參數(shù)資料
型號： LXT9860AHC
英文描述： Controller Miscellaneous - Datasheet Reference
中文描述： 控制器雜項-數(shù)據(jù)表參考
文件頁數(shù)： 43/96頁
文件大小： 1309K
代理商： LXT9860AHC
LXT980/980A Dual-Speed, 5-Port Fast Ethernet Repeater
Datasheet
43
2.6.4
Interrupt Functions
The LXT980 provides a single open-collector pin for external interrupt signalling. Seven different
interrupt conditions may be reported. The Interrupt Status Register identifies the specific interrupt
condition (refer to
Table 66 on page 87
). The Interrupt Mask Register allows specific interrupts to
be masked. Interrupts may be cleared in two ways, depending on the status of bit 11 in the Repeater
Configuration Register (refer to
Table 71 on page 90
).
Figure 11. Serial Management Frame Format
Table 20. Serial Management Header Storage
MSB
LSB
Increasing
Address
Addr 11
Addr 10
Addr 9
Addr 8
Addr 7
Addr 6
Addr 5
Addr 4
Addr 3
Addr 2
Addr 1
Addr 0
Length 6
Length 5
Length 4
Length 3
Length 2
Length 1
Length 0
CMD 4
Cmd 3
Cmd 2
Cmd 1
Cmd 0
ChipID 2
ChipID 1
ChipID 0
HubID 4
HubID 3
HubID 2
HubID 1
HubID 0
Table 21. Serial Management Interface Command Set
Command
Value
Name
Usage
Normally
Sent By
Description
18 (Hex)
Write
Normal Ops
Network Mgr
Used to write up to 2 registers (8 bytes) at a time.
04 (Hex)
Read
Normal Ops
Network Mgr
Used to read up to 127 registers at a time.
08 (Hex)
Request ID
Arbitration
LXT980
Requests Hub ID. Repeated periodically.
00 (Hex)
ConfigChg
Arbitration
LXT980
Notifies system of configuration change (hot swap).
Requests new arbitration phase.
10 (Hex)
Re-arbitrate
Arbitration
Network Mgr
Re-starts arbitration.
14 (Hex)
Assign HubID
Arbitration
Mech. 2
Network Mgr
Assigns Hub ID to device with ARBIN=0 and ARBOUT = 1
(top of chain).
0C (Hex)
Set Arbout to 1
Arbitration
Mech. 2
Network Mgr
Commands specific device to set ARBOUT to 1.
1C (Hex)
Set Arbout to 0
Arbitration
Mech. 2
Network Mgr
Commands specific device to set ARBOUT to 0.
02 (Hex)
DevID
Config
Network Mgr
Asks device to send contents of device revision register.
Hub ID
5 bits
Data
(0-508 bytes)
Chip ID
3 bits
Cmd
5 bits
Length
7 bits
Address
12 bits
Start
Flag
Header
CRC
(2 bytes)
Stop
Flag
Idle
Idle
Header Content:
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