DP83867CS datasheet(30/129 Pages) TI2

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Instruction

Example: Set reg 0x0170 = 0C50

4. Write the content of the desired extended register set register to

Write register 0x0E to value 0x0C50

Subsequent writes to register ADDAR (step 4) continue to rewrite the register selected by the value in the

address register.

Note

Steps (1) and (2) can be skipped if the address register was previously configured.

7.4.2.1.4 Read (No Post Increment) Operation

To read a register in the extended register set:

Instruction

Example: Read 0x0170

1. Write the value 0x001F (address function field = 00, DEVAD =

31) to register REGCR.

Write register 0x0D to value 0x001F

2. Write the desired register address to register ADDAR.

Write register 0x0E to value 0x0170

3. Write the value 0x401F (data, no post increment function field =

01, DEVAD = 31) to register REGCR.

Write register 0x0D to value 0x401F

4. Read the content of the desired extended register set register to

Read register 0x0E

Subsequent reads from register ADDAR (step 4) continue reading the register selected by the value in the

address register.

Note

Steps (1) and (2) can be skipped if the address register was previously configured.

7.4.2.1.5 Write (Post Increment) Operation

To write a register in the extended register set and automatically increment the address register to the next

higher value following the write operation:

Instruction

Example: Set reg 0x0170 = 0C50 & reg 0x0171 = 0x0011

1. Write the value 0x001F (address function field = 00, DEVAD = 31)

to register REGCR.

Write register 0x0D to value 0x001F

2. Write the register address from register ADDAR.

Write register 0x0E to value 0x0170

3. Write the value 0x801F (data, post increment on reads and writes

function field = 10, DEVAD = 31) or the value 0xC01F (data, post

increment on writes function field = 11. DEVAD = 31) to register

REGCR.

Write register 0x0D to value 0x401F

4. Write the content of the desired extended register set register to

Write register 0x0E to value 0x0C50

5. Subsequent writes to register ADDAR (step 4) writes the next

higher addressed data register selected by the value of the address

Write register 0x0E to value 0x0011

Step 4 Writes register 0x0170 to 0x0C50 and because post increment is enabled, Step 5 writes register 0x0171

to 0x0011.

7.4.2.1.6 Read (Post Increment) Operation

To read a register in the extended register set and automatically increment the address register to the next

higher value following the read operation:

DP83867CS, DP83867IS, DP83867E

SNLS504F – OCTOBER 2015 – REVISED JANUARY 2025

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