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| ezlinx:isolated-spi [13 May 2012 13:56] – Approved Hein Marais | resources:eval:ezlinx:isolated-spi [23 Jul 2012 14:58] – Approved Hein Marais |
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| [[http://wiki.analog.com/ezlinx|ezLINX™ iCoupler® Isolated Interface Development Platform Homepage]] | [[resources/eval/ezlinx|ezLINX™ iCoupler® Isolated Interface Development Environment Homepage]] |
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| ====== ezLINX™ Isolated SPI Implementation====== | ====== ezLINX™ Isolated SPI Implementation====== |
| Two Isolated SPI ports are implemented using the [[http://www.analog.com/adum3401|ADuM3401]] and the [[http://www.analog.com/adum3402|ADuM3402]] //i//Coupler signal isolators and the [[http://www.analog.com/adum5000|ADuM5000]] //iso//Power Isolated DC to DC converter. The [[http://www.analog.com/adum3401|ADuM3401]] of the isolated SPI1 is connected to SPI0 of the ADSP-BF548. The [[http://www.analog.com/adum3402|ADuM3402]] is used for isolating the SPI slave select lines. Figure 1 below shows a circuit diagram of the implementation of Isolated SPI1 using the [[http://www.analog.com/adum3401|ADuM3401]], [[http://www.analog.com/adum3402|ADuM3402]], and [[http://www.analog.com/adum5000|ADuM5000]] on the //ez//LINX hardware. | Two Isolated SPI ports are implemented using the [[http://www.analog.com/adum3401|ADuM3401]] and the [[http://www.analog.com/adum3402|ADuM3402]] //i//Coupler signal isolators and the [[http://www.analog.com/adum5000|ADuM5000]] //iso//Power Isolated DC to DC converter. The [[http://www.analog.com/adum3401|ADuM3401]] of the isolated SPI1 is connected to SPI0 of the ADSP-BF548. The [[http://www.analog.com/adum3402|ADuM3402]] is used for isolating the SPI slave select lines. Figure 1 below shows a circuit diagram of the implementation of Isolated SPI1 using the [[http://www.analog.com/adum3401|ADuM3401]], [[http://www.analog.com/adum3402|ADuM3402]], and [[http://www.analog.com/adum5000|ADuM5000]] on the //ez//LINX hardware. |
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| | {{ :ezlinx:isolatedspi1.png?nolink&900 |Figure 1. Isolated SPI1 schematic}} |
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| {{ :ezlinx:spi1.jpg?nolink&800 |Figure 1. Isolated SPI1 schematic}} | To connect Isolated SPI1 as a master, connect jumpers JP5, JP7, JP9, JP11, JP13, JP15, JP21 and JP36 while leaving jumpers JP6, JP8, JP10, JP12, JP14, JP16, JP20 and JP37 open. To connect Isolated SPI1 as a slave, connect jumpers JP6, JP8, JP10, JP12, JP14, JP16, JP20 and JP37 while leaving jumpers JP5, JP7, JP9, JP11, JP13, JP15, JP21 and JP36 open. When connecting SPI1 as a slave, connecting JP20 enables the slave select and serial clock inputs on the [[http://www.analog.com/adum3402|ADuM3402]]. |
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| To connect Isolated SPI1 as a master, connect jumpers JP5, JP7, JP9, JP11, JP13 and JP15 while leaving jumpers JP6, JP8, JP10, JP12, JP14 and JP16 open. To connect Isolated SPI1 as a slave, connect jumpers JP6, JP8, JP10, JP12, JP14 and JP16 while leaving jumpers JP5, JP7, JP9, JP11, JP13 and JP15 open. When connecting SPI1 as a slave JP20 should also be connected, enabling the slave select and serial clock inputs on the [[http://www.analog.com/adum3402|ADuM3402]]. | |
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| These jumper settings are given in the table below: | These jumper settings are given in the table below: |
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| | ^ JP5 ^ JP6 ^ JP7 ^ JP8 ^ JP9 ^ JP10 ^ JP11 ^ JP12 ^ JP13 ^ JP14 ^ JP15 ^ JP16 ^ JP20 ^ JP21 ^ | | ^ JP5 ^ JP6 ^ JP7 ^ JP8 ^ JP9 ^ JP10 ^ JP11 ^ JP12 ^ JP13 ^ JP14 ^ JP15 ^ JP16 ^ JP20 ^ JP21 ^ JP36 ^ JP37 ^ |
| ^ SPI1 Master | Connect | Open | Connect | Open | Connect | Open | Connect | Open | Connect | Open | Connect | Open | Open | Connect / Floating | | ^ SPI1 Master | Connect | Open | Connect | Open | Connect | Open | Connect | Open | Connect | Open | Connect | Open | Open | Connect | Connect | Open | |
| ^ SPI1 Slave | Open | Connect | Open | Connect | Open | Connect | Open | Connect | Open | Connect | Open | Connect | Connect | Open | | ^ SPI1 Slave | Open | Connect | Open | Connect | Open | Connect | Open | Connect | Open | Connect | Open | Connect | Connect | Open | Open | Connect | |
