ADIN2111CCPZ-R7 datasheet(47/125 Pages) AD

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Data Sheet

ADIN2111

SWITCH SPI

analog.com

Rev. 0 | 47 of 125

MDIO PHY Address Determination

The ADIN2111 allows access to the two PHY registers via an SPI to

MDIO master bridge.

Each of the two PHYs has a fixed MDIO PHY address, as follows:

►

MDIO PHY Address 1: PHY 1

►

MDIO PHY Address 2: PHY 2

Clause 45 MDIO Operation Examples

Example write to PHY 1 Register XYZ:

1. Write MDIOACC0 with MDIO_DATA = the address of Regis-

ter XYZ, MDIO_DEVAD = the device ID of Register XYZ,

MDIO_PRTAD = 0x1, MDIO_OP = 0x0(ADDR), MDIO_ST =

0x0, and TRDONE = 0x0.

2. Write MDIOACC1 with MDIO_DATA = the value to be written to

3. Optionally, poll MDIOACC0. TRDONE = 0x1 to determine that

the write address operation has completed.

4. Poll MDIOACC1. TRDONE = 0x1 to determine that the write

data operation completed.

Example read of PHY 1 Register XYZ:

1. Write MDIOACC0 with MDIO_DATA = the address of Register

XYZ, MDIO_OP = 0x0(ADDR), and TRDONE = 0x0.

2. Write MDIOACC1 with MDIO_OP = 0x3(RD) and TRDONE =

0x0.

3. Poll MDIOACC1. TRDONE = 0x1 to determine that the write

data operation completed. MDIOACC1. MDIO_DATA reflects

the content of MDIO Register XYZ.

Example write operation followed by a read to verify the write

operation:

1. Write MDIOACC0 with MDIO_DATA = the address of register

ABC and TRDONE = 0x0.

2. Write MDIOACC1 with MDIO_DATA = the value to be written to

3. Write MDIOACC2 MDIO_OP = 0x3(RD) and TRDONE = 0x0.

4. Poll MDIOACC2. TRDONE = 0x1 to verify that all operations

completed. MDIO_DATA reflects the content of register ABC.

Example of four consecutive writes. It is possible to write a com-

mand to all eight registers before checking any.

1. Write MDIOACC0 with MDIO_DATA = the address of Register

ABC and TRDONE = 0x0.

2. Write MDIOACC1 with the write data for register ABC,

MDIO_OP = 0x1, and TRDONE = 0x0.

3. Write MDIOACC2 with MDIO_DATA = the address of Register

DEF and TRDONE = 0x0.

4. Write MDIOACC3 with the write data for register DEF,

MDIO_OP = 0x1, and TRDONE = 0x0.

5. Write MDIOACC4 with MDIO_DATA = the address of Register

GHJ and TRDONE = 0x0.

6. Write MDIOACC5 with the write data for register GHJ,

MDIO_OP = 0x1, and TRDONE = 0x0.

7. Write MDIOACC6 with MDIO_DATA = the address of Register

XYZ and TRDONE = 0x0.

8. Write MDIOACC7 with the write data for Register XYZ,

MDIO_OP = 0x1, and TRDONE = 0x0.

9. Host polls MDIOACC7. TRDONE = 0x1 to verify that all write

data operations are complete.

Example burst read starting from Register XYZ:

1. Write MDIOACC0 with MDIO_DATA = the address of the Regis-

ter XYZ, MDIO_OP = 0x0(ADDR), and TRDONE = 0x0

2. Write MDIOACC1 with MDIO_OP = 0x2(INC_RD) and

TRDONE = 0x0.

3. Write MDIOACC2 with MDIO_OP = 0x2(INC_RD) and

TRDONE = 0x0.

4. Write MDIOACC3 with MDIO_OP = 0x2(INC_RD) and

TRDONE = 0x0.

5. Write MDIOACC4 with MDIO_OP = 0x2(INC_RD) and

TRDONE = 0x0.

6. Write MDIOACC5 with MDIO_OP = 0x2(INC_RD) and

TRDONE = 0x0.

7. Write MDIOACC6 with MDIO_OP = 0x2(INC_RD) and

TRDONE = 0x0.

8. Write MDIOACC7 with MDIO_OP = 0x2(INC_RD) and

TRDONE = 0x0.

9. Poll MDIOACC7. TRDONE = 1 to verify that all read data

operations are complete.

10. Read MDIOACC1. MDIO_DATA, reflects the content of Register

XYZ.

11. Read MDIOACC2. MDIO_DATA, reflects the content of Register

XYZ. ADDR + 1.

12. Read MDIOACC3. MDIO_DATA, reflects the content of Register

XYZ. ADDR + 2.

13. Read MDIOACC4. MDIO_DATA, reflects the content of Register

XYZ. ADDR + 3.

14. Read MDIOACC5. MDIO_DATA, reflects the content of Register

XYZ. ADDR + 4.

15. Read MDIOACC6. MDIO_DATA, reflects the content of Register

XYZ. ADDR + 5.

16. Read MDIOACC7. MDIO_DATA, reflects the content of Register

XYZ. ADDR + 6.

Clause 22 MDIO Operations Examples

Example of Clause 22 write of Register XYZ:

1. Write MDIOACC0 with MDIO_DATA = write data,

MDIO_DEV_AD = the address of the Register XYZ,

MDIO_PRTAD = 0x1, MDIO_OP = 0x1(WR), MDIO_ST =

0x1(Clause 22), and TRDONE = 0x0.

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