CN107704405A - A kind of identical I2C address devices of multichannel share the device of an I2C main frame - Google Patents
A kind of identical I2C address devices of multichannel share the device of an I2C main frame Download PDFInfo
- Publication number
- CN107704405A CN107704405A CN201710828208.6A CN201710828208A CN107704405A CN 107704405 A CN107704405 A CN 107704405A CN 201710828208 A CN201710828208 A CN 201710828208A CN 107704405 A CN107704405 A CN 107704405A
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- pin
- multiplexer
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- pull
- resistor
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- 238000000034 method Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012536 packaging technology Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/382—Information transfer, e.g. on bus using universal interface adapter
- G06F13/387—Information transfer, e.g. on bus using universal interface adapter for adaptation of different data processing systems to different peripheral devices, e.g. protocol converters for incompatible systems, open system
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F2213/0016—Inter-integrated circuit (I2C)
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Coupling Device And Connection With Printed Circuit (AREA)
- Structure Of Telephone Exchanges (AREA)
Abstract
The present invention discloses the device that a kind of identical I2C address devices of multichannel share an I2C main frame, including：Mainboard, at least two identical backboards, at least two connectors；Connector quantity is identical with backboard quantity；BMC chip and multiplexer are provided with mainboard；The input of multiplexer is connected with BMC chip, and the output end of multiplexer connects each connector, and each connector connects a backboard；GPIO configuration informations are provided with the FW of BMC chip.The present apparatus reduces the design difficulty of backboard, improves producing line production and assembly technique, improves production efficiency.
Description
Technical field
The present invention relates to I2C apparatus fields, and in particular to a kind of identical I2C address devices of multichannel share an I2C main frame
Device.
Background technology
In the complete machine of generic server, there is the configuration that many one piece of mainboard collocation identical or different backboards of polylith use,
The temperature of backboard and the information of hard disk send the BMC of mainboard to by I2C agreements.In backboard, typically have two in I2C buses
Individual equipment, one is the thermal sensor for recording backboard temperature information, and another is recording disk relevant information
CPLD.The two equipment are in same I2C buses, and their I2C addresses are all different.If in a complete machine
In used more than two pieces identical backboards, and mainboard end only provides an I2C main frame with several pieces of backboards while linked up, will
Cause there are several identical I2C equipment to occur in an I2C bus, can so influence the proper communication of I2C buses.
Current way be to the several different I2C addresses of each I2C device configurations on backboard, and with jump cap come pair
I2C addresses switch over, so at the same time using the backboard of two or the above when, be unlikely to go out in same I2C buses
The I2C equipment of existing identical address.Although the equipment for occurring identical I2C addresses in same I2C buses is so avoided, together
When also bring inconvenience to engineer operation, be required for manually adjusting the configuration of jump cap every time to adjust I2C addresses, also easily occur
Mistake, reduce assembling production efficiency.
The content of the invention
To solve the above problems, the present invention provides the dress that a kind of identical I2C address devices of multichannel share an I2C main frame
Put, realize the equipment proper communication on the I2C main frames and multiple I2C links of BMC chip.
The technical scheme is that：A kind of identical I2C address devices of multichannel share the device of an I2C main frame, including：
Mainboard, at least two identical backboards, at least two connectors；Connector quantity is identical with backboard quantity；
BMC chip and multiplexer are provided with mainboard；The input of multiplexer is connected with BMC chip, multichannel
The output end of multiplexer connects each connector, and each connector connects a backboard；
GPIO configuration informations are provided with the FW of BMC chip.
Further, multiplexer is SN74CB3Q3253 chips.
Further, 7 pin of multiplexer, 9 pin, 14 pin, 2 pin, 1 pin, 15 pin are connected with BMC chip respectively；Multichannel
The 16 pin connection pull-up power supply of multiplexer, 16 pin of multiplexer also pass through the first capacity earth；8 pin of multiplexer connect
Ground.
Further, in addition to pull-up resistor R1, pull-up resistor R2, pull-up resistor R3, pull-up resistor R4, pull-up resistor R5
With pull-up resistor R6；
6 pin of multiplexer, 5 pin, 4 pin, 10 pin, 11 pin, 12 pin respectively through pull-up resistor R1, pull-up resistor R2, on
Pull-up resistor R3, pull-up resistor R4, pull-up resistor R5, pull-up resistor R6 are connected to pull-up power supply；3 pin, 13 pin of multiplexer
Vacantly.
