PIC16F914-E/PT Microchip Technology, PIC16F914-E/PT Datasheet - Page 5
![IC,MICROCONTROLLER,8-BIT,PIC CPU,CMOS,TQFP,44PIN,PLASTIC](/photos/6/82/68251/c04-076_pt_sml.jpg)
PIC16F914-E/PT
Manufacturer Part Number
PIC16F914-E/PT
Description
IC,MICROCONTROLLER,8-BIT,PIC CPU,CMOS,TQFP,44PIN,PLASTIC
Manufacturer
Microchip Technology
Series
PIC® 16Fr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PIC16F913-ISS.pdf
(330 pages)
3.PIC16F913-ISS.pdf
(8 pages)
4.PIC16F913-ISS.pdf
(34 pages)
Specifications of PIC16F914-E/PT
Rohs Compliant
YES
Core Processor
PIC
Core Size
8-Bit
Speed
20MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, LCD, POR, PWM, WDT
Number Of I /o
35
Program Memory Size
7KB (4K x 14)
Program Memory Type
FLASH
Eeprom Size
256 x 8
Ram Size
256 x 8
Voltage - Supply (vcc/vdd)
2 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Package / Case
44-TQFP, 44-VQFP
Processor Series
PIC16F
Core
PIC
Data Bus Width
8 bit
Data Ram Size
256 B
Interface Type
SSP, I2C, AUSART, SPI
Maximum Clock Frequency
20 MHz
Number Of Programmable I/os
35
Number Of Timers
2
Operating Supply Voltage
2 V to 5.5 V
Maximum Operating Temperature
+ 125 C
Mounting Style
SMD/SMT
3rd Party Development Tools
52715-96, 52716-328, 52717-734
Development Tools By Supplier
PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, DV164120, DM163029
Minimum Operating Temperature
- 40 C
On-chip Adc
8
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC16F914-E/PT
Manufacturer:
Microchip Technology
Quantity:
10 000
4. Module: Timer0 and WDT Prescaler
© 2009 Microchip Technology Inc.
A spurious Reset may occur if the Timer0/Watch-
dog Timer (WDT) prescaler is assigned from the
WDT to Timer0 and then back to the WDT.
Summary
The issue only arises when all of the below
conditions are met:
• Timer0 external clock input (TOCKI) is enabled.
• The Prescaler is assigned to the WDT, then to
• During the assignments, the T0CKI pin is high
• The 1:1 Prescaler option is chosen.
Description
On a POR, the Timer0/WDT prescaler is assigned
to the WDT.
If the prescaler is reassigned to Timer0 and Timer0
external clock input (TOCKI) is enabled then the
prescaler would be clocked by a transition on the
TOCKI pin.
On power-up, the TOCKI pin is (by default)
enabled for Timer0 in the OPTION register.
If the T0CKI pin is:
• High and Timer0 is configured to transition on a
• Low and Timer0 is configured to transition on a
Then, if the prescaler is reassigned to the WDT, a
clock pulse to the prescaler will be generated on
the reassignment.
If the prescaler is configured for the 1:1 option, the
clock pulse will incorrectly cause a WDT Time-out
Reset of the device.
Work around
2.
3.
1.
the Timer0 and back to the WDT.
when bit TOSE is set, or low when TOSE is
clear.
falling edge (TOSE set), or
rising edge (TOSE clear)
Disable the Timer0 external clock input by
clearing the TOCKI bit in the OPTION
register.
Modify the TOSE bit in the OPTION register to
the opposite configuration for the logic level
on the T0CKI pin.
Select a prescaler rate other than 1:1 and
issue a CLRWDT instruction before switching
to the final prescaler rate.
Assignment Spurious Reset
Affected Silicon Revisions
PIC16F913/914
PIC16F916/917
PIC16F946
A0
A0
A0
X
X
X
A1
A1
A1
X
X
X
PIC16F91X/946
A2
A2
A2
X
X
X
A3
B0
X
X
B1
X
B2
DS80238C-page 5
X
B3
X