PIC16F639-E/P Microchip Technology, PIC16F639-E/P Datasheet - Page 85
PIC16F639-E/P
Manufacturer Part Number
PIC16F639-E/P
Description
IC MCU FLASH 2KX14 20DIP
Manufacturer
Microchip Technology
Series
PIC® 16Fr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PIC12F635-ISN.pdf
(234 pages)
3.PIC16F636-ISL.pdf
(8 pages)
4.PIC16F636-ISL.pdf
(4 pages)
5.PIC16F639-ISS.pdf
(6 pages)
Specifications of PIC16F639-E/P
Core Processor
PIC
Core Size
8-Bit
Speed
20MHz
Peripherals
Brown-out Detect/Reset, LVD, POR, WDT
Number Of I /o
11
Program Memory Size
3.5KB (2K x 14)
Program Memory Type
FLASH
Ram Size
128 x 8
Voltage - Supply (vcc/vdd)
2 V ~ 3.6 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Package / Case
20-DIP (0.300", 7.62mm)
For Use With
AC162066 - HEADER INTRFC MPLAB ICD2 20PINAC164039 - MODULE SKT PROMATE II 20DIP/SOICDM163029 - BOARD PICDEM FOR MECHATRONICSACICE0203 - MPLABICE 20P 300 MIL ADAPTER
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Data Converters
-
Connectivity
-
- PIC16F616T-ISL PDF datasheet
- PIC12F635-ISN PDF datasheet #2
- PIC16F636-ISL PDF datasheet #3
- PIC16F636-ISL PDF datasheet #4
- PIC16F639-ISS PDF datasheet #5
- Current page: 85 of 234
- Download datasheet (4Mb)
7.11
The Comparator Voltage Reference module provides
an internally generated voltage reference for the
comparators. The following features are available:
• Independent from Comparator operation
• Two 16-level voltage ranges
• Output clamped to V
• Ratiometric with V
• Fixed Voltage Reference
The VRCON register (Register 7-5) controls the
Voltage Reference module shown in Figure 7-10.
7.11.1
The comparator voltage reference is independent of
the comparator configuration. Setting the VREN bit of
the VRCON register will enable the voltage reference.
7.11.2
The
voltage levels in each range. Range selection is
controlled by the VRR bit of the VRCON register. The
16 levels are set with the VR<3:0> bits of the VRCON
register.
The CV
equations:
EQUATION 7-1:
EQUATION 7-2:
The full range of V
the construction of the module. See Figure 7-10.
© 2007 Microchip Technology Inc.
V
V
V
LADDER
RR
RR
V
V
CV
CV
CV
RR
RR
REF
=
=
REF
REF
REF
=
=
0 (high range):
Comparator Voltage Reference
1 (low range):
CV
CV
0 (high range):
1 (low range):
=
=
INDEPENDENT OPERATION
OUTPUT VOLTAGE SELECTION
=
output voltage is determined by the following
voltage reference has 2 ranges with 16
REF
V
REF
(VR<3:0>/24)
(V
DD
LADDER
=
=
SS
or ([V
DD
(VR<3:0>/24)
(V
to V
CV
(INTERNAL CV
CV
(EXTERNAL CV
SS
DD
/4) +
REF
DD
/4) +
REF
REF
+] - [V
(VR<3:0>
cannot be realized due to
V
OUTPUT VOLTAGE
OUTPUT VOLTAGE
LADDER
(VR<3:0> V
REF
-]) or V
V
DD
REF
V
REF
REF
LADDER
+
)
DD
)
/32)
/32)
PIC12F635/PIC16F636/639
7.11.3
The CV
power consumption by configuring VRCON as follows:
• VREN = 0
• VRR = 1
• VR<3:0> = 0000
This allows the comparator to detect a zero-crossing
while not consuming additional CV
7.11.4
The comparator voltage reference is V
therefore, the CV
V
Voltage Reference can be found in Section 15.0 “Elec-
trical Specifications”.
DD
. The tested absolute accuracy of the Comparator
REF
OUTPUT CLAMPED TO V
OUTPUT RATIOMETRIC TO VDD
output voltage can be set to Vss with no
REF
output changes with fluctuations in
REF
DS41232D-page 83
module current.
DD
SS
derived and
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