HD404459 Datasheet, PDF (65/122 Pages) Renesas Technology Corp – 4-bit HMCS400-series microcomputers

HD404459 Series
The mode change of 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.
Timer mode register B1 (TMB1: $009)
Bit
Initial value
Read/Write
Bit name
3
0
W
TMB13
2
0
W
TMB12
1
0
W
TMB11
0
0
W
TMB10
Free-running/reload
TMB13 timer selection
0
Free-running timer
1
Reload timer
Input clock period and input
TMB12 TMB11 TMB10 clock source
0
0
0
2048t_cyc
1
512t_cyc
1
0
128t_cyc
1
32t_cyc
1
0
0
8t_cyc
1
4t_cyc
1
0
2t_cyc
1
R3₃/EVNB (external event input)
Figure 45 Timer Mode Register B1 (TMB1)
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