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| The [[http://www.analog.com/adum3401|ADuM3401]] of the isolated SPI2 is connected to SPI2 of the ADSP-BF548. The [[http://www.analog.com/adum3402|ADuM3402]] is used for isolating the SPI slave select lines. Figure 2 below shows a circuit diagram of the implementation of Isolated SPI2 using the [[http://www.analog.com/adum3401|ADuM3401]], [[http://www.analog.com/adum3402|ADuM3402]] and [[http://www.analog.com/adum5000|ADuM5000]] on the //ez//LINX hardware. | The [[http://www.analog.com/adum3401|ADuM3401]] of the isolated SPI2 is connected to SPI2 of the ADSP-BF548. The [[http://www.analog.com/adum3402|ADuM3402]] is used for isolating the SPI slave select lines. Figure 2 below shows a circuit diagram of the implementation of Isolated SPI2 using the [[http://www.analog.com/adum3401|ADuM3401]], [[http://www.analog.com/adum3402|ADuM3402]] and [[http://www.analog.com/adum5000|ADuM5000]] on the //ez//LINX hardware. |
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| | {{ :ezlinx:isolatedspi2.png?nolink&900 |Figure 2. Isolated SPI2 schematic}} |
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| {{ :ezlinx:spi2.jpg?nolink&800 |Figure 2. Isolated SPI2 schematic}} | To connect Isolated SPI2 as a master, connect jumpers JP22, JP24, JP26, JP28, JP30, JP32, JP35 and JP38 while leaving jumpers JP23, JP25, JP27, JP29, JP31, JP33, JP34 and JP39 open. To connect Isolated SPI2 as a slave, connect jumpers JP23, JP25, JP27, JP29, JP31, JP33, JP34 and JP39 while leaving jumpers JP22, JP24, JP26, JP28, JP30, JP32, JP35 and JP38 open. When connecting SPI2 as a slave JP34 should also be connected, enabling the slave select and serial clock inputs on the [[http://www.analog.com/adum3402|ADuM3402]]. |
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| To connect Isolated SPI2 as a master, connect jumpers JP22, JP24, JP26, JP28, JP30 and JP32 while leaving jumpers JP23, JP25, JP27, JP29, JP31 and JP33 open. To connect Isolated SPI2 as a slave, connect jumpers JP23, JP25, JP27, JP29, JP31 and JP33 while leaving jumpers JP22, JP24, JP26, JP28, JP30 and JP32 open. When connecting SPI2 as a slave JP34 should also be connected, enabling the slave select and serial clock inputs on the [[http://www.analog.com/adum3402|ADuM3402]]. | |
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| These jumper settings are given in the table below: | These jumper settings are given in the table below: |
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| | ^ JP22 ^ JP23 ^ JP24 ^ JP25 ^ JP26 ^ JP27 ^ JP28 ^ JP29 ^ JP30 ^ JP31 ^ JP32 ^ JP33 ^ JP34 ^ JP35 ^ | | ^ JP22 ^ JP23 ^ JP24 ^ JP25 ^ JP26 ^ JP27 ^ JP28 ^ JP29 ^ JP30 ^ JP31 ^ JP32 ^ JP33 ^ JP34 ^ JP35 ^ JP38 ^ JP39 ^ |
| ^ SPI2 Master | Connect | Open | Connect | Open | Connect | Open | Connect | Open | Connect | Open | Connect | Open | Open | Connect / Floating | | ^ SPI2 Master | Connect | Open | Connect | Open | Connect | Open | Connect | Open | Connect | Open | Connect | Open | Open | Connect | Connect | Open | |
| ^ SPI2 Slave | Open | Connect | Open | Connect | Open | Connect | Open | Connect | Open | Connect | Open | Connect | Connect | Open | | ^ SPI2 Slave | Open | Connect | Open | Connect | Open | Connect | Open | Connect | Open | Connect | Open | Connect | Connect | Open | Open | Connect | |
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| VDD1 of the [[http://www.analog.com/adum3401|ADuM3401]], [[http://www.analog.com/adum3402|ADuM3402]] and VDD1 of the [[http://www.analog.com/adum5000|ADuM5000]] are powered by 3.3V. The [[http://www.analog.com/adum5000|ADuM5000]] will generate an isolated 3.3V and is used to supply power to VDD2 of the [[http://www.analog.com/adum3401|ADuM3401]] and [[http://www.analog.com/adum3402|ADuM3402]]. | VDD1 of the [[http://www.analog.com/adum3401|ADuM3401]], [[http://www.analog.com/adum3402|ADuM3402]] and VDD1 of the [[http://www.analog.com/adum5000|ADuM5000]] are powered by 3.3V. The [[http://www.analog.com/adum5000|ADuM5000]] will generate an isolated 3.3V and is used to supply power to VDD2 of the [[http://www.analog.com/adum3401|ADuM3401]] and [[http://www.analog.com/adum3402|ADuM3402]]. |
