CN213120623U - Take fingerprint identification function's general measuring instrument - Google Patents
Take fingerprint identification function's general measuring instrument Download PDFInfo
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- CN213120623U CN213120623U CN202021552039.1U CN202021552039U CN213120623U CN 213120623 U CN213120623 U CN 213120623U CN 202021552039 U CN202021552039 U CN 202021552039U CN 213120623 U CN213120623 U CN 213120623U
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- usb
- fingerprint identification
- measuring instrument
- power supply
- management chip
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Abstract
The utility model discloses a take general measuring instrument of fingerprint identification function relates to the electron technical field. Including USB fingerprint identification module, electric connection between USB fingerprint identification module and the measuring instrument HOST computer, the measuring instrument HOST computer includes CPU and USB HOST circuit, electric connection between USB HOST circuit and the CPU, through electric connection between USB socket between USB HOST circuit and the fingerprint identification ware. The USB HOST circuit comprises a filter capacitor, resistors R1-R6, input power supplies of +5V and +3.3V, and a USB HOST power management chip SP 2526A. The utility model provides a general test instrument host computer not support fingerprint identification's problem, saved general test instrument and needed the trouble that manual input password could just manage and call the profile to equipment, also can prevent simultaneously that the manual work from knowing the managerial ability that carries out the maloperation after the password, improved production test efficiency and equipment.
Description
Technical Field
The utility model relates to the field of electronic technology, specifically be a take general measuring instrument of fingerprint identification function.
Background
Fingerprint identification is a high-tech product with closely combined optical and electronic technologies, and is widely applied to daily life, and available biological characteristic identification technologies include fingerprints, human faces, voiceprints, irises and the like, and the fingerprints are one of the most widely applied technologies. At present, most of mobile phones support fingerprint identification, the existing general measuring instruments do not support a fingerprint identification function, a client manages different devices in a using process by setting different passwords, when the managed devices are more, the passwords are easy to be confused, and the embarrassment that an operator sees needs to be placed when the passwords are input, so that unnecessary troubles are caused to the management of the whole device.
SUMMERY OF THE UTILITY MODEL
The utility model provides a not enough to prior art, the utility model provides a take general measuring instrument of fingerprint identification function has solved general measuring instrument host computer and has not supported fingerprint identification's problem, has saved the trouble that general measuring instrument needs manual input password just can manage and call the profile to equipment, also can prevent to carry out the maloperation after the manual work knows the password simultaneously, has improved the managerial ability of production efficiency of software testing and equipment.
In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: the utility model provides a take general measuring instrument of fingerprint identification function, includes USB fingerprint identification module, electric connection between USB fingerprint identification module and the measuring instrument HOST computer, the measuring instrument HOST computer includes CPU and USB HOST circuit, electric connection between USB HOST circuit and the CPU, through electric connection between the USB socket between USB HOST circuit and the fingerprint identification ware.
Preferably, the USB HOST circuit comprises a filter capacitor, resistors R1-R6, input power supplies of +5V and +3.3V, and a USB HOST power management chip SP 2526A.
Preferably, the USB HOST circuit includes a USB power control pin of which the ENA end of the power management chip is connected to the CPU, and an FLGA end of the power management chip is connected to a USB power supply current overrun detection pin of the CPU, and the FLGA end is connected to the first input power supply through a resistor R2; the FLGB end, the ENB end and the OUTB end of the power management chip are floating, the GND end of the power management chip is grounded, the IN end of the power management chip is connected with the input power supply II, a filter capacitor is connected between the IN end and the GND end of the power management chip, and the OUTA end of the power management chip is connected with a USB power state detection pin of the CPU through a resistor R1; the power output end of the USB socket is connected with the OUTA end of the power management chip, the D + end and the D-end of the USB socket are respectively connected with a differential data transmission pin of the CPU through resistors R5 and R6, meanwhile, the D + end and the D-end of the USB socket are respectively grounded through resistors R4 and R3, and the ground end of the USB socket is grounded.
Preferably, the resistance of the resistor R1 is 1k Ω, the resistance of the resistor R2 is 10k Ω, the resistance of R3 and the resistance of R4 are 15k Ω, the resistance of the resistor R5R 6 is 33 Ω, and the capacitance of the capacitor C1 is 0.1 uF.
Preferably, the second input power supply is a +5V input power supply.
Preferably, the input power supply is an input power supply of + 3.3V.
The utility model provides a take fingerprint identification function's general measuring instrument. The method has the following beneficial effects:
(1) the utility model provides a general test instrument host computer not support fingerprint identification's problem, saved general measurement instrument and needed the trouble that manual input password could just manage and call the profile to equipment, also can prevent simultaneously that the manual work from knowing the managerial ability that carries out the maloperation after the password, improved production test efficiency and equipment.
