PIC16F721-E/ML Microchip Technology, PIC16F721-E/ML Datasheet - Page 87

• Manufacturer Part Number: PIC16F721-E/ML
• Description: 7 KB FLASH, 256 B SRAM, 18 I/O 20 QFN 4x4mm TUBE
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 16Fr

Specifications of PIC16F721-E/ML

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 17
• Program Memory Size: 7KB (4K x 14)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 12x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

10.0
This device contains an internal voltage regulator. To
provide a reference for the regulator, a band gap refer-
ence is provided. This band gap is also user accessible
via an A/D converter channel.
User level band gap functions are controlled by the
FVRCON register, which is shown in
REGISTER 10-1:
TABLE 10-1:
 2010 Microchip Technology Inc.
bit 7
Legend:
R = Readable bit
-n = Value at POR
q = Value depends on condition
bit 7
bit 6
bit 5
bit 4
bit 3-2
bit 1-0
Note 1:
FVRCON
Legend:
Name
FVRRDY
R-q
2:
3:
FIXED VOLTAGE REFERENCE
FVRRDY is always ‘1’ for the PIC16F720/721 devices.
Fixed Voltage Reference output cannot exceed V
See
x = unknown, u = unchanged, — = unimplemented read as ‘0’, q = value depends on condition. Shaded cells are not
used for ADC module.
FVRRDY
Bit 7
Section 11.0 “Temperature Indicator Module”
FVRRDY
0 = Fixed Voltage Reference output is not active or stable
1 = Fixed Voltage Reference output is ready for use
FVREN
0 = Fixed Voltage Reference is disabled
1 = Fixed Voltage Reference is enabled
TSEN: Temperature Indicator Enable bit
0 = Temperature indicator is disabled
1 = Temperature indicator is enabled
TSRNG: Temperature Indicator Range Selection bit
0 = V
1 = V
Unimplemented: Read as ‘0’
ADFVR<1:0>: A/D Converter Fixed Voltage Reference Selection bits
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)
SUMMARY OF ASSOCIATED FIXED VOLTAGE REFERENCE REGISTERS
FVREN
R/W-0
OUT
OUT
FVRCON: FIXED VOLTAGE REFERENCE REGISTER
FVREN
(2)
Bit 6
(1)
: Fixed Voltage Reference Enable bit
= V
= V
: Fixed Voltage Reference Ready Flag bit
DD
DD
W = Writable bit
‘1’ = Bit is set
TSEN
- 4VT (High Range)
- 2VT (Low Range)
Bit 5
R/W-0
TSEN
Register
TSRNG
Bit 4
10-1.
TSRNG
R/W-0
Bit 3
—
(3)
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
DD
.
Bit 2
U-0
—
—
for additional information.
(3)
PIC16F/LF720/721
ADFVR1
Bit 1
U-0
—
ADFVR0 q000 --00 q000 --00
Bit 0
x = Bit is unknown
ADFVR1
R/W-0
POR, BOR
Value on
(2)
(2)
DS41430A-page 87
ADFVR0
Value on
all other
R/W-0
Resets
bit 0