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ST92141 bảng dữ liệu(PDF) 170 Page - STMicroelectronics

tên linh kiện ST92141
Giải thích chi tiết về linh kiện  8/16-BIT MCU FOR 3-PHASE AC MOTOR CONTROL
PDF  179 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
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ST92141 bảng dữ liệu(HTML) 170 Page - STMicroelectronics

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ST92141 - ELECTRICAL CHARACTERISTICS
A/D EXTERNAL TRIGGER TIMING TABLE
(VDD = 5V ± 10%, TA = –40°C to +85°C, CLoad = 50pF, fINTCLK = 25MHz, unless otherwise specified)
Note: The value in the left hand column shows the formula used to calculate the timing minimum or maximum from the oscillator clock period,
standard timer prescaler and counter programmed values.
The value in the right hand two columns show the timing minimum and maximum for an internal clock (INTCLK) at 25MHz.
Measurement points are taken with reference to VIH-VIH for positive pulse and VIL-VIL for negative pulse
(1) Formula guaranteed by design.
Legend:
Tck = INTCLK period = OSCIN period when OSCIN is not divided by 2;
2*OSCIN period when OSCIN is divided by 2;
OSCIN period / PLL factor when the PLL is enabled.
n = number of autoscanned channels (1
≤ n ≤ 8)
FDF = Frequency Division Factor (ADC prescaler factor), refer to section 7.6.1 on page 147
A/D EXTERNAL TRIGGER TIMING
N°
Symbol
Parameter
Value (Note)
Unit
Formula(1)
Min.
Max.
1TwLOW
External trigger pulse width
≥ 1.5 x Tck
60
-
ns
2TwHIGH
External trigger pulse distance
≥ 1.5 x Tck
60
-
ns
3TwEXT
External trigger active edges distance
≥ 138 x n x FDF x Tck n x FDF x 5.52
-
µs
4TdSTR
EXTRG falling edge and first conversion start
0.5 x Tck
1.5 x Tck
20
60
ns
1



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