PIC16F684-E/P Microchip Technology, PIC16F684-E/P Datasheet - Page 62

• Manufacturer Part Number: PIC16F684-E/P
• Description: IC PIC MCU FLASH 2KX14 14DIP
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F684-E/P

• Program Memory Type: FLASH
• Program Memory Size: 3.5KB (2K x 14)
• Package / Case: 14-DIP (0.300", 7.62mm)
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 12
• Eeprom Size: 256 x 8
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Processor Series: PIC16F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 128 B
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 12
• Number Of Timers: 3
• Operating Supply Voltage: 2 V to 5.5 V
• Maximum Operating Temperature: + 125 C
• Mounting Style: Through Hole
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, DM163014, DM164120-4
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8-ch x 10-bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: DM163029 - BOARD PICDEM FOR MECHATRONICSACICE0207 - MPLABICE 14P 300 MIL ADAPTER
• Connectivity: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

PIC16F684
8.6
The comparator module also allows the selection of an
internally generated voltage reference for one of the
comparator inputs. The VRCON register (Register 8-3)
controls the voltage reference module shown in
Figure 8-6.
8.6.1
The voltage reference can output 32 distinct voltage
levels, 16 in a high range and 16 in a low range.
The following equation determines the output voltages:
EQUATION 8-1:
FIGURE 8-6:
DS41202C-page 60
VRR = 1 (low range): CV
VRR = 0 (high range):
V
DD
Comparator
CV
Comparator Reference
CV
REF
CONFIGURING THE VOLTAGE
REFERENCE
REF
VREN
Input
= (V
to
DD
/4) + (VR3:VR0
COMPARATOR VOLTAGE REFERENCE BLOCK DIAGRAM
REF
VR3:VR0
16-1 Analog
= (VR3:VR0/24)
8R
MUX
X
V
DD
R
/32)
VREN
VR3:VR0 = ‘0000’
VRR
X
V
DD
Preliminary
R
16 Stages
8.6.2
The full range of V
the construction of the module. The transistors on the
top and bottom of the resistor ladder network
(Figure 8-6) keep CV
V
clearing the VREN bit (VRCON<7>). When disabled,
the reference voltage is V
and the VRR (VRCON<5>) bit is set. This allows the
comparators to detect a zero-crossing and not
consume CV
The voltage reference is V
CV
tested absolute accuracy of the comparator voltage
Reference can be found in Section 15.0 “Electrical
Specifications”.
DD
REF
. The exception is when the module is disabled by
R
output changes with fluctuations in V
VOLTAGE REFERENCE
ACCURACY/ERROR
REF
R
module current.
SS
to V
REF
 2004 Microchip Technology Inc.
DD
DD
SS
from approaching V
8R
cannot be realized due to
derived and therefore, the
when VR<3:0> is ‘0000’
VRR
DD
SS
. The
or