CALIB

Crystal Frequency Calibration

This register stores the error value and the type of correction to be done. This register is written by software with any error value based on external calibration and/or temperature correction/s.

Name:: CALIB
Offset:: 0x06
Reset:: 0x00
Access:: -

Bit7	6	5	4	3	2	1	0
SIGN	ERROR[6:0]
AccessR/W	R/W	R/W	R/W	R/W	R/W	R/W	R/W
Reset0	0	0	0	0	0	0	0

Bit 7 – SIGN: Error Correction Sign Bit

Error Correction Sign Bit

This bit is used to indicate the direction of the correction.

Value	Description
0x0	Positive correction causing prescaler to count slower.
0x1	Negative correction causing prescaler to count faster. Requires that prescaler configuration is set to minimum DIV2.

Bits 6:0 – ERROR[6:0]: Error Correction Value

Error Correction Value

The number of correction clocks for each million RTC clock cycles interval (ppm).