PIC16F874A-I/P Microchip Technology, PIC16F874A-I/P Datasheet - Page 64

• Manufacturer Part Number: PIC16F874A-I/P
• Description: IC MCU FLASH 4KX14 EE 40DIP
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F874A-I/P

• Core Size: 8-Bit
• Program Memory Size: 7KB (4K x 14)
• Core Processor: PIC
• Speed: 20MHz
• 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): 4 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 40-DIP (0.600", 15.24mm)
• Controller Family/series: PIC16F
• No. Of I/o's: 33
• Eeprom Memory Size: 128Byte
• Ram Memory Size: 192Byte
• Cpu Speed: 20MHz
• No. Of Timers: 3
• Processor Series: PIC16F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 192 B
• Interface Type: I2C, SPI, USART
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 33
• Number Of Timers: 3
• Operating Supply Voltage: 2 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, DM163022, DV164120
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 8 Channel
• Data Rom Size: 128 B
• Height: 3.81 mm
• Length: 52.26 mm
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 4 V
• Width: 13.84 mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 444-1001 - DEMO BOARD FOR PICMICRO MCU
• Lead Free Status / Rohs Status: Details
• Other names: PIC16F874AI/P

PIC16F87XA
7.1
The prescaler and postscaler counters are cleared
when any of the following occurs:
• a write to the TMR2 register
• a write to the T2CON register
• any device Reset (POR, MCLR Reset, WDT
TMR2 is not cleared when T2CON is written.
TABLE 7-1:
DS39582B-page 62
0Bh, 8Bh,
10Bh, 18Bh
0Ch
8Ch
11h
12h
92h
Legend:
Note 1:
Address
Reset or BOR)
Timer2 Prescaler and Postscaler
x = unknown, u = unchanged, - = unimplemented, read as ‘0’. Shaded cells are not used by the Timer2 module.
Bits PSPIE and PSPIF are reserved on 28-pin devices; always maintain these bits clear.
INTCON
PIR1
PIE1
TMR2
T2CON
PR2
Name
REGISTERS ASSOCIATED WITH TIMER2 AS A TIMER/COUNTER
PSPIE
Timer2 Module’s Register
Timer2 Period Register
PSPIF
Bit 7
GIE
—
(1)
(1)
TOUTPS3 TOUTPS2 TOUTPS1 TOUTPS0 TMR2ON T2CKPS1 T2CKPS0 -000 0000 -000 0000
PEIE
ADIF
ADIE
Bit 6
TMR0IE
RCIE
RCIF
Bit 5
INTE
Bit 4
TXIF
TXIE
SSPIF
SSPIE
RBIE
Bit 3
7.2
The output of TMR2 (before the postscaler) is fed to the
SSP module, which optionally uses it to generate the
shift clock.
TMR0IF
CCP1IF
CCP1IE
Bit 2
Output of TMR2
TMR2IF
TMR2IE
INTF
Bit 1
 2003 Microchip Technology Inc.
TMR1IF 0000 0000 0000 0000
TMR1IE 0000 0000 0000 0000
Bit 0
RBIF
0000 000x 0000 000u
0000 0000 0000 0000
1111 1111 1111 1111
POR, BOR
Value on:
Value on
all other
Resets