參數(shù)資料
型號: HD40A4638R
廠商: Hitachi,Ltd.
英文描述: 4-Bit Single-Chip Microcomputer(4位單片微計算機(jī))
中文描述: 4位單片機(jī)(4位單片微計算機(jī))
文件頁數(shù): 63/133頁
文件大?。?/td> 803K
代理商: HD40A4638R
HD404639R Series
63
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 52 and 59)
Note:
256 clock cycles
256 clock cycles
Free-running timer
Toggle output waveform (timers B, C, and D)
PWM output waveform (timers C and D)
(256 – N) clock cycles (256 – N) clock cycles
Reload timer
Figure 43 Timer Output Waveform
Registers for Timer B Operation
: By using the following registers, timer B operation modes are selected
and the timer B count is read and written.
Timer mode register B1 (TMB1: $009)
Timer mode register B2 (TMB2: $013)
Timer write register B (TWBL: $00A, TWBU: $00B)
Timer read register B (TRBL: $00A, TRBU: $00B)
Port mode register C (PMRC: $025)
Timer mode register B1 (TMB1: $009): 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 44.
It is reset to $0 by MCU reset.
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