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參數資料
型號: ISP1362
廠商: NXP Semiconductors N.V.
英文描述: Single-chip Universal Serial Bus On-The-Go controller
中文描述: 單芯片通用串行總線和On - The - Go控制器
文件頁數: 122/150頁
文件大小: 647K
代理商: ISP1362
Philips Semiconductors
ISP1362
Single-chip USB OTG controller
Product data
Rev. 03
06 January 2004
122 of 150
9397 750 12337
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
16.2.4
Validate Endpoint Buffer (61H
6FH)
This command signals the presence of valid data for transmission to the USB host, by
setting the Buffer Full
fl
ag of the selected IN endpoint. This indicates that the data in
the buffer is valid and can be sent to the host, when the next IN token is received. For
a double-buffered endpoint, this command switches the current buffer memory for
CPU access.
Remark:
For special aspects of the control IN endpoint, see
Section 13.3.6
.
Code (Hex): 61 to 6F
validate endpoint buffer (control IN, endpoint 1 to 14)
Transaction
none (code only)
16.2.5
Clear Endpoint Buffer (70H, 72H
7FH)
This command unlocks and clears the buffer of the selected OUT endpoint, allowing
the reception of new packets. Reception of a complete packet causes the Buffer Full
fl
ag of an OUT endpoint to be set. Any subsequent packets are refused by returning a
NAK condition, until the buffer is unlocked using this command. For a double-buffered
endpoint, this command switches the current buffer memory for CPU access.
Remark:
For special aspects of the control OUT endpoint, see
Section 13.3.6
.
Code (Hex): 70, 72 to 7F
clear endpoint buffer (control OUT, endpoint 1 to 14)
Transaction
none (code only)
16.2.6
DcEndpointStatusImage register (D0H
DFH)
This command is used to check the status of the selected endpoint buffer memory
without clearing any status or interrupt bits. The command accesses the
DcEndpointStatusImage register, which contains a copy of the DcEndpointStatus
register. The bit allocation of the DcEndpointStatusImage register is shown in
Table 126
.
Code (Hex): D0 to DF
check status (control OUT, control IN, endpoint 1 to 14)
Transaction
write or read 1 byte (code or data)
Table 126: DcEndpointStatusImage register: bit allocation
Bit
7
Symbol
EPSTAL
EPFULL1
6
5
4
3
2
1
0
EPFULL0
DATA_PID
OVER
WRITE
0
R
SETUPT
CPUBUF
reserved
Reset
Access
0
R
0
R
0
R
0
R
0
R
0
R
-
-
Table 127: DcEndpointStatusImage register: bit description
Bit
Symbol
Description
7
EPSTAL
This bit indicates whether the endpoint is stalled or not
(1 = stalled; 0 = not stalled).
6
EPFULL1
Logic 1 indicates that the secondary endpoint buffer is full.
5
EPFULL0
Logic 1 indicates that the primary endpoint buffer is full.
4
DATA_PID
This bit indicates the data PID of the next packet
(0 = DATA0 PID; 1 = DATA1 PID).
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