PIC16F873-04I/SO Microchip Technology, PIC16F873-04I/SO Datasheet - Page 187

• Manufacturer Part Number: PIC16F873-04I/SO
• Description: IC MCU FLASH 4KX14 EE 28SOIC
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F873-04I/SO

• Core Size: 8-Bit
• Program Memory Size: 7KB (4K x 14)
• Core Processor: PIC
• Speed: 4MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 22
• Program Memory Type: FLASH
• Eeprom Size: 128 x 8
• Ram Size: 192 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 5x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-SOIC (7.5mm Width)
• Controller Family/series: PIC16F
• No. Of I/o's: 22
• Eeprom Memory Size: 128Byte
• Ram Memory Size: 192Byte
• Cpu Speed: 4MHz
• No. Of Timers: 3
• Package: 28SOIC W
• Device Core: PIC
• Family Name: PIC16
• Maximum Speed: 4 MHz
• Operating Supply Voltage: 5 V
• Data Bus Width: 8 Bit
• Number Of Programmable I/os: 22
• Interface Type: I2C/SPI/USART
• On-chip Adc: 5-chx10-bit
• Number Of Timers: 3
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: XLT28SO-1 - SOCKET TRANSITION 28SOIC 300MIL309-1073 - ADAPTER 28-SOIC TO 28-SOIC309-1024 - ADAPTER 28-SOIC TO 28-DIP309-1023 - ADAPTER 28-SOIC TO 28-DIP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

12.6
1997 Microchip Technology Inc.
Timer1 Oscillator
A crystal oscillator circuit is built in between pins T1OSI (input) and T1OSO (amplifier output). It
is enabled by setting the T1OSCEN control bit (T1CON<3>). The oscillator is a low power
oscillator, rated up to 200 kHz operation. It will continue to run during SLEEP. It is primarily
intended for a 32 kHz crystal, which is an ideal frequency for real-time keeping.
the capacitor selection for the Timer1 oscillator.
The Timer1 oscillator is identical to the LP oscillator. The user must provide a software time delay
to ensure proper oscillator start-up.
Table 12-1: Capacitor Selection for the Timer1 Oscillator
Crystals Tested:
32.768 kHz
100 kHz
200 kHz
Note 1: Higher capacitance increases the stability of oscillator but also increases the start-up
Note:
2: Since each resonator/crystal has its own characteristics, the user should consult the
Osc Type
time.
resonator/crystal manufacturer for appropriate values of external components.
LP
This allows the counter to operate (increment) when the device is in sleep mode,
which allows Timer1 to be used as a real-time clock.
Epson C-001R32.768K-A
Epson C-2 100.00 KC-P
STD XTL 200.000 kHz
100 kHz
200 kHz
32 kHz
Freq
Section 12. Timer1
33 pF
15 pF
15 pF
C1
DS31012A-page 12-7
20 PPM
20 PPM
20 PPM
Table 12-1
33 pF
15 pF
15 pF
C2
shows
12