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PIC12F683 Datasheet(PDF) 79 Page - Microchip Technology

Part # PIC12F683
Description  8-Pin Flash-Based, 8-Bit CMOS Microcontrollers with nanoWatt Technology
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC12F683 Datasheet(HTML) 79 Page - Microchip Technology

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 2004 Microchip Technology Inc.
Preliminary
DS41211B-page 77
PIC12F683
12.2
Calibration Bits
The Brown-out Detect (BOD), Power-on Reset (POR)
and 8 MHz internal oscillator (HFINTOSC) are factory
calibrated. These calibration values are stored in the
Calibration Word register, as shown in Register 12-2
and are mapped in program memory location 2008h.
The Calibration Word register is not erased when the
device is erased when using the procedure described
in the “PIC12F6XX/16F6XX Memory Programming
Specification” (DS41204). Therefore, it is not neces-
sary to store and reprogram these values when the
device is erased.
REGISTER 12-2:
CALIB – CALIBRATION WORD (ADDRESS: 2008h)
Note:
Address 2008h is beyond the user program
memory space. It belongs to the special
configuration
memory
space
(2000h-
3FFFh), which can be accessed only during
programming. See “PIC12F6XX/16F6XX
Memory
Programming
Specification”
(DS41204) for more information.
—
FCAL6 FCAL5
FCAL4
FCAL3
FCAL2
FCAL1 FCAL0
—
POR1
POR0
BOD2
BOD1
BOD0
bit 13
bit 0
bit 13
Unimplemented: Read as ‘0’
bit 12-6
FCAL<6:0>: Internal Oscillator Calibration bits
0111111
= Maximum frequency
.
.
0000001
0000000
= Center frequency
1111111
.
.
1000000
= Minimum frequency
bit 5
Unimplemented: Read as ‘0’
bit 4-3
POR<1:0>: POR Calibration bits
00
= Lowest POR voltage
11
= Highest POR voltage
bit 2-0
BOD<2:0>: BOD Calibration bits
000
= Reserved
001
= Lowest BOD voltage
111
= Highest BOD voltage
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
- n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown


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