PIC16F677T-E/SS Microchip Technology, PIC16F677T-E/SS Datasheet - Page 107

• 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

8.10.5
The fixed voltage reference is independent of V
a nominal output voltage of 0.6V. This reference can be
enabled by setting the VP6EN bit of the VRCON
register to ‘1’. This reference is always enabled when
the HFINTOSC oscillator is active.
8.10.6
When the Fixed Voltage Reference module is enabled,
it will require some time for the reference and its
amplifier circuits to stabilize. The user program must
include a small delay routine to allow the module to
settle. See the electrical specifications section for the
minimum delay requirement.
FIGURE 8-8:
© 2008 Microchip Technology Inc.
To Comparators
and ADC Module
V
CV
DD
To Comparators
and ADC Module
REF (1)
Fixed Ref
FIXED VOLTAGE REFERENCE
FIXED VOLTAGE REFERENCE
STABILIZATION PERIOD
COMPARATOR VOLTAGE REFERENCE BLOCK DIAGRAM
C2VREN
C1VREN
8R
0.6V
PIC16F631/677/685/687/689/690
15
Analog
0
MUX
4
R
VR<3:0>
DD
Fixed Voltage
Reference
, with
(1)
R
EN
16 Stages
Note 1: Care should be taken to ensure V
8.10.7
Multiplexers on the output of the Voltage Reference
module enable selection of either the CV
voltage reference for use by the comparators.
Setting the C1VREN bit of the VRCON register enables
current to flow in the CV
the CV
bit selects the fixed voltage for use by C1.
Setting the C2VREN bit of the VRCON register enables
current to flow in the CV
the CV
bit selects the fixed voltage for use by C2.
When both the C1VREN and C2VREN bits are cleared,
current flow in the CV
minimizing the power drain of the voltage reference
peripheral.
REF
REF
R
within the comparator Common mode input
range. See Section 17.0 “Electrical Specifica-
tions” for more detail.
voltage for use by C1. Clearing the C1VREN
voltage for use by C2. Clearing the C2VREN
VOLTAGE REFERENCE
SELECTION
R
REF
REF
REF
Sleep
HFINTOSC enable
VP6EN
voltage divider is disabled
voltage divider and selects
voltage divider and selects
8R
DS41262E-page 105
REF
REF
remains
V
or fixed
RR