CN209267549U - AD data-interface is mapped to the circuit module of microprocessor memory interface - Google Patents
AD data-interface is mapped to the circuit module of microprocessor memory interface Download PDFInfo
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- CN209267549U CN209267549U CN201822234102.6U CN201822234102U CN209267549U CN 209267549 U CN209267549 U CN 209267549U CN 201822234102 U CN201822234102 U CN 201822234102U CN 209267549 U CN209267549 U CN 209267549U
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- 238000005070 sampling Methods 0.000 description 2
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- 238000012546 transfer Methods 0.000 description 2
- 241001269238 Data Species 0.000 description 1
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Abstract
A kind of circuit module that AD data-interface is mapped to microprocessor memory interface, pin DB0~DB15 of analog-digital converter chip AD7606 are connected with pin FMC_D0~FMC_D15 of processor chips STM32F429 respectively；A pin in pin FMC_A0~FMC_A13 of the pin CS and processor chips STM32F429 of analog-digital converter chip AD7606 connects；The pin FMC_NOE of the pin RD and processor chips STM32F429 of analog-digital converter chip AD7606 are connected；The pin of the pin CS and processor chips STM32F429 of analog-digital converter chip AD7606.The circuit module can the data of analog-digital converter chip AD7606 in time, efficiently, reliable transmission is to the design difficulty that in processor chips STM32F429, can help to reduce circuit internal processes.
Description
Technical field
The utility model relates to analog-digital converter data-interfaces, and in particular to a kind of that AD data-interface is mapped to micro process
The circuit module of device memory interface belongs to control circuit technical field.
Background technique
In power circuit measurement and protection system, need to a large amount of electric currents of multiphase transmission and distribution networks and voltage channel into
Row synchronized sampling.Analog-digital converter AD7606 multichannel data acquisition system (DAS) integrates 16 bipolarity synchronized sampling SAR
Over-voltage protecting function in ADC and piece, can greatly simplify signal conditioning circuit, and reduce number of devices, board area and measurement
The cost of protection board.In power circuit measurement and protection system, in the design of many measure and control devices, AD7606 conduct is mostly used
Analog-digital converter.
The data-interface of AD7606 has parallel and serial two kinds；It is set in traditional design in order to reduce number of wires and simplification
Meter generally uses serial interface mode.By the way of serial line interface, the measure and control device developed increasingly it has been difficult to meet to electricity
The high speed acquisition demand of stream, voltage data also restricts the technology development of measure and control device.
Using serial data interface mode, there are problems that following several respects and hidden danger:
1, the clock signal flank speed for being limited by serial data interface is 23.5MHz, and multiple AD7606 are shared at one
When managing device serial data interface, data throughout is easy to reach the upper limit；
2, when data throughout reaches the upper limit, processor needs equal pending datas to be transmitted, and wastes the processing of processor
Computing capability；
3, the serial transmission of higher clock frequency and data is easy by electromagnetic interference, and processor is easy to receive mistake
Data.
Therefore a kind of high speed, reliable data communication interface are needed, the connection of Lai Shixian AD7606 and processor meet
Measure and control device design requirement.
Summary of the invention
In view of the above-mentioned problems of the prior art, the utility model provides and a kind of AD data-interface is mapped to micro process
The circuit module of device memory interface, the circuit module can in time, efficiently, reliably pass the data of analog-digital converter chip AD7606
It is defeated by processor chips STM32F429, it can be in data transmission procedure, without excessive waiting time, processor chips
STM32F429 is the data that may be read into needs；Meanwhile can help to reduce the design difficulty of circuit internal processes, it is suitable for
Multiple programs design environment.
To achieve the goals above, the utility model, which provides, a kind of is mapped to microprocessor memory interface for AD data-interface
Circuit module, including processor chips STM32F429 and at least one analog-digital converter chip AD7606；
Pin DB0~DB15 of analog-digital converter chip AD7606 pipe with processor chips STM32F429 respectively
Foot FMC_D0~FMC_D15 connection；
Pin FMC_A0~FMC_ of the pin CS and processor chips STM32F429 of analog-digital converter chip AD7606
Pin connection in A13；
The pin FMC_NOE of the pin RD and processor chips STM32F429 of analog-digital converter chip AD7606 are connected；
The pin of the pin CS and processor chips STM32F429 of analog-digital converter chip AD7606.
The quantity of the analog-digital converter chip AD7606 is more than or equal to 1, and is less than or equal to 13.
In the utility model, the data-interface of analog-digital converter chip AD7606 is made to have mapped directly to processor chips
The memory interface of STM32F429 may be implemented the data of analog-digital converter chip AD7606 in time, at a high speed, reliably to transmit
Into processor chips STM32F429.In data transmission procedure, processor chips STM32F429 is not necessarily to the excessive waiting time,
It may be read into the data of needs；The circuit module can greatly reduce programming difficulty, be suitable for various programming rings
Border.
Detailed description of the invention
Fig. 1 is the circuit block diagram of the utility model.
Specific embodiment
The utility model is described in further detail below.
Analog-digital converter chip AD7606 has 16bit parallel bus transfers function, the number of processor chips STM32F429
8bit, 16bit, 32bit parallel bus transfers function are supported according to interface, in order to pass through both effective circuit design handles
Data-interface connect.
