ST92141 STMicroelectronics, ST92141 Datasheet - Page 170
ST92141
Manufacturer Part Number
ST92141
Description
8/16-bit Mcu For 3-phase Ac Motor Control
Manufacturer
STMicroelectronics
Datasheet
1.ST92141.pdf
(179 pages)
- Current page: 170 of 179
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ST92141 - ELECTRICAL CHARACTERISTICS
A/D EXTERNAL TRIGGER TIMING TABLE
(V
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 V
(1) Formula guaranteed by design.
Legend:
Tck = INTCLK period = OSCIN period when OSCIN is not divided by 2;
n = number of autoscanned channels (1
FDF = Frequency Division Factor (ADC prescaler factor), refer to section 7.6.1 on page 147
A/D EXTERNAL TRIGGER TIMING
170/179
N° Symbol
1
2
3
4
DD
1
Tw
= 5V
Tw
Tw
Td
HIGH
LOW
STR
EXT
10%, T
External trigger pulse width
External trigger pulse distance
External trigger active edges distance
EXTRG falling edge and first conversion start
OSCIN period / PLL factor when the PLL is enabled.
2*OSCIN period when OSCIN is divided by 2;
A
=
–
40°C to +85°C, C
Parameter
n
8)
IH
-V
IH
Load
for positive pulse and V
= 50pF, f
INTCLK
138 x n x FDF x Tck
IL
Formula
-V
0.5 x Tck
1.5 x Tck
1.5 x Tck
1.5 x Tck
= 25MHz, unless otherwise specified)
IL
for negative pulse
(1)
Value (Note)
n x FDF x 5.52
Min.
60
60
20
Max.
60
-
-
-
Unit
ns
ns
ns
s
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