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Texas Instruments TSB12LV26 manual Node Identification Register, Node identification, Cps

Models: TSB12LV26

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4.29 Node Identification Register

The node identification register contains the address of the node on which the OHCI-Lynx chip resides, and indicates the valid node number status. The 16-bit combination of the busNumber field (bits 15±6) and the NodeNumber field (bits 5±0) is referred to as the node ID. See Table 4±20 for a complete description of the register contents.

Bit

31

30

29

28

27

26

25

 

24

23

 

22

21

20

19

18

17

16

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Name

 

 

 

 

 

 

 

Node identification

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Type

RU

RU

R

R

RU

R

R

 

R

R

R

R

R

R

R

R

R

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Default

0

0

0

0

0

0

0

0

0

 

0

0

0

0

0

0

0

Bit

15

14

13

12

11

10

9

8

7

 

6

5

4

 

3

2

1

0

Name

 

 

 

 

 

 

 

 

 

 

 

Node identification

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Type

RWU

 

RWU

RWU

 

RWU

RWU

RWU

RWU

 

RWU

RWU

 

RWU

RU

RU

 

RU

RU

RU

RU

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Default

1

 

1

1

 

1

 

1

1

1

 

1

1

 

1

X

X

 

X

X

X

X

 

Register:

Node identification

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Type:

Read/Write/Update, Read/Update, Read-only

 

 

 

 

 

 

 

 

 

Offset:

E8h

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Default:

0000 FFXXh

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Table 4±20. Node Identification Register Description

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BIT

FIELD NAME

 

TYPE

 

 

 

 

 

 

DESCRIPTION

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

31

iDValid

 

RU

This bit indicates whether or not the TSB12LV26 has a valid node number. It is cleared when a 1394 bus

 

reset is detected and set when the TSB12LV26 receives a new node number from the PHY.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

30

 

root

 

RU

This bit is set during the bus reset process if the attached PHY is root.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

29±28

RSVD

 

 

R

Reserved. Bits 29±28 return 0s when read.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

27

 

CPS

 

RU

Set if the PHY is reporting that cable power status is OK.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

26±16

RSVD

 

 

R

Reserved. Bits 26±16 return 0s when read.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

15±6

BusNumber

 

RWU

This number is used to identify the specific 1394 bus the TSB12LV26 belongs to when multiple

 

1394-compatible buses are connected via a bridge.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

This number is the physical node number established by the PHY during self-ID. It is automatically set

5±0

NodeNumber

 

RU

to the value received from the PHY after the self-ID phase. If the PHY sets the NodeNumber to 63, then

 

software should not set the run bit (bit 15) of the asynchronous context control register (see Section

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4.37) for either of the AT DMA contexts.

 

 

 

 

 

 

 

 

4±25

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Texas Instruments TSB12LV26 manual Node Identification Register, Node identification, Cps
Page 62 Page 64

TSB12LV26 specifications

The Texas Instruments TSB12LV26 is a high-performance, low-voltage transceiver designed for Serial Bus applications. It is widely recognized for its robust features and versatility, making it a popular choice among engineers and designers in various industries. One of the primary features of the TSB12LV26 is its support for high-speed data transmission, enabling it to operate at speeds up to 400 Mbps. This capability is essential for applications that demand rapid data transfer, such as in multimedia and communication systems.

The TSB12LV26 is part of the IEEE 1394 standard, also known as FireWire, which is widely used for connecting devices like digital cameras, external hard drives, and printers. The chip operates within a voltage range of 2.7V to 3.6V, making it suitable for low-power applications where energy efficiency is critical. The integration of advanced Low-Voltage Differential Signaling (LVDS) technology within the TSB12LV26 enhances signal integrity and reduces electromagnetic interference, resulting in more reliable performance over longer distances.

In terms of its physical characteristics, the TSB12LV26 is available in a compact 48-pin HTQFP package, which is beneficial for space-constrained designs. The device features a comprehensive set of input and output pins, allowing for flexible connectivity options. Additionally, the TSB12LV26 includes advanced power management features, including low-power modes that help extend battery life in portable devices.

Another significant advantage of the TSB12LV26 is its capability for peer-to-peer communication, enabling devices to connect and communicate directly without the need for a central controller. This functionality supports a wide range of device configurations and simplifies system architecture. Furthermore, the transceiver offers built-in support for asynchronous and isochronous data transfer, making it adaptable for various application requirements.

The TSB12LV26 also adheres to stringent EMI and ESD protection standards, ensuring reliable operation in challenging environments. With a rich feature set, excellent performance characteristics, and compliance with industry standards, the Texas Instruments TSB12LV26 remains an ideal choice for engineers looking to implement high-speed and reliable communication in their designs. Overall, it represents a significant advancement in the field of data transmission technology, making it a preferred component for numerous electronic applications.