LAPIS Semiconductor ML610421, Руководство пользователя, Страница: 116 / 437

ML610Q421/ML610Q422/ML610421 User’s Manual
Chapter 7 Time Base Counter
7 – 6
7.2.4 Low-Speed Time Base Counter Frequency Adjustment Registers L and H (LTBADJL, LTBADJH)
Address: 0F00CH
Access: R/W
Access size: 8/16 bits
Initial value: 00H
7 6 5 4 3 2 1 0
LTBADJL LADJ7 LADJ6 LADJ5 LADJ4 LADJ3 LADJ2 LADJ1 LADJ0
R/W R/W R/W R/W R/W R/W R/W R/W R/W
Initial value 0 0 0 0 0 0 0 0
Address: 0F00DH
Access: R/W
Access size: 8 bits
Initial value: 00H
7 6 5 4 3 2 1 0
LTBADJH
    
LADJS LADJ9 LADJ8
R/W R/W R/W R/W R/W R/W R/W R/W R/W
Initial value 0 0 0 0 0 0 0 0
LTBADJL and LTBADJH are special function registers (SFRs) to set the frequency adjustment values of the low-speed
time base clock.
[Description of Bits]
•
LADJS, LADJ9-LADJ8 (bits 2-0) LADJ7-LADJ0 (bits 7-0)
The LADJS and LADJ9 to LADJ0 bits are used to adjust frequency.
Adjustment range:
Approx.
−
488ppm to +488ppm.
Adjustment accuracy: Approx. 0.48ppm
See Section 7.3.3, “Low-Speed Time Base Counter Frequency Adjustment Function” for the correspondence between
the frequency adjustment values (LTBADJH, LTBADJL) and adjustment ratio.