PIC16F1936T-E/SO View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC16F1936T-E/SO

28/40/44-Pin Flash-Based, 8-Bit CMOS Microcontrollers with LCD Driver and nanoWatt XLP™ Technology

Microchip Technology 

PIC16F193X/LF193X

8.5.6 OSCTUNE REGISTER

The HFINTOSC and MFINTOSC are factory calibrated

but can be adjusted in software by writing to the

OSCTUNE register (Register 8-3).

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 oscillator

frequency will begin shifting to the new frequency. Code

execution continues during this shift. There is no

indication that the shift has occurred.

The OSCTUNE register applies the same adjustment to

both the HFINTOSC and the MFINTOSC

simultaneously.

OSCTUNE does not affect the LFINTOSC frequency.

Operation of features that depend on the LFINTOSC

clock source frequency, such as the Power-up Timer

(PWRT), Watchdog Timer (WDT), Fail-Safe Clock

Monitor (FSCM) and peripherals, are not affected by the

change in frequency.

REGISTER 8-3: OSCTUNE: OSCILLATOR TUNING REGISTER

U-0

—

bit 7

U-0

R/W-0/0

R/W-0/0

R/W-0/0

R/W-0/0

—

TUN5

TUN4

TUN3

TUN2

R/W-0/0

TUN1

R/W-0/0

TUN0

bit 0

Legend:

R = Readable bit

u = bit is unchanged

‘1’ = Bit is set

W = Writable bit

x = Bit is unknown

‘0’ = Bit is cleared

U = Unimplemented bit, read as ‘0’

-n/n = Value at POR and BOR/Value at all other Resets

bit 7-6

bit 5-0

Unimplemented: Read as ‘0’

TUN<4:0>: Frequency Tuning bits

011111 = Maximum frequency

011110 =

•

•

•

000001 =

000000 = Oscillator module is running at the factory-calibrated frequency.

111111 =

•

•

•

100000 = Minimum frequency

DS41364B-page 114

Preliminary

© 2009 Microchip Technology Inc.

Share Link: