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參數(shù)資料
| 型號(hào)： | TUSB5052B |
| 廠(chǎng)商： | Texas Instruments, Inc. |
| 英文描述： | USB to 2-Serial + 1-Parallel Controller With Configurable Optional Hub |
| 中文描述： | USB轉(zhuǎn)2 -串行接口1 -可配置可選并行控制器集線(xiàn)器 |
| 文件頁(yè)數(shù)： | 68/84頁(yè) |
| 文件大小： | 276K |
| 代理商： | TUSB5052B |
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8.4.2
Host OUT Transaction
Figure 8–3 llustrates the data flow for a USB OUT transaction (from host to P-port), using the DMA transfer (DMA
in continues mode). The MCU sets the OEDB (Output-EDB) with the proper parameters (start-address, byte-count,
etc.). In addition, the MCU sets the DMA and P-port transfer direction. Once initialization completes, the MCU clears
the NAK bit to 0 (in OEDB-X) which starts the UBM data transfer from host to X-buffer. Once the X-buffer is full, the
UBM updates OEDB-X, sets NAK = 1, and notifies the DMA. The DMA toggles the X/Y-bit. UBM starts the transfer
from the host to the Y-buffer (X/Y-bit points to Y) and the DMA transfers from the X-buffer to P-port. The ping-pong
transfer continues until the MCU (or an error) halts the transfer. If the UBM does not transfer a full 64-bytes, it updates
the byte-count value (and sets NAK = 1) in OEDB to reflect the partial buffer size. The DMA uses this count to transfer
a partial packet to P-port and interrupt the MCU. Note that the UBM increments the byte-count and saves it in OEDB
at the end of the transfer. On the other hand, the DMA uses the byte-count from OEDB as the transfer count but does
not update the OEDB at the end of transfer, i.e., the UBM both increments and updates; whereas, the DMA only
decrements.
UBM
64 Byte
Y-Buffer
64 Byte
X-Buffer
DMA5
DIR = 0
PPDAT
Host
P-Port
UBM uses the X/Y-bit to
select X/Y-buffer. At the end of
the OUT transfer, UBM
updates the OEDB with the
byte count (and NAK = 1).
DMA sets the X/Y-bit. At DMA
uses the byte count in OEDB for
the transfer. At the end of
transfer DMA sets NAK = 0.
Figure 8–3. USB OUT Transaction to P-Port
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| TUSB5052PZ | 功能描述:USB 接口集成電路 5port Hub w/Int Brdg to 2-Serial Ports RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類(lèi)型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WLCSP-20 |
| TUSB5052PZG4 | 功能描述:USB 接口集成電路 5-port Hub with Int Bridge RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類(lèi)型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WLCSP-20 |
| TUSB5152 | 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:USB to 2-Serial 1-Parallel Controller With Configurable Optional Hub |
| TUSB5152PZ | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| TUSB522PEVM | 功能描述:EVAL BOARD FOR TUSB522P 制造商:texas instruments 系列:- 零件狀態(tài):在售 主要用途:接口，信號(hào)加強(qiáng)器 嵌入式:- 使用的 IC/零件:TUSB522P 主要屬性:2 通道（雙路） 輔助屬性:LED 狀態(tài)指示器 所含物品:板 標(biāo)準(zhǔn)包裝:1 |
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