PIC16HV785 Microchip Technology Inc., PIC16HV785 Datasheet - Page 74

• Manufacturer Part Number: PIC16HV785
• Description: 20-pin Flash-based 8-bit Cmos Microcontroller
• Manufacturer: Microchip Technology Inc.

PIC16F785/HV785
10.2
The VR Reference module generates a 1.2V nominal
output voltage for use by the ADC and comparators.
The output voltage can also be brought out to the V
pin for user applications. This module uses a bandgap
as a reference. See Table 19-9 for detailed specifica-
tions. Register 10-2 shows the control register for the
VR module.
REGISTER 10-2:
DS41249D-page 72
VR Reference Module
bit 7-6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
REFCON: VOLTAGE REFERENCE CONTROL REGISTER (ADDRESS: 98h)
Unimplemented: Read as ‘0’
BGST: Band Gap Reference Voltage Stable Flag bit
1 = Reference is stable
0 = Reference is not stable
VRBB: Voltage Reference Buffer Bypass bit
1 = V
0 = V
VREN: Voltage Reference Enable bit (VR = 1.2V nominal)
1 = VR reference is enabled
0 = VR reference is disabled and does not consume any current
VROE: Voltage Reference Output Enable bit
If CVROE = 0:
1 = V
0 = Disabled, 1.2 volt VR analog reference is used internally only
If CVROE = 1:
CVROE: Comparator Voltage Reference Output Enable bit (see Figure 10-2)
1 = V
0 = V
Unimplemented: Read as ‘0’
bit 7
Legend:
R = Readable bit
-n = Value at POR
Note 1: Buffer amplifier common mode limitations require V
VROE has no effect.
U-0
—
REF
REF
REF
REF
REF
2: VREN is fixed high for PIC16HV785 device.
output is not buffered. Power is removed from buffer amplifier.
output is buffered
output on RA1/AN1/C12IN0-/V
output on RA1/AN1/C12IN0-/V
output on RA1/AN1/C12IN0-/V
output.
U-0
—
BGST
R-0
(1)
REF
Preliminary
W = Writable bit
‘1’ = Bit is set
R/W-0
VRBB
REF
REF
REF
/ICSPCLK pin is 1.2 volt VR analog reference
/ICSPCLK pin is CV
/ICSPCLK pin is controlled by VROE
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
R/W-0
VREN
(2)
R/W-0
VROE
REF
REF
© 2006 Microchip Technology Inc.
voltage
(V
DD
x = Bit is unknown
CVROE
R/W-0
- 1.4)V for buffered
U-0
—
bit 0