Low-Speed Time Base Counter Register (Ltbr) - LAPIS Semiconductor ML610472 User Manual

ML610471/472/473/Q471/Q472/Q473 User's Manual
Chapter 7 Time Base Counter

7.2.2 Low-Speed Time Base Counter Register (LTBR)

Address: 0F00AH
Access: R/W
Access size: 8-bit
Initial value: 00H
LTBR T1HZ
R/W
Initial value
LTBR is a special function register (SFR) to read the T128HZ to T1HZ outputs of the low-speed time base counter.
The T128HZ-T1HZ outputs are set to "0" when write operation is performed for LTBR. Write data is invalid.
Note:
A TBC interrupt (128Hz interrupt, 32Hz interrupt, 16Hz interrupt, or 2Hz interrupt) may occur depending on the LTBR
write timing. Take this into consideration when programming your software by referring to "Figure 7-4 Interrupt
Timing and Reset Timing by Writing to LTBR."
7 6
T2HZ T4HZ
R/W R/W R/W
0 0
5 4 3
T8HZ T16HZ
R/W R/W
0 0 0
7-4
2 1
T32HZ T64HZ T128HZ
R/W R/W
0 0
0
R/W
0