PIC12F635-E/MF Microchip Technology, PIC12F635-E/MF Datasheet - Page 145
![no-image](/images/manufacturer_photos/0/4/439/microchip_technology_sml.jpg)
PIC12F635-E/MF
Manufacturer Part Number
PIC12F635-E/MF
Description
IC MCU FLASH 1KX14 8DFN
Manufacturer
Microchip Technology
Series
PIC® 12Fr
Specifications of PIC12F635-E/MF
Core Processor
PIC
Core Size
8-Bit
Speed
20MHz
Peripherals
Brown-out Detect/Reset, POR, WDT
Number Of I /o
5
Program Memory Size
1.75KB (1K x 14)
Program Memory Type
FLASH
Eeprom Size
128 x 8
Ram Size
64 x 8
Voltage - Supply (vcc/vdd)
2 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Package / Case
8-DFN
For Use With
AC164324 - MODULE SKT FOR MPLAB 8DFN/16QFNXLT08DFN2 - SOCKET TRANSITION ICE 14DIP/8DFNAC162057 - MPLAB ICD 2 HEADER 14DIPXLT08DFN - SOCKET TRANSITION ICE 8DFNAC164032 - ADAPTER PICSTART PLUS 8DFN/DIPAC124001 - MODULE SKT PROMATEII 8DIP/SOIC
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Data Converters
-
Connectivity
-
- Current page: 145 of 234
- Download datasheet (4Mb)
12.11 Watchdog Timer (WDT)
The PIC12F635/PIC16F636/639 WDT is code and
functionally compatible with other PIC16F WDT
modules and adds a 16-bit prescaler to the WDT. This
allows the user to have a scaler value for the WDT and
TMR0 at the same time. In addition, the WDT time-out
value can be extended to 268 seconds. WDT is cleared
under certain conditions described in Table 12-7.
12.11.1
The WDT derives its time base from the 31 kHz
LFINTOSC. The LTS bit does not reflect that the
LFINTOSC is enabled.
The value of WDTCON is ‘---0 1000’ on all Resets.
This gives a nominal time base of 16 ms, which is
compatible with the time base generated with previous
PIC12F635/PIC16F636/639 microcontroller versions.
FIGURE 12-9:
TABLE 12-7:
© 2007 Microchip Technology Inc.
WDTE = 0
CLRWDT Command
Oscillator Fail Detected
Exit Sleep + System Clock = T1OSC, EXTRC, HFINTOSC, EXTCLK
Exit Sleep + System Clock = XT, HS, LP
LFINTOSC Clock
Note:
Note 1: This is the shared Timer0/WDT prescaler. See Section 5.1.3 “Software Programmable Prescaler” for more information.
31 kHz
WDT OSCILLATOR
When the Oscillator Start-up Timer (OST)
is invoked, the WDT is held in Reset,
because the WDT Ripple Counter is used
by the OST to perform the oscillator delay
count. When the OST count has expired,
the WDT will begin counting (if enabled).
WDT STATUS
WATCHDOG TIMER BLOCK DIAGRAM
Conditions
WDTE from Configuration Word Register
SWDTEN from WDTCON
16-bit WDT Prescaler
WDTPS<3:0>
From TMR0 Clock Source
PIC12F635/PIC16F636/639
A new prescaler has been added to the path between
the INTRC and the multiplexers used to select the path
for the WDT. This prescaler is 16 bits and can be
programmed to divide the INTRC by 32 to 65536,
giving the WDT a nominal range of 1 ms to 268s.
12.11.2
The WDTE bit is located in the Configuration Word
register. When set, the WDT runs continuously.
When the WDTE bit in the Configuration Word register
is set, the SWDTEN bit of the WDTCON register has no
effect. If WDTE is clear, then the SWDTEN bit can be
used to enable and disable the WDT. Setting the bit will
enable it and clearing the bit will disable it.
The PSA and PS<2:0> bits of the OPTION register
have the same function as in previous versions of the
PIC16F family of microcontrollers. See Section 5.0
“Timer0 Module” for more information.
