
HD404358 Series
49
Writing to this register is valid from the second instruction execution cycle after the execution of the
previous timer mode register B1 write instruction. Setting timer B’s initialization by writing to timer
write register B (TWBL: $00A, TWBU: $00B) must be done after a mode change becomes valid.
When selecting the input capture timer operation, select the internal clock as the input clock source.
Bit
Initial value
Read/Write
Bit name
3
0
W
TMB13
2
0
W
TMB12
0
0
W
TMB10
1
0
W
TMB11
Timer mode register B1 (TMB1: $009)
0
1
0
1
0
1
0
1
0
1
0
1
0
1
2048t
cyc
512t
cyc
128t
cyc
32t
cyc
8t
cyc
4t
cyc
2t
cyc
TMB12
TMB10
TMB11
Input Clock Period and Input
Clock Source
D
2
/EVNB (external event input)
TMB13
0
1
Free-Running/Reload
Timer Selection
Free-running timer
Reload timer
Figure 33 Timer Mode Register B1 (TMB1)