PIC16F677T-E/SS Microchip Technology, PIC16F677T-E/SS Datasheet - Page 106

IC,MICROCONTROLLER,8-BIT,PIC CPU,CMOS,SSOP,20PIN,PLASTIC

PIC16F677T-E/SS

Manufacturer Part Number
PIC16F677T-E/SS
Description
IC,MICROCONTROLLER,8-BIT,PIC CPU,CMOS,SSOP,20PIN,PLASTIC
Manufacturer
Microchip Technology
Series
PIC® 16Fr

Specifications of PIC16F677T-E/SS

Rohs Compliant
YES
Mfg Application Notes
Intro to Capacitive Sensing Appl Notes Layout and Physical Design Appl Note
Core Processor
PIC
Core Size
8-Bit
Speed
20MHz
Connectivity
I²C, SPI
Peripherals
Brown-out Detect/Reset, POR, WDT
Number Of I /o
18
Program Memory Size
3.5KB (2K x 14)
Program Memory Type
FLASH
Eeprom Size
256 x 8
Ram Size
128 x 8
Voltage - Supply (vcc/vdd)
2 V ~ 5.5 V
Data Converters
A/D 12x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Package / Case
20-SSOP
Processor Series
PIC16F
Core
PIC
Data Bus Width
8 bit
Data Ram Size
128 B
Interface Type
SSP
Maximum Clock Frequency
20 MHz
Number Of Programmable I/os
18
Number Of Timers
2
Operating Supply Voltage
2 V to 5.5 V
Maximum Operating Temperature
+ 125 C
Mounting Style
SMD/SMT
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
10 bit, 12 Channel
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
XLT20SS1-1 - SOCKET TRANSITION 20DIP 20SSOPDM164125 - BOARD DEMO PICDEM TOUCH SENSE 1AC162061 - HEADER INTRFC MPLAB ICD2 20PIN
Lead Free Status / Rohs Status
 Details
PIC16F631/677/685/687/689/690
8.10
The comparator voltage reference module provides an
internally generated voltage reference for the compara-
tors. The following features are available:
• Independent from Comparator operation
• Two 16-level voltage ranges
• Output clamped to V
• Ratiometric with V
• Fixed Reference (0.6)
The VRCON register (Register 8-5) controls the
Voltage Reference module shown in Figure 8-8.
8.10.1
The comparator voltage reference is independent of
the comparator configuration. Setting the VREN bit of
the VRCON register will enable the voltage reference.
8.10.2
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 8-1:
The full range of V
the construction of the module. See Figure 8-8.
DS41262E-page 104
V
V
CV
RR
RR
REF
REF
=
=
Comparator Voltage Reference
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
REF
=
=
SS
DD
(VR<3:0>/24)
(V
to V
CV
SS
DD
DD
/4) +
REF
cannot be realized due to
OUTPUT VOLTAGE
(VR<3:0> V
×
V
DD
×
DD
/32)
8.10.3
The CV
power consumption by clearing the VP6EN bit of the
VRCON register.
This allows the comparator to detect a zero-crossing
while not consuming additional CV
8.10.4
The comparator voltage reference is V
therefore, the CV
V
Voltage Reference can be found in Section 17.0
“Electrical 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
© 2008 Microchip Technology Inc.
REF
module current.
DD
SS
derived and

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