參數(shù)資料
型號(hào)： TSB12C01APZ
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(yè)數(shù)： 38/59頁(yè)
文件大?。?/td> 275K
代理商： TSB12C01APZ
4–8
Table 4–9. Phy Configuration Functions
FIELD NAME
DESCRIPTION
00
This field is the phy configuration packet identifier.
root_ID
This field is the physical_ID of the node to have its force_root bit set (only meaningful when
R is set).
R
When R is set, the force-root bit of the node identified in root_ID is set and the force_root bit
of all other nodes are cleared. When R is cleared, root_ID is ignored.
T
When T is set, the PHY_CONFIGURATION.gap_count field of all the nodes is set to the value
in the gap_cnt field.
gap_cnt
This field contains the new value for PHY_CONFIGURATION.gap_count for all nodes. This
value goes into effect immediately upon receipt and remains valid after the next bus reset.
After the second reset, gap_cnt is set to 63h unless a new phy configuration packet is
received.
A phy configuration packet with R = 0, and T = 0 is reserved and is ignored when received.
4.7
The format of the link-on packet is shown in Figure 4–10. The link-on packet transmit contains two quadlets,
which are loaded into the ATF. The first quadlet is written to address 80h. The second quadlet is written to
address 8Ch. The 00E0h in the first quadlet tells the TSB12C01A that this is the link-on packet. The Eh is
then replaced with 0h before the packet is transmitted to the phy interface.
Link-On
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
root_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
Figure 4–10. Link-On Format
Table 4–10. Link-On Functions
FIELD NAME
DESCRIPTION
01
This field is the link-on packet identifier.
root_ID
This field is the physical_ID of the node to have its force_root bit set.
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