Further, connector includes the first connector, the second connector and the 3rd connector；
2 pin, 3 pin of first connector connect 10 pin of multiplexer, 6 pin respectively；The 1 pin ground connection of first connector；
2 pin, 3 pin of second connector connect 11 pin of multiplexer, 5 pin respectively；The 1 pin ground connection of second connector；
2 pin, 3 pin of 3rd connector connect 12 pin of multiplexer, 4 pin respectively；The 1 pin ground connection of 3rd connector.
The identical I2C address devices of multichannel provided by the invention share the device of an I2C main frame, and multichannel is set on mainboard
Multiplexers, GPIO configuration informations are set on mainboard in the FW of BMC chip, realize that BMC chip is controlled to multiplexer,
The equipment proper communication allowed on the I2C main frames and multiple I2C links of BMC chip, the design difficulty of backboard is reduced, improve producing line life
Packaging technology is produced, improves production efficiency.
Brief description of the drawings
Fig. 1 is specific embodiment of the invention circuit diagram.
In figure, U1- multiplexers, U2-BMC chips, the connectors of J1- first, the connectors of J2- second, the connections of J3- the 3rd
Device, R1, R2, R3, R4, R5, R6- pull-up resistor.
Embodiment
Below in conjunction with the accompanying drawings and the present invention will be described in detail by specific embodiment, and following examples are to the present invention
Explanation, and the invention is not limited in implementation below.
The identical I2C address devices of multichannel that the present embodiment provides share the device of an I2C main frame, including：Mainboard, at least
Two identical backboards, at least two connectors.Connector is corresponding to backboard, and its quantity is identical with the quantity of backboard.
As shown in figure 1, be provided with BMC chip U2 and multiplexer U1 on mainboard, multiplexer U1 input with
BMC chip U2 connections, multiplexer U1 output end connect each connector, and each connector connects a backboard.
To realize controls of the BMC chip U2 to multiplexer U1, GPIO is provided with BMC chip U2 FW and matches somebody with somebody confidence
Breath.
In the present embodiment, SN74CB3Q3253 chips can be used in multiplexer U1.Multiplexer U1 7 pin, 9
Pin, 14 pin, 2 pin, 1 pin, 15 pin are connected with BMC chip U2 respectively；Multiplexer U1 16 pin connection pull-up power supply, multichannel are multiple
Also it is grounded with device U1 16 pin by the first electric capacity C1；Multiplexer U1 8 pin ground connection.
BMC chip U2 can pass through three GPIO signals I2C_MUX1_EN, I2C_MUX_SEL0, I2C_MUX_SEL1 controls
Multiplexer U1 S0, S1,The level height of these three pins, a pair of the I2C main frames that can be allowed on BMC chip U2 divide
Not with four I2C link communications, and in point at the same time, only an I2C link can be with the I2C master on BMC chip U2
Machine communicates, so the device address on this four I2C links can be with identical.
In the present embodiment, three connectors can be set：First connector J1, the second connector J2 and the 3rd connector J3,
Three connectors connect a backboard respectively.Be connected to realize with three backboards, setting pull-up resistor R1, pull-up resistor R2, on
Pull-up resistor R3, pull-up resistor R4, pull-up resistor R5 and pull-up resistor R6.Multiplexer U1 6 pin, 5 pin, 4 pin, 10 pin, 11
Pin, 12 pin are respectively through pull-up resistor R1, pull-up resistor R2, pull-up resistor R3, pull-up resistor R4, pull-up resistor R5, pull-up resistor
R6 is connected to pull-up power supply；Multiplexer U1 3 pin, 13 pin are hanging.First connector J1 2 pin, 3 pin connect multichannel respectively
Multiplexer U1 10 pin, 6 pin；First connector J1 1 pin ground connection；Second connector J2 2 pin, 3 pin connect multichannel and answered respectively
With device U1 11 pin, 5 pin；Second connector J2 1 pin ground connection；3rd connector J3 2 pin, 3 pin connect multiplexing respectively
Device U1 12 pin, 4 pin；3rd connector J3 1 pin ground connection.
User also can be as needed, and two or four backboard is connected using two or four connector.Using the present apparatus,
In back plate design, same I2C equipment need not configure several I2C addresses by jump cap again, allow the design of backboard also to become
Simply, also eliminate producing line needs to change the operation of jump cap in assembling.
Disclosed above is only the preferred embodiment of the present invention, but the present invention is not limited to this, any this area
What technical staff can think does not have creative change, and some improvement made without departing from the principles of the present invention and
Retouching, should all be within the scope of the present invention.
