參數(shù)資料
型號: ML60852
廠商: OKI SEMICONDUCTOR CO., LTD.
英文描述: USB Device Controller
中文描述: USB設(shè)備控制器
文件頁數(shù): 19/81頁
文件大?。?/td> 451K
代理商: ML60852
PEDL60852-01
1
Semiconductor
ML60852
19/81
(2) EP0 Receive packet ready interrupt
This is used mainly during the reception of a data packet in a control write transfer.
Operation
Source of operation
ML60852
Description (conditions, responses, etc.)
The EP0 receive packet ready bit (D0 of EP0STAT) is
asserted during a control write transfer when the
processing has changed from the setup stage to the data
stage, and the ML60852 has detected EOP of the data
packet and has stored the data without error in the EP0
receive FIFO. The end of a packet is recognized when an
EOP has arrived in the cases of both full packets and short
packets.
An interrupt is generated at this time, if the EP0 receive
packet ready interrupt enable bit (D6 of INTENBL1) has
been asserted.
(EOP: End of packet)
In the case of EP0 reception, after the number of bytes of
the EP0 receive FIFO data indicated by the EP0 receive
byte count register (EP0RXCNT) has been read, write a “1”
to the EP0 receive packet ready bit (bit D0 of EP0STAT).
(This status is reset when a “1” is written in this bit.)
EP0 Receive packet ready
interrupt generation
End of EP0 receive
packet ready interrupt
Local MCU (firmware)
Note:
A short packet is a packet with a number of bytes less than the maximum packet size.
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