Converter chip AD7606 data-interface is made of following pin:
Pin DB [15:0]: parallel output data position, 16 pins have tri-state numeral output characteristic.
Pin RD: parallel data reads control input.
Pin CS: piece choosing, the effective logic of low level input enabled data frame transfer.In a parallel mode, if CS, RD are equal
In logic low, then output bus DB [15:0] can be enabled, make transformation result output on parallel data bus line.
The memory data interface of processor chips STM32F429 is made of following pin:
Pin FMC_D [15:0]: processor memory data-interface, 16bit width.
Pin FMC_A [13:0]: processor memory address interface.
Pin FMC_NOE: processor memory interface data reads logic output pin.
As shown in Figure 1, by the pin DB [15:0] and processor core of one or more pieces analog-digital converter chip AD7606
The FMC_D [15:0] of piece STM32F429 is connected, and realizes that the parallel bus of 16bit width is shared；By analog-digital converter chip
The pin FMC_NOE of the pin RD and processor chips STM32F429 of AD7606 are connected, and realize that read logical signal passes simultaneously
It send；The pin FMC_A0 of the pin CS and processor chips STM32F429 of No. 0 analog-digital converter chip AD7606 have been connected
Come, the pin FMC_A* of the pin CS and processor chips STM32F429 of * analog-digital converter chip AD7606 have been connected
Come, the numerical value of * is no more than 13, realizes that the chip selection signal of different analog-digital converter chip AD7606 is different.
Above-mentioned connection type is attached according to the memory interface logical requirements of processor chips STM32F429,
Meet the logical requirements of analog-digital converter chip AD7606 parallel data transmission mode again simultaneously.The connection type turns modulus
The data-interface of parallel operation chip AD7606 maps directly to the memory interface of processor chips STM32F429, and different moduluses turns
Its memory address of the data-interface of parallel operation chip AD7606 is different.
In this way, in processor program, it, can when being read out to the data of No. 0 analog-digital converter chip AD7606
Directly to carry out immediate data read operation to the corresponding memory address of analog-digital converter chip AD7606.
To memory interface carry out data read operation, almost without waiting for, it is only necessary to 2 processor clock cycles can be complete
At the transmission of data.
Claims (2)
1. a kind of circuit module that AD data-interface is mapped to microprocessor memory interface, which is characterized in that including processor
Chip STM32F429 and at least one analog-digital converter chip AD7606,
Pin DB0~DB15 of analog-digital converter chip AD7606 pin with processor chips STM32F429 respectively
FMC_D0~FMC_D15 connection；
In pin FMC_A0~FMC_A13 of the pin CS and processor chips STM32F429 of analog-digital converter chip AD7606
A pin connection；
The pin FMC_NOE of the pin RD and processor chips STM32F429 of analog-digital converter chip AD7606 are connected；
The pin of the pin CS and processor chips STM32F429 of analog-digital converter chip AD7606.
2. a kind of circuit module that AD data-interface is mapped to microprocessor memory interface according to claim 1,
It is characterized in that, the quantity of the analog-digital converter chip AD7606 is more than or equal to 1, and is less than or equal to 13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822234102.6U CN209267549U (en) | 2018-12-28 | 2018-12-28 | AD data-interface is mapped to the circuit module of microprocessor memory interface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822234102.6U CN209267549U (en) | 2018-12-28 | 2018-12-28 | AD data-interface is mapped to the circuit module of microprocessor memory interface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209267549U true CN209267549U (en) | 2019-08-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822234102.6U Active CN209267549U (en) | 2018-12-28 | 2018-12-28 | AD data-interface is mapped to the circuit module of microprocessor memory interface |
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2018
- 2018-12-28 CN CN201822234102.6U patent/CN209267549U/en active Active
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| GR01 | Patent grant | ||
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Address after: 221000 Zhujiang Road North, Yinshan Road East, Tongshan District, Xuzhou City, Jiangsu Province Patentee after: Jiangsu Guangzhi Electric Co.,Ltd. Patentee after: XUZHOU HEWEI-XINDIAN ELECTRICITY CO.,LTD. Address before: 221000 Zhujiang Road North, Yinshan Road East, Tongshan District, Xuzhou City, Jiangsu Province Patentee before: XUZHOU RUNZE ELECTRICAL CO.,LTD. Patentee before: XUZHOU HEWEI-XINDIAN ELECTRICITY CO.,LTD. |
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| CP01 | Change in the name or title of a patent holder | ||
| CP03 | Change of name, title or address |
Address after: 221000 Zhujiang Road North, Yinshan Road East, Tongshan District, Xuzhou City, Jiangsu Province Patentee after: Jiangsu Guangshi Electric Co.,Ltd. Patentee after: XUZHOU HEWEI-XINDIAN ELECTRICITY CO.,LTD. Address before: 221000 Zhujiang Road North, Yinshan Road East, Tongshan District, Xuzhou City, Jiangsu Province Patentee before: Jiangsu Guangzhi Electric Co.,Ltd. Patentee before: XUZHOU HEWEI-XINDIAN ELECTRICITY CO.,LTD. |
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