PIC16F874A-E/PT Microchip Technology, PIC16F874A-E/PT Datasheet - Page 490
PIC16F874A-E/PT
Manufacturer Part Number
PIC16F874A-E/PT
Description
IC MCU FLASH 4KX14 W/AD 44-TQFP
Manufacturer
Microchip Technology
Series
PIC® 16Fr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PIC16F688T-ISL.pdf
(688 pages)
3.PIC16C770-ISO.pdf
(8 pages)
4.PIC16F873A-ISO.pdf
(234 pages)
5.PIC16F873A-ISO.pdf
(6 pages)
6.PIC16F873A-ISO.pdf
(4 pages)
7.PIC16F873A-ISO.pdf
(6 pages)
8.PIC16F873A-ISO.pdf
(4 pages)
9.PIC16F873A-ISO.pdf
(22 pages)
Specifications of PIC16F874A-E/PT
Core Processor
PIC
Core Size
8-Bit
Speed
20MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
33
Program Memory Size
7KB (4K x 14)
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 ~ 125°C
Package / Case
44-TQFP, 44-VQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC16F874A-E/PT
Manufacturer:
Microchip Technology
Quantity:
10 000
- PIC16F616T-ISL PDF datasheet
- PIC16F688T-ISL PDF datasheet #2
- PIC16C770-ISO PDF datasheet #3
- PIC16F873A-ISO PDF datasheet #4
- PIC16F873A-ISO PDF datasheet #5
- PIC16F873A-ISO PDF datasheet #6
- PIC16F873A-ISO PDF datasheet #7
- PIC16F873A-ISO PDF datasheet #8
- PIC16F873A-ISO PDF datasheet #9
- Current page: 490 of 688
- Download datasheet (3Mb)
PICmicro MID-RANGE MCU FAMILY
26.3.1
26.3.2
DS31026A-page 26-6
Config. bits
OPTION_REG
Legend: Shaded cells are not used by the Watchdog Timer.
Name
WDT Period
WDT Programming Considerations
MPEEN
RBPU
Bit 7
The WDT has a nominal time-out period of 18 ms, (with no postscaler). The time-out period var-
ies with temperature, V
time-outs are desired, a postscaler with a division ratio of up to 1:128 can be assigned to the
WDT, under software control, by writing to the OPTION_REG register. Thus, time-out periods of
up to 2.3 seconds can be realized.
The
and prevent it from timing out and generating a device RESET.
The TO bit in the STATUS register will be cleared upon a Watchdog Timer time-out (WDT Reset
and WDT wake-up).
It should also be taken in account that under worst case conditions (V
ture = Maximum, maximum WDT postscaler) it may take several seconds before a WDT time-out
occurs.
Table 26-1: Summary of Watchdog Timer Registers
Note:
CLRWDT
INTEDG
BODEN
Bit 6
When the postscaler is assigned to the WDT, always execute a CLRWDT instruction
before changing the postscale value, otherwise a WDT reset may occur.
and
SLEEP
DD
instructions clear the WDT and the postscaler (if assigned to the WDT)
T0CS
Bit 5
CP1
and process variations from part to part (see DC specs). If longer
T0SE
Bit 4
CP0
PWRTE
Bit 3
PSA
WDTE
Bit 2
PS2
1997 Microchip Technology Inc.
DD
FOSC1
= Minimum, Tempera-
Bit 1
PS1
FOSC0
Bit 0
PS0
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