參數(shù)資料
型號: ST92E141K4D1
廠商: STMICROELECTRONICS
元件分類: 微控制器/微處理器
英文描述: 16-BIT, UVPROM, 25 MHz, MICROCONTROLLER, CDIP32
封裝: WINDOWED, SHRINK, CERAMIC, DIP-32
文件頁數(shù): 75/178頁
文件大?。?/td> 1097K
代理商: ST92E141K4D1
166/178
ST92141 - ELECTRICAL CHARACTERISTICS
EXTENDED FUNCTION TIMER EXTERNAL TIMING TABLE
(VDD =5V ± 10%, TA = 40°C to +105°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, and minimum
prescaler factor (=2).
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 x OSCIN period when OSCIN is divided by 2;
OSCIN period x PLL factor when the PLL is enabled.
Prsc = Prescaler factor defined by Extended Function Timer Clock Control bits (CC1,CC0) on control register CR2 (values: 2,4,8).
EXTENDED FUNCTION TIMER EXTERNAL TIMING
N
°
Symbol
Parameter
Value
Unit
Formula(1)
Min
1TwPEWL
External Clock low pulse width (EXTCLK)
2 x Tck + 10
90
ns
2TwPEWH
External Clock high pulse width (EXTCLK)
2 x Tck + 10
90
ns
3TwPIWL
Input Capture low pulse width (ICAPx)
2 x Tck + 10
90
ns
4TwPIWH
Input Capture high pulse width (ICAPx)
2 x Tck + 10
90
ns
5TwECKD
Distance between two active edges on EXTCLK
≥ 4 x Tck + 10
170
ns
6TwEICD
Distance between two active edges on ICAPx
2 x Tck x Prsc +10
170
ns
12
5
EXTCLK
34
6
ICAPA
ICAPB
1
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