Drawings
FIG. 1 is a working schematic diagram of the present invention;
fig. 2 is a circuit diagram of the USB HOST circuit of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
Referring to fig. 1-2, the present invention provides a technical solution: a universal measuring instrument with a fingerprint identification function comprises a universal measuring instrument host and a USB fingerprint identification module. The measuring instrument HOST comprises a CPU and a USB HOST circuit. The general measurement system HOST comprises a CPU, a USB HOST circuit and a USB socket (fingerprint identification module socket) J1; the USB fingerprint identification module is connected with a CPU in the system through a USB socket J1 and a USB HOST circuit; the USB HOST circuit comprises a filter capacitor C1, resistors R1-R6, input power supplies of +5V and +3.3V, and a USB HOST power management chip SP 2526A.
A power management chip U1 in the USB HOST circuit is SP2526A, a 1-pin ENA end of U1 is connected with a USB power supply control pin of a CPU, an FLGA end of U1 is connected with a USB power supply current over-limit detection pin of the CPU, and the FLGA end is connected with a +3.3V input power supply through a resistor R2; the FLGB end, the ENB end and the OUTB end of the U1 are floating, the GND end is grounded, the IN end is connected with the 5V power supply input, a filter capacitor C1 is connected between the IN end and the GND end, and the OUTA end of the U1 is connected with a USB power supply state detection pin of the CPU through a resistor R1; the power output end of the USB socket J1 is connected with the OUTA end of the U1, the D + and D-ends of the J1 are respectively connected with a differential data transmission pin of the CPU through resistors R5 and R6, meanwhile, the D + and D-ends of the J1 are respectively grounded through resistors R4 and R3, and the ground end of the J1 is grounded.
In this embodiment, the resistance of the resistor R1 is 1k Ω, the resistance of the resistor R2 is 10k Ω, the resistance of R3 and R4 is 15k Ω, the resistance of the resistor R5R 6 is 33 Ω, and the capacitance of the capacitor C1 is 0.1 uF.
The resistor R5R 6 is a resistor placed in a high-speed communication line with the CPU, the resistance value cannot be too large, the resistor is used for impedance matching during high-speed data transmission, R2 is a pull-up resistor used for detecting an over-limit current signal line of the USB power supply, and C1 is used for filtering high-frequency noise of the power supply of +5V of U1 and providing stable power supply for U1.
When the USB fingerprinting module is plugged into J1, the USB power state detection goes high.
Claims (5)
1. The utility model provides a take general measuring instrument of fingerprint identification function, includes USB fingerprint identification module, its characterized in that: the USB fingerprint identification module is electrically connected with the measuring instrument HOST, the measuring instrument HOST comprises a CPU and a USB HOST circuit, the USB HOST circuit is electrically connected with the CPU, and the USB HOST circuit is electrically connected with the fingerprint identifier through a USB socket;
the USB HOST circuit comprises a USB power supply control pin of which an ENA end of a power supply management chip is connected with a CPU, an FLGA end of the power supply management chip is connected with a USB power supply current over-limit detection pin of the CPU, and the FLGA end is connected with a first input power supply through a resistor R2; the FLGB end, the ENB end and the OUTB end of the power management chip are floating, the GND end of the power management chip is grounded, the IN end of the power management chip is connected with the input power supply II, a filter capacitor is connected between the IN end and the GND end of the power management chip, and the OUTA end of the power management chip is connected with a USB power state detection pin of the CPU through a resistor R1; the power output end of the USB socket is connected with the OUTA end of the power management chip, the D + end and the D-end of the USB socket are respectively connected with a differential data transmission pin of the CPU through resistors R5 and R6, meanwhile, the D + end and the D-end of the USB socket are respectively grounded through resistors R4 and R3, and the ground end of the USB socket is grounded.
2. The universal measuring instrument with the fingerprint identification function according to claim 1, characterized in that: the resistance value of the resistor R1 is 1k omega, the resistance value of the resistor R2 is 10k omega, the resistance values of R3 and R4 are 15k omega, the resistance value of the resistor R5R 6 is 33 omega, and the capacitance value of the capacitor C1 is 0.1 uF.
3. The universal measuring instrument with the fingerprint identification function according to claim 1, characterized in that: and the first input power supply is a +3.3V input power supply.
4. The universal measuring instrument with the fingerprint identification function according to claim 1, characterized in that: and the second input power supply is a +5V input power supply.
5. The universal measuring instrument with the fingerprint identification function according to claim 1, characterized in that: the power management chip is SP 2526A.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922030352 | 2019-11-22 | ||
| CN2019220303522 | 2019-11-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213120623U true CN213120623U (en) | 2021-05-04 |
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ID=75681840
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021552039.1U Active CN213120623U (en) | 2019-11-22 | 2020-07-30 | Take fingerprint identification function's general measuring instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213120623U (en) |
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2020
- 2020-07-30 CN CN202021552039.1U patent/CN213120623U/en active Active
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