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| 型號(hào)： | UPD72852AGB-8EU |
| 廠商： | NEC Corp. |
| 英文描述： | IEEE1394a-2000 COMPLIANT 400 Mbps TWO-PORT PHY LSI |
| 中文描述： | 1個(gè)IEEE1394a 2000年的要求400 Mbps的雙端口PHY的大規(guī)模集成電路 |
| 文件頁數(shù)： | 36/48頁 |
| 文件大?。?/td> | 373K |
| 代理商： | UPD72852AGB-8EU |
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Data Sheet S16725EJ2V0DS
36
μ
PD72852A
5.4.1 Ping Packet
When the
μ
PD72852A receives the Ping packet, it will transmit the Self_ID packet within the RESPONSE_TIME.
Figure 5-4. Ping Packet Format
00
phy_ID
00
type (0)
00
0000
0000
0000
0000
Logical Inverse of the first quadlet
Table 5-4. Ping Packet
Field
Description
phy_ID
Physical ID of the destination node of the Ping packet
type
Indicates that there is a Ping packet with a value of 0
5.4.2 Remote Access Packet
The Remote access packet reads information in the PHY register of another node. The PHY specified by the
Remote access packet transmits the value in the register using the Remote Reply packet.
Figure 5-5. Remote Access Packet Format
00
phy_ID
00
type
page
port
reg
reserved
Logical Inverse of the first quadlet
Table 5-5. Remote Access Packet
Field
Description
phy_ID
Physical ID of the destination node of the Remote access packet
type
1 = read register (base register), 5 = read register (page register)
page
Specifies the page of the PHY register
port
Specifies the register of each port in the PHY register
reg
Specifies the address when reading the base register.
In case of the Page and port registers, specifies the address with 1000+reg.
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