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參數資料
| 型號： | TSB12LV01APZ |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | High-Speed Serial-Bus Link-Layer Controller |
| 中文描述： | 高速串行總線鏈路層控制器 |
| 文件頁數： | 47/71頁 |
| 文件大小： | 267K |
| 代理商： | TSB12LV01APZ |
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4–9
4.6
The transmit format of the link-on packet is shown in 9. The link-on packet contains three quadlets, which
are loaded in the ATF. The first quadlet is the tCode for an unformatted packet. This is written into ATF_First
at address 80h and has a value of 0000_00E0h. The second quadlet consists of actual data. This is written
into the ATF_Continue at address 84h and has a value of the first quadlet of the link-on packet. The third
quadlet is almost the inverse of the second quadlet. The first 16 bits of the third quadlet are the inverse of
the first 16 bits of the second quadlet. The final 16 bits of the third quadlet are all ones (1). This is written
into the ATF_Continue & Update at address 8Ch and has a value of the second quadlet of the link-on packet.
Link-On Transmit
There is a possibility of a false header error on receipt of a link-on packet. If the first 16 bits of a link-on packet
(see Figure 4–8) happen to match the destination identifier of a node (bus number and node number), the
TSB12LV01A on that node issues a header error since the node misinterprets the link-on packet as a data
packet addressed to the node. The suggested solution to this potential problem is to assign bus numbers
that all have the most significant (MS) bit set to 1. Since the all-ones case is reserved for addressing the
local bus, this leaves only 511 available unique bus identifiers. This is an artifact of the IEEE 1394-1995
standard.
0
1 2
3
4
5 6
7
8
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
logical inverse of first 16 bits of first quadlet
PHY_ID
0
1
1
1
1
0
0
0
0
0
0
0
0
0 0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1 1
1
1
1
0
0
0
0 0
0
0
0
1
1
1
0
0
0
0
0
0
0
0
0 0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0 0
0
0
0
Figure 4–9. Link-On Format
Table 4–9. Link-On Functions
FIELD NAME
DESCRIPTION
01
This field is the link-on packet identifier.
PHY_ID
This field is the physical_ID of the node this packet is addressed to.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TSB12LV01B | 制造商:TI 制造商全稱:Texas Instruments 功能描述:IEEE 1394-1995 HIGH SPEED SERIAL BUS LINK LAYER CONTROLLER |
| TSB12LV01B-EP | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Military Enhanced Plastic High Performance 1394 3.3V Link Layer for Telecom. Embedded & Indust. App. |
| TSB12LV01BIPZT | 功能描述:1394 接口集成電路 High Perf 1394 3.3V Link Layer RoHS:否 制造商:Texas Instruments 類型:Link Layer Controller 工作電源電壓: 封裝 / 箱體:LQFP 封裝:Tray |
| TSB12LV01BIPZTEP | 功能描述:1394 接口集成電路 Mil Enh Hi Perf 1394 3.3V Link Layer RoHS:否 制造商:Texas Instruments 類型:Link Layer Controller 工作電源電壓: 封裝 / 箱體:LQFP 封裝:Tray |
| TSB12LV01BPZ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:BUS CONTROLLER |
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