Datasheet

PIC16(L)F707
DS41418B-page 92  2010-2011 Microchip Technology Inc.
REGISTER 10-1: FVRCON: FIXED VOLTAGE REFERENCE REGISTER
R-q R/W-0/0 R/W-0/0 R/W-0/0 R/W-0/0 R/W-0/0 R/W-0/0 R/W-0/0
FVRRDY
(1)
FVREN — — CDAFVR1
(2)
CDAFVR0
(2)
ADFVR1
(2)
ADFVR0
(2)
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
q = Value depends on condition
bit 7 FVRRDY: Fixed Voltage Reference Ready Flag bit
(1)
0 = Fixed Voltage Reference output is not active or stable
1 = Fixed Voltage Reference output is ready for use
bit 6 FVREN: Fixed Voltage Reference Enable bit
0 = Fixed Voltage Reference is disabled
1 = Fixed Voltage Reference is enabled
bit 5-4 Reserved: Read as ‘0’. Maintain these bits clear
bit 3-2 CDAFVR<1:0>: Cap Sense and D/A Converter Fixed Voltage Reference Selection bit
(2)
00 = CSM and D/A Converter Fixed Voltage Reference Peripheral output is off.
01 = CSM and D/A Converter Fixed Voltage Reference Peripheral output is 1x (1.024V)
10 = CSM and D/A Converter Fixed Voltage Reference Peripheral output is 2x (2.048V)
11 = CSM and D/A Converter Fixed Voltage Reference Peripheral output is 4x (4.096V)
bit 1-0 ADFVR<1:0>: A/D Converter Fixed Voltage Reference Selection bit
(2)
00 = A/D Converter Fixed Voltage Reference Peripheral output is off.
01 = A/D Converter Fixed Voltage Reference Peripheral output is 1x (1.024V)
10 = A/D Converter Fixed Voltage Reference Peripheral output is 2x (2.048V)
11 = A/D Converter Fixed Voltage Reference Peripheral output is 4x (4.096V)
Note 1: FVRRDY is always ‘1’ on PIC16F707 devices.
2: Fixed Voltage Reference output cannot exceed V
DD.
TABLE 10-1: REGISTERS ASSOCIATED WITH VOLTAGE REFERENCE
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Value on
POR, BOR
Value on
all other
Resets
FVRCON FVRRDY FVREN
Reserved Reserved CDAFVR1 CDAFVR0 ADFVR1 ADFVR0 q000 0000 q000 0000
Legend: Shaded cells are not used by the voltage reference module.