TSB41AB1 datasheet(32/70 Pages) TI

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TSB41AB1

IEEE 1394a2000 ONEPORT CABLE

TRANSCEIVER/ARBITER

SLLS423I − JUNE 2000 − REVISED MARCH 2005

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

POST OFFICE BOX 1443

• HOUSTON, TEXAS 77251−1443

APPLICATION INFORMATION

designing with the PowerPad package (continued)

Other requirements for thermal lands and thermal vias are detailed in the PowerPAD Thermally Enhanced

Package technical brief, TI literature number SLMA002, available via the TI Web pages beginning at URL

http://www.ti.com.

Figure 17. Example of a Thermal Land for the TSB41AB1PAP PHY

For the TSB41AB1, this thermal land should be grounded to the low-impedance ground plane of the device.

This improves not only thermal performance but also the electrical grounding of the device. It is also

recommended that the device ground terminal landing pads be connected directly to the grounded thermal land.

The land size should be as large as possible without shorting device signal terminals. The thermal land may

be soldered to the exposed PowerPAD using standard reflow soldering techniques.

While the thermal land may be electrically floated and configured to remove heat to an external heat sink, it is

recommended that the thermal land be connected to the low-impedance ground plane for the device. More

information may be obtained from the TI application report Recommendations for PHY Layout, TI literature

number SLLA020.

internal register configuration

There are 16 accessible internal registers in the TSB41AB1. The configuration of the registers at addresses 0h

through 7h (the base registers) is fixed, while the configuration of the registers at addresses 8h through Fh (the

paged registers) is dependent upon which one of eight pages, numbered 0 through 7, is currently selected. The

selected page is set in base register 7.

The configuration of the base registers is shown in Table 1, and corresponding field descriptions are given in

Table 2. The base register field definitions are unaffected by the selected page number.

A reserved register or register field (marked as Reserved or Rsvd in register configuration tables) is read as 0,

but is subject to future usage. All registers in pages 2 through 6 are reserved.

Table 1. Base Register Configuration

ADDRESS

BIT POSITION

0000

Physical ID

CPS

0001

RHB

IBR

Gap_Count

0010

Extended (111b)

Num_Ports (00001b)

0011

PHY_Speed (010b)

Rsvd

Delay (0000b)

0100

LCtrl

Jitter (000b)

Pwr_Class

0101

RPIE

ISBR

CTOI

CPSI

STOI

PEI

EAA

EMC

0110

Reserved

0111

Page_Select

Rsvd

Port_Select

TSB41AB1 Datasheet(PDF) 32 Page - Texas Instruments

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