Datasheet

TLK110

SLLS901C –DECEMBER 2011–REVISED JUNE 2013

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8.2.1 Register Control Register (REGCR)

This register is the MDIO Manageable MMD access control. In general, register REGCR (4:0) is the

device address DEVAD that directs any accesses of the ADDAR (0x000E) register to the appropriate

MMD. REGCR also contains selection bits for auto increment of the data register. This register contains

the device address to be written to access the extended registers. Write 0x1F into bits 4:0 of this register.

REGCR also contains selection bits (15:14) for the address auto-increment mode of ADDAR.

Table 8-16. Register Control Register (REGCR), address 0x000D

BIT BIT NAME DEFAULT DESCRIPTION

15:14 Function 0, RW 00 = Address

01 = Data, no post increment

10 = Data, post increment on read and write

11 = Data, post increment on write only

13:5 RESERVED 0, RO RESERVED: Writes ignored, read as 0.

4:0 DEVAD 0, RW Device Address: In general, these bits [4:0] are the device address DEVAD that directs any

accesses of ADDAR register (0x000E) to the appropriate MMD. Specifically, the TLK110 uses the

vendor specific DEVAD [4:0] = “11111” for accesses. All accesses through registers REGCR and

ADDAR should use this DEVAD. Transactions with other DEVAD are ignored.

8.2.2 Address or Data Register (ADDAR)

This register is the address/data MMD register. ADDAR is used in conjunction with REGCR register

(0x000D) to provide the access by indirect read/write mechanism to the extended register set.

Table 8-17. Data Register (ADDAR), address 0x000E

BIT BIT NAME DEFAULT DESCRIPTION

15:0 Addr/data 0, RW If REGCR register 15:14 = 00, holds the MMD DEVAD's address register, otherwise holds the

MMD DEVAD's data register

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