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HD404848FS bảng dữ liệu(PDF) 63 Page - Renesas Technology Corp

tên linh kiện HD404848FS
Giải thích chi tiết về linh kiện  4-Bit Single-Chip Microcomputer
PDF  127 Pages
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nhà sản xuất  RENESAS [Renesas Technology Corp]
Trang chủ  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HD404848FS bảng dữ liệu(HTML) 63 Page - Renesas Technology Corp

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HD404849 Series
61
T
× (N + 1)
T
× 256
T
T
× (256 – N)
TMC13 = 0
The waveform is always fixed low when N = $FF.
T:
N:
TMC13 = 1
Input clock period to counter (the clock source and frequency
division ratio are controlled in timer mode registers B1, C1, and D1)
The value in timer write registers C and D
Note:
TMD13 = 0
(free-running timer setting)
256 clock cycles
256 clock cycles
Free-running timer
(1) Toggle output waveform (timers B, C, and D)
(2) PWM output waveform (timers C and D)
(256 – N)
clock cycles
(256 – N)
clock cycles
Reload timer
TMD13 = 1
(reload timer setting)
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 prescaler division ratio as shown in figure 44. It is reset to $0 by
MCU reset.



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