Microchip Technology MA330016 Data Sheet

DS70290J-page 106

© 2007-2011 Microchip Technology Inc.

     

 

U-0

U-0

U-0

U-0

U-0

U-0

U-0

U-0

—

—

—

—

—

—

—

—

bit 15

bit 8

U-0

U-0

R/W-0

R/W-0

R/W-0

R/W-0

R/W-0

R/W-0

—

—

TUN<5:0>

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 15-6

Unimplemented: Read as ‘0’

bit 5-0

TUN<5:0>: FRC Oscillator Tuning bits

111111 = Center frequency - 0.375% (7.345 MHz) 
   •
   •
   •
100001 = Center frequency - 11.625% (6.52 MHz) 
100000 = Center frequency - 12% (6.49 MHz)
011111 = Center frequency + 11.625% (8.23 MHz)
011110 = Center frequency + 11.25% (8.20 MHz)
   •
   •
   •
000001 = Center frequency + 0.375% (7.40 MHz) 
000000 = Center frequency (7.37 MHz nominal)

Note 1: The OSCTUN functionality has been provided to help customers compensate for temperature effects on 

the FRC frequency over a wide range of temperatures. The tuning step size is an approximation and is 
neither characterized nor tested.

2: This register is reset only on a Power-on Reset (POR).