參數(shù)資料
型號: HD40A4356S
廠商: Hitachi,Ltd.
英文描述: 66 POS MOLDED PGA SOCKET
中文描述: 4位HMCS400系列微機(jī)
文件頁數(shù): 56/100頁
文件大小: 398K
代理商: HD40A4356S
HD404358 Series
56
Registers for Timer C Operation:
By using the following registers, timer C operation modes are selected
and the timer C count is read and written.
Timer mode register C (TMC: $00D)
Port mode register A (PMRA: $004)
Timer write register C (TWCL: $00E, TWCU: $00F)
Timer read register C (TRCL: $00E, TRCU: $00F)
Timer mode register C (TMC: $00D): Four-bit write-only register that selects the free-running/reload
timer function, input clock source, and the prescaler division ratio as shown in figure 43. It is reset to $0
by MCU reset.
Writing to this register is valid from the second instruction execution cycle after the execution of the
previous timer mode register C write instruction. Setting timer C’s initialization by writing to timer
write register C (TWCL: $00E, TWCU: $00F) must be done after a mode change becomes valid.
Bit
Initial value
Read/Write
Bit name
3
0
W
TMC3
2
0
W
TMC2
0
0
W
TMC0
1
0
W
TMC1
Timer mode register C (TMC: $00D)
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
TMC2
TMC0
TMC1
Input Clock Period
TMC3
0
1
Free-Running/Reload
Timer Selection
Free-running timer
Reload timer
1024t
cyc
Figure 43 Timer Mode Register C (TMC)
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