參數(shù)資料
型號(hào): TSB12LV01B-EP
英文描述: FPGA (Field-Programmable Gate Array)
中文描述: 軍事增強(qiáng)塑料的高性能1394 3.3鏈路層電信。嵌入式
文件頁數(shù): 71/106頁
文件大?。?/td> 605K
代理商: TSB12LV01B-EP
5
15
DMCLK
DMRW
DMD[0:15]
DMREADY
DMPRE
DMDONE
Figure 5
22. Asynchronous Block Transmit With Automatic Header Insertion at 400 Mbps
5.2.6
Asynchronous Packet Transmit Without Automatic Header Insertion
Upon receiving a high on DMREADY, the following sequence of operations are performed:
Step 1:
DMDONE will be asserted low (deactivated) at the next DMCLK cycle.
Step 2:
DMPRE will pulse for one DMCLK cycle before the header quadlets are sent.
Step 3:
The data mover will fetch the headers by asserting DMRW high.
Step 4:
The data mover will then load the headers into the header0
header3 registers and request
the data to be transmitted out on the 1394 bus by the link core.
Step 5:
The link will fetch the headers.
Step 6:
DMPRE will pulse for one DMCLK cycle before the first data quadlet is sent.
Step 7:
The data mover will then begin to fetch the data payload by asserting DMRW high.
Step 8:
When the link core has fetched the last data quadlet, the data mover waits until the
destination node returns an
ack_complete
immediate response. If an
ack_complete
is not
received, the data mover will assert DMERROR high and become disabled.
Figure 5
23 and Figure 5
24 show the timing diagram for this mode for the quadlet transmit and the block
transmit cases, respectively. For simplicity, a data block size of three quadlets was selected in Figure 5
24.
DMCLK
DMRW
DMD[0:15]
DMREADY
DMPRE
DMDONE
Header Quadlets
Data Quadlet
Figure 5
23. Asynchronous Quadlet Transmit Without Automatic Header Insertion at 400 Mbps
DMCLK
DMRW
DMD[0:15]
DMREADY
DMPRE
DMDONE
Header Quadlets
Data Quadlets
Figure 5
24. Asynchronous Block Transmit Without Automatic Header Insertion at 400 Mbps
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參數(shù)描述
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TSB12LV01BPZT 功能描述:1394 接口集成電路 High Perf 1394 3.3V Link Layer 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
TSB12LV01BPZTG4 功能描述:1394 接口集成電路 High Perf 1394 3.3V Link Layer 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