PIC16F648A-I/SO Microchip Technology, PIC16F648A-I/SO Datasheet - Page 98
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PIC16F648A-I/SO
Manufacturer Part Number
PIC16F648A-I/SO
Description
IC MCU FLASH 4KX14 EEPROM 18SOIC
Manufacturer
Microchip Technology
Series
PIC® 16Fr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PIC16F627A-IP.pdf
(180 pages)
3.PIC16F627A-IP.pdf
(8 pages)
4.PIC16F627A-IP.pdf
(22 pages)
5.PIC16F627A-ISO.pdf
(168 pages)
Specifications of PIC16F648A-I/SO
Program Memory Type
FLASH
Program Memory Size
7KB (4K x 14)
Package / Case
18-SOIC (7.5mm Width)
Core Processor
PIC
Core Size
8-Bit
Speed
20MHz
Connectivity
UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
16
Eeprom Size
256 x 8
Ram Size
256 x 8
Voltage - Supply (vcc/vdd)
3 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Processor Series
PIC16F
Core
PIC
Data Bus Width
8 bit
Data Ram Size
256 B
Interface Type
SCI/USART
Maximum Clock Frequency
20 MHz
Number Of Programmable I/os
16
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, DM163014, DM164120-4
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
XLT18SO-1 - SOCKET TRANSITION 18SOIC 300MILI3DBF648 - BOARD DAUGHTER ICEPIC3AC164010 - MODULE SKT PROMATEII DIP/SOIC
Data Converters
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC16F648A-I/SO
Manufacturer:
MICROCHIP
Quantity:
4 500
PIC16F627A/628A/648A
FIGURE 14-2:
Figure 14-3 shows a series resonant oscillator circuit.
This circuit is also designed to use the fundamental
frequency of the crystal. The inverter performs a 180
phase shift in a series resonant oscillator circuit. The
330 k resistors provide the negative feedback to bias
the inverters in their linear region.
FIGURE 14-3:
14.2.4
The internal precision oscillator provides a fixed 4 MHz
(nominal) system clock at V
Section 17.0 "Electrical Specifications", for informa-
tion on variation over voltage and temperature.
14.2.5
For applications where a clock is already available
elsewhere, users may directly drive the PIC16F627A/
628A/648A provided that this external clock source
meets the AC/DC timing requirements listed in
Section 17.6 "Timing Diagrams and Specifica-
tions". Figure 14-4 below shows how an external clock
circuit should be configured.
DS40044B-page 96
10K
74AS04
330 K
+5V
10K
C1
74AS04
XTAL
4.7K
PRECISION INTERNAL 4 MH
OSCILLATOR
EXTERNAL CLOCK IN
0.1 PF
XTAL
C2
74AS04
330 K
10K
EXTERNAL PARALLEL
RESONANT CRYSTAL
OSCILLATOR CIRCUIT
EXTERNAL SERIES
RESONANT CRYSTAL
OSCILLATOR CIRCUIT
74AS04
DD
TO OTHER
DEVICES
74AS04
= 5 V and 25 C. See
PIC16F627A/628A/648A
TO OTHER
CLKIN
DEVICES
PIC16F627A/
628A/648A
Z
CLKIN
Preliminary
FIGURE 14-4:
14.2.6
For applications where precise timing is not a require-
ment, the RC oscillator option is available. The
operation and functionality of the RC oscillator is
dependent upon a number of variables. The RC
oscillator frequency is a function of:
• Supply voltage
• Resistor (R
• Operating temperature.
The oscillator frequency will vary from unit to unit due
to normal process parameter variation. The difference
in lead frame capacitance between package types will
also affect the oscillation frequency, especially for low
C
tolerance of the external R and C components.
Figure 14-5 shows how the R/C combination is
connected.
FIGURE 14-5:
The RC Oscillator mode has two options that control
the unused OSC2 pin. The first allows it to be used as
a general purpose I/O port. The other configures the
pin as an output providing the Fosc signal (internal
clock divided by 4) for test or external synchronization
purposes.
14.2.7
The PIC16F627A/628A/648A can be configured to
provide a clock out signal by programming the configu-
ration word. The oscillator frequency, divided by 4 can
be used for test purposes or to synchronize other logic.
C
EXT
V
R
EXT
SS
EXT
Clock From
ext. system
F
values. The user also needs to account for the
V
OSC
DD
RA6
/4
RC OSCILLATOR
CLKOUT
EXT
CLKIN
RA7/OSC1/
RA6/OSC2/CLKOUT
) and capacitor (C
PIC16F627A/628A/648A
EXTERNAL CLOCK INPUT
OPERATION (EC, HS, XT
OR LP OSC
CONFIGURATION)
RC OSCILLATOR MODE
2004 Microchip Technology Inc.
RA6/OSC2/CLKOUT
RA7/OSC1/CLKIN
PIC16F627A/628A/648A
EXT
) values
Internal
Clock