PIC16LF870T-I/SS Microchip Technology, PIC16LF870T-I/SS Datasheet - Page 91
![no-image](/images/manufacturer_photos/0/4/439/microchip_technology_sml.jpg)
PIC16LF870T-I/SS
Manufacturer Part Number
PIC16LF870T-I/SS
Description
IC,MICROCONTROLLER,8-BIT,PIC CPU,CMOS,SSOP,28PIN,PLASTIC
Manufacturer
Microchip Technology
Series
PIC® 16Fr
Specifications of PIC16LF870T-I/SS
Rohs Compliant
YES
Core Processor
PIC
Core Size
8-Bit
Speed
20MHz
Connectivity
UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
22
Program Memory Size
3.5KB (2K x 14)
Program Memory Type
FLASH
Eeprom Size
64 x 8
Ram Size
128 x 8
Voltage - Supply (vcc/vdd)
2 V ~ 5.5 V
Data Converters
A/D 5x10b
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
28-SSOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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11.2
11.2.1
The PIC16F870/871 can be operated in four different
Oscillator modes. The user can program two configura-
tion bits (FOSC1 and FOSC0) to select one of these
four modes:
• LP
• XT
• HS
• RC
11.2.2
In XT, LP or HS modes, a crystal or ceramic resonator
is connected to the OSC1/CLKI and OSC2/CLKO pins
to establish oscillation (Figure 11-1). The PIC16F870/
871 oscillator design requires the use of a parallel cut
crystal. Use of a series cut crystal may give a frequency
out of the crystal manufacturers specifications. When in
XT, LP or HS modes, the device can have an external
clock source to drive the OSC1/CLKI pin (Figure 11-2).
FIGURE 11-1:
2003 Microchip Technology Inc.
Note 1:
C1
C2
2:
3:
Oscillator Configurations
(1)
(1)
Low Power Crystal
Crystal/Resonator
High Speed Crystal/Resonator
Resistor/Capacitor
CRYSTAL OSCILLATOR/CERAMIC
RESONATORS
OSCILLATOR TYPES
See Table 11-1 and Table 11-2 for
recommended values of C1 and C2.
A series resistor (R
AT strip cut crystals.
RF varies with the crystal chosen.
XTAL
R
s
(2)
OSC1
OSC2
CRYSTAL/CERAMIC
RESONATOR OPERATION
(HS, XT OR LP
OSC CONFIGURATION)
s
RF
) may be required for
(3)
PIC16F870/871
SLEEP
To
Internal
Logic
FIGURE 11-2:
TABLE 11-1:
All resonators used did not have built-in capacitors.
16.0 MHz
These values are for design guidance only.
See notes following Table 11-2.
455 kHz
2.0 MHz
4.0 MHz
8.0 MHz
Clock from
Ext. System
Mode
HS
XT
Panasonic EFO-A455K04B
Murata Erie CSA16.00MX
16.0 MHz
Murata Erie CSA2.00MG
Murata Erie CSA4.00MG
Murata Erie CSA8.00MT
Open
455 kHz
2.0 MHz
4.0 MHz
8.0 MHz
PIC16F870/871
Freq.
Resonators Used:
CERAMIC RESONATORS
Ranges Tested:
EXTERNAL CLOCK INPUT
OPERATION (HS, XT OR LP
OSC CONFIGURATION)
68 - 100 pF
OSC1
OSC2
15 - 68 pF
15 - 68 pF
10 - 68 pF
10 - 22 pF
OSC1
PIC16F870/871
DS30569B-page 89
68 - 100 pF
15 - 68 pF
15 - 68 pF
10 - 68 pF
10 - 22 pF
OSC2
0.3%
0.5%
0.5%
0.5%
0.5%
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