参数资料
型号: TSB43AA82GGW
厂商: TEXAS INSTRUMENTS INC
元件分类: 微控制器/微处理器
英文描述: 2 CHANNEL(S), 400M bps, SERIAL COMM CONTROLLER, PBGA176
封装: PLASTIC, BGA-176
文件页数: 129/146页
文件大小: 770K
代理商: TSB43AA82GGW
71
7 Fast ORB Exchanger (FOX)
7.1
Command ORB Auto-Fetch Agent
7.1.1
Internal Agent Operation for Initiator
This section describes the internal command block fetch agent action for various accesses by four initiators.
Command block agent registers are located in the CSR address set by the command agent base offset (4Ch) and
the starting address of each command block agent is separated by a 20h offset.
Because the 1394 address space is in bytes, the command agent base offset address must be converted from
quadlets to bytes. To convert the command agent base offset address from quadlets to bytes, the command agent
offset address is multiplied by 4h.
AGENT_STATE Register
ORB_POINTER Register
(2 Quadlets)
Quadlet
Offset + 04h
UNSOLICITED_STATE_ENABLE Register
Offset Addressed in Bytes
= Command Agent Offset
Address at 4Ch * 4h
AGENT_RESET Register
Offset + 08h
Offset + 010h
Offset + 014h
DOORBELL Register
Offset + 018h
Reserved
Offset + 20h
Agent 0
Agent 1
Offset + 40h
Agent 2
Offset + 60h
Agent 3
Offset + 80h
Figure 71. Command Agent Registers
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