Claims (5)
1. a kind of identical I2C address devices of multichannel share the device of an I2C main frame, it is characterised in that including：Mainboard, at least
Two identical backboards, at least two connectors；
Connector quantity is identical with backboard quantity；
BMC chip and multiplexer are provided with mainboard；The input of multiplexer is connected with BMC chip, multiplexing
The output end of device connects each connector, and each connector connects a backboard；
GPIO configuration informations are provided with the FW of BMC chip.
2. the identical I2C address devices of multichannel according to claim 1 share the device of an I2C main frame, it is characterised in that
Multiplexer is SN74CB3Q3253 chips.
3. the identical I2C address devices of multichannel according to claim 2 share the device of an I2C main frame, it is characterised in that
7 pin, 9 pin, 14 pin, 2 pin, 1 pin, 15 pin of multiplexer are connected with BMC chip respectively；In the 16 pin connection of multiplexer
Power supply is drawn, 16 pin of multiplexer also pass through the first capacity earth；The 8 pin ground connection of multiplexer.
4. the identical I2C address devices of multichannel according to claim 3 share the device of an I2C main frame, it is characterised in that
Also include pull-up resistor R1, pull-up resistor R2, pull-up resistor R3, pull-up resistor R4, pull-up resistor R5 and pull-up resistor R6；
6 pin, 5 pin, 4 pin, 10 pin, 11 pin, 12 pin of multiplexer are electric through pull-up resistor R1, pull-up resistor R2, pull-up respectively
Resistance R3, pull-up resistor R4, pull-up resistor R5, pull-up resistor R6 are connected to pull-up power supply；3 pin, 13 pin of multiplexer are hanging.
5. the identical I2C address devices of multichannel according to claim 4 share the device of an I2C main frame, it is characterised in that
Connector includes the first connector, the second connector and the 3rd connector；
2 pin, 3 pin of first connector connect 10 pin of multiplexer, 6 pin respectively；
The 1 pin ground connection of first connector；
2 pin, 3 pin of second connector connect 11 pin of multiplexer, 5 pin respectively；
The 1 pin ground connection of second connector；
2 pin, 3 pin of 3rd connector connect 12 pin of multiplexer, 4 pin respectively；
The 1 pin ground connection of 3rd connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710828208.6A CN107704405B (en) | 2017-09-14 | 2017-09-14 | Device for sharing one I2C host by multiple paths of same I2C address equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710828208.6A CN107704405B (en) | 2017-09-14 | 2017-09-14 | Device for sharing one I2C host by multiple paths of same I2C address equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107704405A true CN107704405A (en) | 2018-02-16 |
| CN107704405B CN107704405B (en) | 2020-07-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710828208.6A Active CN107704405B (en) | 2017-09-14 | 2017-09-14 | Device for sharing one I2C host by multiple paths of same I2C address equipment |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201229748A (en) * | 2011-01-10 | 2012-07-16 | Hon Hai Prec Ind Co Ltd | Server and method for controlling opening of channels |
| CN104123260A (en) * | 2013-04-29 | 2014-10-29 | 鸿富锦精密工业（深圳）有限公司 | BMC read-only memory (ROM) control system and method |
| CN104298583A (en) * | 2013-07-15 | 2015-01-21 | 鸿富锦精密工业（深圳）有限公司 | Mainboard management system and method based on baseboard management controller |
-
2017
- 2017-09-14 CN CN201710828208.6A patent/CN107704405B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201229748A (en) * | 2011-01-10 | 2012-07-16 | Hon Hai Prec Ind Co Ltd | Server and method for controlling opening of channels |
| CN104123260A (en) * | 2013-04-29 | 2014-10-29 | 鸿富锦精密工业（深圳）有限公司 | BMC read-only memory (ROM) control system and method |
| CN104298583A (en) * | 2013-07-15 | 2015-01-21 | 鸿富锦精密工业（深圳）有限公司 | Mainboard management system and method based on baseboard management controller |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107704405B (en) | 2020-07-21 |
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Effective date of registration: 20200618 Address after: 215100 No. 1 Guanpu Road, Guoxiang Street, Wuzhong Economic Development Zone, Suzhou City, Jiangsu Province Applicant after: SUZHOU LANGCHAO INTELLIGENT TECHNOLOGY Co.,Ltd. Address before: 450000 Henan province Zheng Dong New District of Zhengzhou City Xinyi Road No. 278 16 floor room 1601 Applicant before: ZHENGZHOU YUNHAI INFORMATION TECHNOLOGY Co.,Ltd. |
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