Reset signal circuit on independent network card
By introducing the SGM811B-SXKA4G/TR microprocessor monitoring chip onto the independent network card, the timing problem of the independent network card reset signal was solved, and the normal reset of the independent network card was realized, meeting the timing requirements of the WX1820AL network chip.
Patent Information
- Application Number
- CN202422839711.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-21
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-11-21
AI Technical Summary
The timing of the reset signal of a standalone network card is difficult to meet strict requirements, and existing technologies cannot effectively solve this problem.
The SGM811B-SXKA4G/TR microprocessor monitoring chip is used as the reset signal source for the WX1820AL network chip. By utilizing its 200ms power-on reset delay time and combining capacitor and resistor design, a reset signal that meets the timing requirements is generated.
It enables the independent network card to reset normally, meets the reset signal timing requirements of the WX1820AL network chip, and avoids dependence on the motherboard PCIe reset signal.
Smart Images
Figure CN223526688U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to electronic computer technical field especially, relate to a reset signal circuit on independent network card. BACKGROUND
[0002] Independent function board card is the chip and related device are made into a board card independent of computer mainboard, become professional hardware equipment.
[0003] When involving independent function board card, the power and signal on the board card are generally limited by the number of board card connector pins, whether the corresponding signal is provided on the connected computer mainboard, etc., and some board cards need signals that are limited by timing, and the mainboard often cannot meet the requirements.
[0004] Like the reset signal on the board card, if it is a standard PCIE (peripheral component interconnect express) board card, then the reset using the PCIE signal from the computer mainboard can be used, but some chips on the board card have their own reset signals, and some reset signals have strict requirements on timing, so targeted design is needed to solve this problem.
[0005] PCIE independent network card is the mainstream product of PCIE board card in the market at present, and the utility model provides a reset signal circuit on independent network card for PCIE independent network card. SUMMARY
[0006] Therefore, the purpose of the utility model is to provide a reset signal circuit on independent network card, which solves the reset signal timing problem of independent network card.
[0007] To achieve the above purpose, the utility model provides a reset signal circuit on independent network card, which comprises: WX1820AL network chip as independent network card control chip, and microprocessor monitoring chip for providing reset signal to WX1820AL network chip, wherein the microprocessor monitoring chip itself has sufficient power-on reset delay time; the power supply pin of the microprocessor monitoring chip is electrically connected to the power supply circuit on the independent network card, and the reset signal output pin of the microprocessor monitoring chip is electrically connected to the reset signal input pin of the WX1820AL network chip.
[0008] Among them, the microprocessor monitoring chip is SGM811B-SXKA4G / TR chip.
[0009] Among them, the power supply pin of the SGM811B-SXKA4G / TR chip is electrically connected to the 3.3V power supply on the independent network card.
[0010] The power supply pin of the SGM811B-SXKA4G / TR chip is grounded via the first capacitor.
[0011] The capacitance value of the first capacitor is 0.1 microfarad.
[0012] The reset signal output pin of the SGM811B-SXKA4G / TR chip is grounded via the first resistor.
[0013] The resistance value of the first resistor is 100 kilo-ohm.
[0014] The reset signal output pin of the SGM811B-SXKA4G / TR chip is grounded via the second capacitor.
[0015] The capacitance value of the second capacitor is 1 microfarad.
[0016] In conclusion, the reset signal circuit on the independent network card makes the independent network card not use the PCIE reset signal on the mainboard as the network chip reset signal to normally reset work. BRIEF DESCRIPTION OF DRAWINGS
[0017] The technical scheme and other beneficial effects of the present application will be apparent from the following detailed description of the specific embodiments of the present application, combined with the accompanying drawings. In the drawings,
[0018] Figure 1 FIG. 1 is a circuit diagram of a preferred embodiment of the reset signal circuit on the independent network card of the present application;
[0019] Figure 2 FIG. 1 is a circuit diagram of a preferred embodiment of the reset signal circuit on the independent network card of the present application; DETAILED DESCRIPTION
[0020] Referring to Figure 1 FIG. 1 is a circuit diagram of a preferred embodiment of the reset signal circuit on the independent network card of the present application, Figure 1The element of the successful bid NS represents no piece, position reservation, in this preferred embodiment, the reset signal circuit on the independent network card of the utility model mainly comprises: WX1820AL network chip (not shown in the figure) as the independent network card control chip, and microprocessor monitoring chip SGM811B-SXKA4G / TR providing reset signal to WX1820AL network chip, both are marketable chips, wherein SGM811B-SXKA4G / TR chip itself has sufficient power-on reset delay time, specifically about 200 ms;The power supply pin VCC of the microprocessor monitoring chip SGM811B-SXKA4G / TR is electrically connected to the power supply circuit on the independent network card, and is used for inputting 3.3V power supply on the independent network card in this embodiment, the reset signal output pin reset# of the microprocessor monitoring chip SGM811B-SXKA4G / TR is electrically connected to the reset signal input pin of WX1820AL network chip to output reset signal nRST to it.The power supply circuit on the independent network card can adopt the conventional design in the art, which will not be repeated here.
