參數(shù)資料
型號: HD4074654S
廠商: Hitachi,Ltd.
英文描述: 4-Bit Single-Chip Microcomputer
中文描述: 4位單片機
文件頁數(shù): 52/109頁
文件大?。?/td> 430K
代理商: HD4074654S
HD404654 Series
52
T
×
(N + 1)
T
×
256
T
T
×
(256 – N)
TMC13 = 0
TMD13 = 0
The waveform is always fixed low when N = $FF.
T:
N:
The value of the timer write register
TMC13 = 1
TMD13 = 1
Input clock period to counter (figures 37 and 44)
Notes:
256 clock cycles
256 clock cycles
Free-running timer
Toggle output waveform (timers C, and D)
PWM output waveform (timers C and D)
(256 – N)
clock cycles
(256 – N)
clock cycles
Reload timer
Figure 36 Timer Output Waveform
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 C1 (TMC1: $00D)
Timer mode register C2 (TMC2: $014)
Timer write register C (TWCL: $00E, TWCU: $00F)
Timer read register C (TRCL: $00E, TRCU: $00F)
Timer mode register C1 (TMC1: $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 37.
It is reset to $0 by MCU reset.
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