0
1
WDT CONTROL
PSA
Cleared until the end of OST
WDT Time-out
0
Prescaler
Cleared
WDT
1
8
DS41232D-page 143
(1)
PS<2:0>
To TMR0
PSA
Related parts for PIC12F635-E/MF
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![PIC12F635-I/SN](/images/manufacturer_photos/0/4/439/microchip_technology_tmb.jpg)
Part Number:
Description:
IC MCU FLASH 1KX14 8SOIC
Manufacturer:
Microchip Technology
Datasheet:
![PIC12F635-I/P](/images/manufacturer_photos/0/4/439/microchip_technology_tmb.jpg)
Part Number:
Description:
IC MCU FLASH 1KX14 8DIP
Manufacturer:
Microchip Technology
Datasheet:
![PIC12F635-I/MD](/images/manufacturer_photos/0/4/439/microchip_technology_tmb.jpg)
Part Number:
Description:
IC PIC MCU FLASH 1KX14 8DFN
Manufacturer:
Microchip Technology
Datasheet:
![PIC12F635-E/MD](/images/no-image3.png)
Part Number:
Description:
8/14-Pin, Flash-Based 8-Bit CMOS Microcontrollers with nanoWatt Technology
Manufacturer:
MICROCHIP [Microchip Technology]
Datasheet:
![PIC12F635-E/P](/images/manufacturer_photos/0/4/439/microchip_technology_tmb.jpg)
Part Number:
Description:
IC MCU FLASH 1KX14 8DIP
Manufacturer:
Microchip Technology
Datasheet:
![PIC12F635-I/MF](/images/manufacturer_photos/0/4/439/microchip_technology_tmb.jpg)
Part Number:
Description:
IC MCU FLASH 1KX14 8DFN
Manufacturer:
Microchip Technology
Datasheet:
![PIC12F635-E/SN](/images/manufacturer_photos/0/4/439/microchip_technology_tmb.jpg)
Part Number:
Description:
IC,MICROCONTROLLER,8-BIT,PIC CPU,CMOS,SOP,8PIN,PLASTIC
Manufacturer:
Microchip Technology
Datasheet:
![PIC12F639](/images/manufacturer_photos/0/4/439/microchip_technology_tmb.jpg)
Part Number:
Description:
(PIC12F635 / PIC12F636 / PIC12F639) 8/14-PIN FLASH-BASED / 8-BIT CMOS MICROCONTROLLERS WITH NANOWATT TECHNOLOGY
Manufacturer:
Microchip Technology
Datasheet:
![PIC12F1840-I/P](/photos/16/3/160349/pdip8_tmb.jpg)
Part Number:
Description:
7 KB Flash, 256 Bytes RAM, 32 MHz Int. Osc, 6 I/0, Enhanced Mid Range Core 8 PDI
Manufacturer:
Microchip Technology
Datasheet:
![PIC12LF1840-I/MF](/photos/16/0/160077/dfn8_tmb.jpg)
Part Number:
Description:
7 KB Flash, 256 Bytes RAM, 32 MHz Int. Osc, 6 I/0, Enhanced Mid Range Core, Nano
Manufacturer:
Microchip Technology
Datasheet:
![PIC12F1840-I/MF](/photos/16/0/160077/dfn8_tmb.jpg)
Part Number:
Description:
7 KB Flash, 256 Bytes RAM, 32 MHz Int. Osc, 6 I/0, Enhanced Mid Range Core 8 DFN
Manufacturer:
Microchip Technology
![PIC12F1840-I/SN](/photos/16/3/160347/soic8_tmb.jpg)
Part Number:
Description:
7 KB Flash, 256 Bytes RAM, 32 MHz Int. Osc, 6 I/0, Enhanced Mid Range Core 8 SOI
Manufacturer:
Microchip Technology
![PIC12LF1840-E/MF](/photos/16/0/160077/dfn8_tmb.jpg)
Part Number:
Description:
7 KB Flash, 256 Bytes RAM, 32 MHz Int. Osc, 6 I/0, Enhanced Mid Range Core, Nano
Manufacturer:
Microchip Technology
Datasheet:
![PIC12LF1840-E/P](/photos/16/3/160349/pdip8_tmb.jpg)
Part Number:
Description:
7 KB Flash, 256 Bytes RAM, 32 MHz Int. Osc, 6 I/0, Enhanced Mid Range Core, Nano
Manufacturer:
Microchip Technology
Datasheet:
![PIC12LF1840-E/SN](/photos/16/3/160347/soic8_tmb.jpg)
Part Number:
Description:
7 KB Flash, 256 Bytes RAM, 32 MHz Int. Osc, 6 I/0, Enhanced Mid Range Core, Nano
Manufacturer:
Microchip Technology
Datasheet: