ST92F120 Datasheet, PDF (305/320 Pages) STMicroelectronics – 8/16-BIT FLASH MCU FAMILY WITH RAM, EEPROM AND J1850 BLPD

ST92F120 - ELECTRICAL CHARACTERISTICS
EXTENDED FUNCTION TIMER EXTERNAL TIMING TABLE
(V_DD = 5V ± 10%, T_A = –40°C to +105°C, C_Load = 50pF, f_INTCLK = 24MHz, unless otherwise specified)
N° Symbol
Parameter
Value
Formula ⁽¹⁾
Min
Unit
1 Tw_PEWL External Clock low pulse width (EXTCLK)
-
2 x Tck + 10 ns
2 Tw_PEWH External Clock high pulse width (EXTCLK)
-
2 x Tck + 10 ns
3 Tw_PIWL Input Capture low pulse width (ICAPx)
-
2 x Tck + 10 ns
4 Tw_PIWH Input Capture high pulse width (ICAPx)
-
2 x Tck + 10 ns
5 Tw_ECKD Distance between two active edges on EXTCLK
≥ 4 x Tck + 10
177
ns
6 Tw_EICD Distance between two active edges on ICAPx
2 x Tck x Prsc +10
177
ns
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 24MHz, and minimum
prescaler factor (=2).
Measurement points are V_IH for positive pulses and V_IL for negative pulses.
(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 = Precsaler factor defined by Extended Function Timer Clock Control bits (CC1,CC0) on control register CR2 (values: 2,4,8).
EXTENDED FUNCTION TIMER EXTERNAL TIMING
1
2
EXTCLK
ICAPA
ICAPB
5
3
4
6
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