參數(shù)資料
型號： TSB43AA82A1
廠商： Texas Instruments, Inc.
英文描述： 1394 integrated PHY and link layer controller(1394集成PHY和鏈路層控制器)
中文描述： 1394綜合物理層和鏈路層控制器（1394集成物理層和鏈路層控制器）
文件頁數(shù)： 91/146頁
文件大小： 597K
代理商： TSB43AA82A1
79
7.3.2.3 Link Abort and DEAD State
The host can change the command agent to the DEAD state. For example, when a task is aborted for some reason,
the command agent changes to a DEAD state. For more details, please refer to the SBP-2 standard. Setting Dead(n)
in the agent status register (5Ch) changes the state of the command agent into a DEAD state. Read requests
addressed to agent state from the initiator are automatically responded to with a DEAD state.
Quadlet write requests to the AGENT_RESET register (see Section 7.1.1) by the initiator allow the command agent
to recover from a DEAD state. This resets the command agent and changes the state back to IDLE.
7.3.2.4 SBP-2/Doorbell
The transaction for a write to the DOORBELL register (see Section 7.1.1) is explained below:
The TSB43AA82A agent is in suspended state when the ORB address shown in next_ORB or ORB_offset
shows dummy ORB (FFFF FFFF FFFF FFFFh). The initiator activates the command agent by transmitting
a quadlet write request to the DOORBELL register (see Section 7.1.1). When the quadlet write request is
received at the DOORBELL register by the command agent, DrBell(n) in the agent status register (5Ch) is
set to 1. When necessary, the host sets DrBClr(n) to 1 to clear DrBell(n). Figure 76 shows a typical
suspended and doorbell request.
NOTE:
The host cannot activate a suspended agent.
Quadlet Write Request
AgntWr_Int
DrBllx
COAF_Agent and CTQ
Notify Command ORB has
Effective Next ORB Address.
Target
Initiator
DOORBELL Register
Block Read Request
Dummy ORB Offset Address
Block Read Response
Command Agent
No Packet in CRF
CAgXRdy = 1 (When
Next ORB Exists)
Dummy ORB
Block Read Request
Command Block ORB Offset Address
Dummy ORB Response.
Contents of Packet Is Linked
Command ORB.
CRF
COREnd_Int
Clear DOORBELL (See Note 1)
Host Reads Out CRF
Command ORB
Status Block
Command ORB Response.
Contents of Packet Is Linked
Command ORB.
NOTE 1: The DOORBELL register can be cleared by setting DrBClr(n).
Figure 76. SUSPENDED and DOORBELL Request by Dummy ORB
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TSB43AA82AI 制造商:TI 制造商全稱:Texas Instruments 功能描述:1394 Integrated PHY and Link-Layer Controller for SBP-2 Products and DPP Products
TSB43AA82AIPGE 功能描述:1394 接口集成電路 Hi Perf Integr Phy & Link Layer Chip 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
TSB43AA82AIPGEEP 功能描述:1394 接口集成電路 Mil Enh Int PHY and Link-Layer Cntrlr 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
TSB43AA82APGE 功能描述:1394 接口集成電路 Hi Perf Integr Phy & Link Layer Chip 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
TSB43AA82APGEG4 功能描述:1394 接口集成電路 Hi Perf Integr Phy & Link Layer Chip 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
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