[0021] In this preferred embodiment, in order to improve stability, the power supply pin VCC of SGM811B-SXKA4G / TR chip is grounded through the first capacitor C29, and the capacitance value of the first capacitor C29 is 0.1 microfarad;The reset signal output pin reset# of SGM811B-SXKA4G / TR chip is grounded through the first resistor R49, and the resistance value of the first resistor R49 is 100 kilo-ohm;The reset signal output pin reset# of SGM811B-SXKA4G / TR chip is also grounded through the second capacitor C30, and the capacitance value of the second capacitor C30 is 1 microfarad.
[0022] This scheme uses WX1820AL network chip to make a gigabit independent network card, and the reset signal of WX1820AL network chip requires at least 10 ms to pull high after PCIE reset signal pull high, so it is difficult to meet the timing requirements with RC delay circuit when designing independently on board.So this scheme increases SGM811B-SXKA4G / TR microprocessor monitoring chip to reset WX1820AL chip, and SGM811B-SXKA4G / TR itself is a reset chip with 200 ms power-on delay, so it can meet the requirements.
[0023] Referring to Figure 2It is a logic diagram of a preferred embodiment of the reset signal circuit on the independent network card. The power supply circuit on the independent network card starts to work after the independent network card receives the PCIE reset signal of the mainboard, supplies power to the SGM811B-SXKA4G / TR chip, generates a reset signal nRST from the SGM811B-SXKA4G / TR chip, and provides the reset signal to the WX1820AL network chip as the reset signal of the WX1820AL network chip.
[0024] In conclusion, the reset signal circuit on the independent network card makes the independent network card not use the PCIE reset signal on the mainboard as the reset signal of the network chip to normally reset work.
[0025] The above description is for the ordinary skilled in the art, and various corresponding changes and deformations can be made according to the technical scheme and technical concept of the utility model, and all the changes and deformations shall belong to the protection scope of the claims attached to the utility model.
Claims
1. A reset signal circuit on a standalone network card, characterized by, Comprise: The WX1820AL network chip is an independent network card control chip, and a microprocessor monitoring chip provides a reset signal for the WX1820AL network chip, and the microprocessor monitoring chip itself has sufficient power-on reset delay time; a power supply pin of the microprocessor monitoring chip is electrically connected to a power supply circuit on the independent network card, and a reset signal output pin of the microprocessor monitoring chip is electrically connected to a reset signal input pin of the WX1820AL network chip.
2. The reset signal circuit on a stand-alone network card of claim 1, wherein, The microprocessor monitoring chip is an SGM811B-SXKA4G / TR chip.
3. The reset signal circuit on a stand-alone network card of claim 2, wherein, The power supply pin of the SGM811B-SXKA4G / TR chip is electrically connected to a 3.3V power supply on the independent network card.
4. The reset signal circuit on a stand-alone network card of claim 3, wherein, The power supply pin of the SGM811B-SXKA4G / TR chip is grounded through a first capacitor.
5. The reset signal circuit on a stand-alone network card of claim 4, wherein, The capacitance value of the first capacitor is 0.1 microfarad.
6. The reset signal circuit on a stand-alone network card of claim 2, wherein, The reset signal output pin of the SGM811B-SXKA4G / TR chip is grounded through a first resistor.
7. The reset signal circuit on a stand-alone network card of claim 6, wherein, The resistance value of the first resistor is 100 kilo-ohms.
8. The reset signal circuit on a stand-alone network card of claim 2, wherein, The reset signal output pin of the SGM811B-SXKA4G / TR chip is grounded through a second capacitor.
9. The reset signal circuit on a stand-alone network card of claim 8, wherein, The capacitance value of the second capacitor is 1 microfarad.