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IMX7DCEC bảng dữ liệu(PDF) 105 Page - NXP Semiconductors

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Giải thích chi tiết về linh kiện  i.MX 7Dual Family of Applications Processors Datasheet
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IMX7DCEC bảng dữ liệu(HTML) 105 Page - NXP Semiconductors

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Electrical characteristics
i.MX 7Dual Family of Applications Processors Datasheet, Rev. 7, 09/2023
NXP Semiconductors
105
4.10.8.9 Low-power receiver timing
Input Glitch Rejection of Low-Power Receivers
4.10.9 PCIe PHY parameters
The PCIe interface is designed to be compatible with PCIe specification Gen2 x1 lane and supports the
PCI Express 1.1/2.0 standard.
4.10.9.1 PCIE_REXT reference resistor connection
The impedance calibration process requires connection of reference resistor 4.7 k 1% precision resistor
on PCIE_REXT pads to ground. It is used for termination impedance calibration.
4.10.10 Pulse width modulator (PWM) timing parameters
This section describes the electrical information of the PWM. The PWM can be programmed to select one
of three clock signals as its source frequency. The selected clock signal is passed through a prescaler before
being input to the counter. The output is available at the pulse-width modulator output (PWMO) external
pin.
Figure 70 depicts the timing of the PWM, and Table 78 lists the PWM timing parameters.
Figure 70. PWM Timing
Table 78. PWM output timing parameters
ID
Parameter
Min
Max
Unit
PWM Module Clock Frequency
0
ipg_clk
MHz
2*TLPX
2*TLPX
TMIN-RX
TMIN-RX
eSPIKE
eSPIKE
Input
Output
VIH
VIL



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