參數(shù)資料
型號(hào): HD40A4639R
廠商: Hitachi,Ltd.
英文描述: 4-Bit Single-Chip Microcomputer(4位單片微計(jì)算機(jī))
中文描述: 4位單片機(jī)(4位單片微計(jì)算機(jī))
文件頁數(shù): 64/133頁
文件大小: 803K
代理商: HD40A4639R
HD404639R Series
64
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.
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
R3
3
/
EVNB
(external event input)
TMB12
TM
TMB11
Input clock period and input
TMB13
0
1
Free-running/reload
timer selection
Free-running timer
Reload timer
Figure 44 Timer Mode Register B1 (TMB1)
Timer mode register B2 (TMB2: $013): Two-bit read/write register that selects the timer B output
mode as shown in figure 45. It is reset to $0 by MCU reset.
Bit
Initial value
Read/Write
Bit name
3
Not used
2
Not used
0
0
R/W
TMB20
1
0
R/W
TMB21
Timer mode register B2 (TMB2: $013)
TMB21
0
1
TMB20
0
1
0
1
R3
0
/TOB mode selection
R3
0
TOB
TOB
TOB
R3
0
port
Toggle output
0 output
1 output
Figure 45 Timer Mode Register B2 (TMB2)
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