PIC16LF874A-I/L Microchip Technology, PIC16LF874A-I/L Datasheet - Page 147

• Manufacturer Part Number: PIC16LF874A-I/L
• Description: IC MCU FLASH 4KX14 EE A/D 44PLCC
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16LF874A-I/L

• Core Size: 8-Bit
• Program Memory Size: 7KB (4K x 14)
• Core Processor: PIC
• Speed: 10MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 33
• Program Memory Type: FLASH
• Eeprom Size: 128 x 8
• Ram Size: 192 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-PLCC
• Controller Family/series: PIC16LF
• No. Of I/o's: 33
• Eeprom Memory Size: 128Byte
• Ram Memory Size: 192Byte
• Cpu Speed: 20MHz
• No. Of Timers: 3
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: PIC16LF874A-I/LR; PIC16LF874A-I/LR; PIC16LF874AI/L

14.2
14.2.1
The PIC16F87XA can be operated in four different
oscillator modes. The user can program two configura-
tion bits (F
modes:
• LP
• XT
• HS
• RC
14.2.2
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 14-1). The PIC16F87XA
oscillator design requires the use of a parallel cut crys-
tal. Use of a series cut crystal may give a frequency out
of the crystal manufacturer’s specifications. When in
XT, LP or HS modes, the device can have an external
clock source to drive the OSC1/CLKI pin (Figure 14-2).
FIGURE 14-1:
 2003 Microchip Technology Inc.
Note 1: See Table 14-1 and Table 14-2 for recommended
2: A series resistor (R
3: RF varies with the crystal chosen.
C1
C2
Oscillator Configurations
(1)
(1)
values of C1 and C2.
OSC
strip cut crystals.
Low-Power Crystal
Crystal/Resonator
High-Speed Crystal/Resonator
Resistor/Capacitor
CRYSTAL OSCILLATOR/CERAMIC
RESONATORS
OSCILLATOR TYPES
1 and F
XTAL
R
s
(2)
OSC1
OSC2
OSC
CRYSTAL/CERAMIC
RESONATOR OPERATION
(HS, XT OR LP
OSC CONFIGURATION)
0) to select one of these four
s
) may be required for AT
RF
(3)
PIC16F87XA
Sleep
To
Internal
Logic
FIGURE 14-2:
TABLE 14-1:
All resonators used did not have built-in capacitors.
16.0 MHz
These values are for design guidance only.
See notes following Table 14-2.
2.0 MHz
4.0 MHz
8.0 MHz
Clock from
Ext. System
Mode
HS
XT
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
Freq.
Resonators Used:
CERAMIC RESONATORS
Ranges Tested:
PIC16F87XA
EXTERNAL CLOCK INPUT
OPERATION (HS, XT OR
LP OSC CONFIGURATION)
OSC1
OSC2
68-100 pF
15-68 pF
15-68 pF
10-68 pF
10-22 pF
OSC1
PIC16F87XA
DS39582B-page 145
68-100 pF
15-68 pF
15-68 pF
10-68 pF
10-22 pF
OSC2
0.5%
0.5%
0.5%
0.5%