PIC16F785-I/SO Microchip Technology, PIC16F785-I/SO Datasheet - Page 27

• Manufacturer Part Number: PIC16F785-I/SO
• Description: IC PIC MCU FLASH 2KX14 20SOIC
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F785-I/SO

• Program Memory Type: FLASH
• Program Memory Size: 3.5KB (2K x 14)
• Package / Case: 20-SOIC (7.5mm Width)
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 17
• Eeprom Size: 256 x 8
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Data Converters: A/D 14x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: PIC16F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 128 B
• Interface Type: RS- 232/USB
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 17
• Number Of Timers: 3
• Operating Supply Voltage: 2 V to 5.5 V
• Maximum Operating Temperature: + 85 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, DV164120, DM163029
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 14-ch x 10-bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: XLT20SO1-1 - SOCKET TRANS ICE 20DIP TO 20SOICXLT18SO-1 - SOCKET TRANSITION 18SOIC 300MILAC162060 - HEADER INTRFC MPLAB ICD2 20PINAC164039 - MODULE SKT PROMATE II 20DIP/SOIC
• Connectivity: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

3.3.3
The LP, XT and HS modes support the use of quartz
crystal resonators or ceramic resonators connected to
the OSC1 and OSC2 pins (Figure 3-1). The mode
selects a low, medium, or high gain setting of the
internal inverter-amplifier to support various resonator
types and speed.
LP oscillator mode selects the lowest gain setting of the
internal inverter-amplifier. LP mode current consump-
tion is the least of the three modes. This mode is best
suited to drive resonators with a low drive level specifi-
cation, for example, tuning fork type crystals.
XT oscillator mode selects the intermediate gain setting
of the internal inverter-amplifier. XT mode current con-
sumption is the medium of the three modes. This mode
is best suited to drive resonators with a medium drive
level specification, for example, AT-cut quartz crystal
resonators.
HS oscillator mode selects the highest gain setting of
the internal inverter-amplifier. HS mode current con-
sumption is the highest of the three modes. This mode
is best suited for resonators that require a high drive
setting, for example, AT-cut quartz crystal resonators or
ceramic resonators.
Figure 3-3 and Figure 3-4 show typical circuits for
quartz crystal and ceramic resonators, respectively.
FIGURE 3-3:
 2004 Microchip Technology Inc.
Note 1: Quartz
Note 1: A series resistor (R
2: Always verify oscillator performance over
C1
2: The value of R
C2
LP, XT, HS MODES
according to type, package and manufac-
turer. The user should consult the manu-
facturer data sheets for specifications and
recommended application.
the V
expected for the application.
quartz crystals with low drive level.
mode selected (typically between 2 M
10 M
Quartz
Crystal
R
DD
S (1)
.
OSC1
OSC2
and temperature range that is
crystal
QUARTZ CRYSTAL
OPERATION (LP, XT OR
HS MODE)
F
varies with the Oscillator
R
S
F
characteristics
(2)
) may be required for
PIC16F785
To Internal
Logic
Sleep
vary
to
Preliminary
FIGURE 3-4:
Note 1: A series resistor (R
C1
C2 Ceramic
2: The value of R
3: An additional parallel feedback resistor (R
Resonator
ceramic resonators with low drive level.
mode selected (typically between 2 M
10 M
may be required for proper ceramic resonator
operation (typical value 1 M ).
R
.
P
R
OSC1
(3)
OSC2
S
(1)
CERAMIC RESONATOR
OPERATION
(XT OR HS MODE)
PIC16F785
F
varies with the oscillator
R
S
F (2)
) may be required for
DS41249A-page 25
PIC16F785
To Internal
Logic
Sleep
P
to
)