DACCON0: VOLTAGE REFERENCE CONTROL REGISTER 0
R/W-0/0 R/W-0/0 R/W-0/0 U-0 R/W-0/0 R/W-0/0 U-0 R/W-0/0
DACEN DACLPS DACOE
DACPSS<1:0> DACNSS
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
DACEN: DAC Enable bit
1 = DAC is enabled
0 = DAC is disabled
bit 6
DACLPS: DAC Low-Power Voltage State Select bit
1 = DAC Positive reference source selected
0 = DAC Negative reference source selected
bit 5
DACOE: DAC Voltage Output Enable bit
1 = DAC voltage level is also an output on the DACOUT pin
0 = DAC voltage level is disconnected from the DACOUT pin
bit 4
Unimplemented: Read as ‘0
bit 3-2
DACPSS<1:0>: DAC Positive Source Select bits
00 =V
DD
01 =VREF+
10 = FVR Buffer2 output
11 = Reserved, do not use
bit 1
Unimplemented: Read as ‘0
bit 0
DACNSS: DAC Negative Source Select bits
1 =V
REF-
0 =V
SS
REGISTER 17-2: DACCON1: VOLTAGE REFERENCE CONTROL REGISTER 1
U-0 U-0 U-0 R/W-0/0 R/W-0/0 R/W-0/0 R/W-0/0 R/W-0/0
DACR<4:0>
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
Unimplemented: Read as ‘0
bit 4-0
DACR<4:0>: DAC Voltage Output Select bits
V
OUT = ((VSRC+) - (VSRC-))*(DACR<4:0>/(2
5
)) + VSRC-
Note 1: The output select bits are always right justified to ensure that any number of bits can be used without
affecting the register layout.