TLK6002 datasheet(42/98 Pages) TI2

42 / 98 page

32 "1's"

PA[4:0]

16'h8000

Idle

Start

Write

Code

PHY

Addr

Turn

Around

Data

REG

Addr

5'h1E

Preamble

MDC

MDIO

32 "1's"

PA[4:0]

DATA

Idle

Start

Write

Code

PHY

Addr

Turn

Around

Data

REG

Addr

5'h1F

Preamble

MDC

MDIO

32 "1's"

PA[4:0]

16'h8000

Idle

Start

Write

Code

PHY

Addr

Turn

Around

Data

REG

Addr

5'h1E

Preamble

MDC

MDIO

TLK6002

SLLSE34A – MAY 2010 – REVISED AUGUST 2010

www.ti.com

The IEEE 802.3 Clause 22 specification defines many of the registers, and additional registers have been

implemented for expanded functionality.

Clause 22 Indirect Addressing:

The TLK6002 Register space is divided into two register groups. One register group can be addressed

directly through Clause 22, and one register group can be addressed indirectly through Clause 22. The

method is implemented so that this extended register space can be accessed through clause 22. To

access this register space (16’h8000 onwards), an address control register (Reg 30, 5’h1E) should be

written with the register address followed by a read/write transaction to address data register (Reg 31,

5’h1F) to access the contents of the address specified in address control register.

Figure 2-17 and Figure 2-18 illustrate an example write transaction to Register 16’h8000 using indirect

addressing in Clause 22.

Figure 2-17. CL22 – Indirect Address Method – Address Write

Figure 2-18. CL22 – Indirect Address Method – Data Write

Figure 2-19 and Figure 2-20 illustrate an example read transaction to read contents of Register 16’h8000

using indirect addressing in Clause 22.

Figure 2-19. CL22 – Indirect Address Method – Address Write

Description

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