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参数资料
| 型号： | S1R72V17B00A |
| 元件分类： | 总线控制器 |
| 英文描述： | UNIVERSAL SERIAL BUS CONTROLLER, PBGA60 |
| 封装： | 5 X 5 MM, 0.50 MM PITCH, PLASTIC, TFBGA-60 |
| 文件页数： | 35/45页 |
| 文件大小： | 3044K |
| 代理商： | S1R72V17B00A |
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6. Functional Description
S1R72V17*** Technical Manual (Rev.1.6)
EPSON
21
IN
DATA
ACK
c
ab
Host to Device
Device to Host
Fig. 6.3 IN transaction in device mode
6.2.2.5
Isochronous IN Transaction
If the FIFO for an IN-direction Isochronous endpoint has a quantity of data equivalent to the max
packet size or short packet transmission for that endpoint has been enabled by the firmware, the LSI
returns a data packet in response to the IN transaction.
Transmission of short packets (including packets of data length zero) is enabled by setting the
EPx{x=a-e}Control.EnShortPkt bit. When transmitting short packets, make sure that no new data is
written to the FIFO for the endpoint in question before the transaction is completed after packet
transmission has been enabled.
When a data packet is returned to the Isochronous IN transaction, the LSI completes the transaction
and issues an IN_TranACK status indication (EPx{x=a-e}IntStat.IN_TranACK bit) to the firmware.
It also updates the FIFO and frees the reserved area on the assumption that the transmission was
completed.
If the FIFO for an Isochronous IN-direction endpoint does not have a quantity of data equivalent to
the max packet size and short packet transmission for that endpoint has not been enabled by the
firmware, the LSI responds with a zero-length data packet for the IN transaction and issues an
IN_TranNAK status indication (EPx{x=a-e}IntStat.IN_TranNAK bit) to the firmware. It does not
update the FIFO, nor does it free the reserved area.
6.2.2.6
PING Transactions
At bulk OUT-direction endpoints, a PING transaction is executed when operating in HS mode.
If the FIFO for the corresponding endpoint has a free space equal to or greater than Max. packet
size, the LSI responds with ACK for the PING transaction. It does not issue a status to the firmware,
however.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| S1R72V17B00A20 | 制造商:Epson Electronics America Inc 功能描述:USB HS HOST/DEVICE CONTROLLER, |
| S1R72V18 | 制造商:EPSON 制造商全称:EPSON 功能描述:Built-in pull-down resistor for downstream ports (no external circuit required) |
| S1R72V27 | 制造商:EPSON 制造商全称:EPSON 功能描述:Built-in pull-down resistor for downstream ports (no external circuit required) |
| S1R77081F | 制造商:EPSON 制造商全称:EPSON 功能描述:RSDS Transmitter/Receiver |
| S1R8ADMTBK | 制造商:Hubbell Wiring Device-Kellems 功能描述:S1R FRPT 8 ABANDONMENT PLATE |
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