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PIC16F616-E/SLSQTP 데이터시트(PDF) 25 Page - Cirrus Logic

부품명 PIC16F616-E/SLSQTP
상세설명  14-Pin Flash-Based, 8-Bit CMOS Microcontrollers
PDF  172 Pages
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제조업체  APEX [Cirrus Logic]
홈페이지  http://www.cirrus.com
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PIC16F616-E/SLSQTP 데이터시트(HTML) 25 Page - Cirrus Logic

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© 2006 Microchip Technology Inc.
Preliminary
DS41288A-page 23
PIC16F616/16HV616
3.4.1.1
OSCTUNE Register
The oscillator is factory calibrated but can be adjusted
in software by writing to the OSCTUNE register
(Register 3-1).
The default value of the OSCTUNE register is ‘0’. The
value is a 5-bit two’s complement number.
When the OSCTUNE register is modified, the frequency
will begin shifting to the new frequency. Code execution
continues during this shift. There is no indication that the
shift has occurred.
TABLE 3-2:
SUMMARY OF REGISTERS ASSOCIATED WITH CLOCK SOURCES
REGISTER 3-1:
OSCTUNE: OSCILLATOR TUNING REGISTER
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
—
—
—
TUN4
TUN3
TUN2
TUN1
TUN0
bit 7
bit 0
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
bit 7-5
Unimplemented: Read as ‘0’
bit 4-0
TUN<4:0>: Frequency Tuning bits
01111
= Maximum frequency
01110
=
•
•
•
00001
=
00000
= Oscillator module is running at the calibrated frequency.
11111
=
•
•
•
10000
= Minimum frequency
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on:
POR, BOR
Value on
all other
Resets(1)
CONFIG(2)
IOSCFS
CP
MCLRE
PWRTE
WDTE
FOSC2
FOSC1
FOSC0
—
—
OSCTUNE
—
—
—
TUN4
TUN3
TUN2
TUN1
TUN0
---0 0000
---u uuuu
Legend:
x
= unknown, u = unchanged, – = unimplemented locations read as ‘0’. Shaded cells are not used by oscillators.
Note
1:
Other (non Power-up) Resets include MCLR Reset and Watchdog Timer Reset during normal operation.
2:
See Configuration Word register (Register 11-1) for operation of all register bits.



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