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| 型號(hào)： | M66596FP |
| 元件分類： | 總線控制器 |
| 英文描述： | UNIVERSAL SERIAL BUS CONTROLLER, PQFP64 |
| 封裝： | 0.50 MM PITCH, LQFP-64 |
| 文件頁(yè)數(shù)： | 119/133頁(yè) |
| 文件大?。?/td> | 1611K |
| 代理商： | M66596FP |
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M66596FP/WG
rev .1.00
2006.3.14
page 84 of 127
3.4.3.6 BRDY interrupt timing selection function
By setting the BFRE bit of the PIPECFG register, it is possible to keep the BRDY interrupt from being
generated when a data packet consisting of the maximum packet size is received.
When using DMA transfers, this function can be used to generate an interrupt only when the last data item
has been received. The “l(fā)ast data item” refers to the reception of a short packet, or the ending of the transaction
counter. When a short packet has been received, the BRDY interrupt is generated after the received data has
been read. When the BRDY interrupt is generated, the length of the data received in the last data packet to have
been received can be confirmed.
Table 3.21 shows the timing at which the BRDY interrupts are generated by the controller.
Table 3.21Timing at which BRDY interrupts are generated
Register setting
Buffer state when packet is received
BFRE = “0”
BFRE = “1”
Buffer full
When packet is
received
Not generated
Zero-Length packet received
When packet is
received
When packet is received
Normal packet received
When packet is
received
When reading of the received data from
the buffer memory has been completed
Transaction counter ended
When packet is
received
When reading of the received data from
the buffer memory has been completed
This function is valid only in the direction of reading from the buffer memory. In the writing direction, the BFRE bit
should be fixed at “0”.
3.4.4
Timing at which the FIFO port can be accessed
This chapter explains the access timing to FIFO port. When there is no description, both a Host and Peripheral are
the same operation.
3.4.4.1 Timing at which the FIFO port can be accessed when switching pipes
Figure 3.23 shows a diagram of the timing up to the point where the FRDY bit and DTLN bit are determined when
the pipe specified by the FIFO port has been switched (the CURPIPE bit of the C/DxFIFOSEL register has been
changed).
If the CURPIPE bit has been changed, access to the FIFO port should be carried out after waiting 450 ns after
writing to the C/DxFIFOSEL register.
The same timing applies with respect to the CFIFO port, when the ISEL bit is changed.
Indefinite
WR N
CURPIPE
FRDY
DTLN
max 450ns
max 100ns
min 20ns
PIPE-A
PIPE-B
Writing of the CURPIPE bit
Figure 3.23 Timing at which the FRDY and DTLN bits are determined after changing a pipe
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M66596FP#RB0Z | 制造商:Renesas Electronics Corporation 功能描述:MCU - Trays 制造商:Renesas Electronics 功能描述:USB Device Controller 64-Pin LQFP Cut Tape 制造商:Renesas Electronics 功能描述:USB Device Controller 64-Pin LQFP Tray 制造商:Renesas 功能描述:USB Device Controller 64-Pin LQFP |
| M66596FPRB0Z | 制造商:Renesas Electronics Corporation 功能描述:USB2.0 Dual Function Controller,LQFP64 |
| M66596WG | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:ASSP (USB2.0 Dual Function Controller) |
| M66596WG#RB0Z | 制造商:Renesas Electronics 功能描述:Tray 制造商:Renesas 功能描述:0 |
| M6668 | 制造商:Tamura Corporation of America 功能描述: |
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