Microchip Technology MCU PIC10F322T-I/OT SOT-23-6 MCP PIC10F322T-I/OT データシート

 2011 Microchip Technology Inc.

DS41585A-page 85

The Fixed Voltage Reference, or FVR, is a stable
voltage reference, independent of V

DD

, with 1.024V,

2.048V or 4.096V selectable output levels. The output
of the FVR can be configured to supply a reference
voltage to the following:
• ADC input channel
The FVR can be enabled by setting the FVREN bit of
the FVRCON register.

The output of the FVR supplied to the ADC is routed
through an independent programmable gain amplifier.
The amplifier can be configured to amplify the
reference voltage by 1x, 2x or 4x, to produce the three
possible voltage levels.
The ADFVR<1:0> bits of the FVRCON register are
used to enable and configure the gain amplifier settings
for the reference supplied to the ADC module. Refer-
ence 

 for additional information.

When the Fixed Voltage Reference module is enabled, it
requires time for the reference and amplifier circuits to
stabilize. Once the circuits stabilize and are ready for use,
the FVRRDY bit of the FVRCON register will be set. See

 for the

minimum delay requirement.

FVR 

(To ADC Module)

  x1
  x2
  x4

+

-

FVREN

FVRRDY

2

ADFVR<1:0>

Any peripheral requiring 

the Fixed Reference

HFINTOSC

FOSC = 1

EC on CLKIN pin.

BOR

BOREN<1:0> = 11

BOR always enabled.

BOREN<1:0> = 10 and BORFS = 1

BOR disabled in Sleep mode, BOR Fast Start enabled.

BOREN<1:0> = 01 and BORFS = 1

BOR under software control, BOR Fast Start enabled.

IVR

All PIC10F320/322 devices, when 
VREGPM1 = 1 and not in Sleep

The device runs off of the Power-Save mode regulator when 
in Sleep mode.