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參數(shù)資料
| 型號： | ST92163N4 |
| 英文描述： | 8/16-BIT FULL SPEED USB MCU FOR COMPOSITE DEVICES WITH 16 ENDPOINTS. 20K ROM. 2K RAM. I 2 C. SCI. & MFT |
| 中文描述： | 16位產(chǎn)品全速USB微控制器，16終點復(fù)合設(shè)備。 20,000光盤。 2K的RAM。余2長脊髓損傷。 |
| 文件頁數(shù)： | 142/230頁 |
| 文件大?。?/td> | 2743K |
| 代理商： | ST92163N4 |
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ST92163 - USB PERIPHERAL (USB)
USB INTERFACE (
Cont’d
)
Bit 0 = Reserved. This bit is fixed by hardware at 0.
INTERRUPT STATUS REGISTER (USBISTR)
R249 - Read/Write
Register page: 15
Reset Value: 0000 0000 (00h)
Each bit is set by hardware when the related event
occurs.
If one of these bits is set, the hardware clears the
CTRO bit and sets the V[3:0] bits in the USBIVR
register. In this way the USBIVR register will point
to the interrupt vector containing the address of
the service routine related to these interrupt sourc-
es. If several bits are set only a single interrupt will
be generated.
Note:
to avoid spurious clearing of some bits, it is
recommended to clear them with a load instruction
where all bits which must not be altered are set to
1, and all bits to be cleared are set to 0. Read-
modify-write instructions like AND, XOR,... are to
be avoided: consider the case of clearing bit 0 of
USBISTR with an AND instruction, when only bit 7
of USBISTR is at 1 and the others at 0. First the
microcontroller reads the content of USBISTR
(=10h), then it clears bit 7 and writes the result
(=00h) in USBISTR. If between the read and the
write operations another bit were set by hardware
(e.g. bit 5), writing 00h would clear it before the mi-
croprocessor has the time to service the event.
Table 26. Classification of Interrupt Sources:
Bit 7 = Reserved. This bit is fixed by hardware
at 0.
Bit 6 =
DOVR
:
DMA over/underrun
.
ST9 processor has not been able to answer a
DMA request in time and the USB FIFO buffer is
full or empty depending on the transfer direction
(reception or transmission).
The USB handles this event in the following way:
during reception the ACK handshake packet is not
sent, during transmission a bit-stuffing error is
forced on the transmitted stream. In both cases
the host will retry the transaction. The DOVR inter-
rupt should never occur during normal operations.
Bit 5 =
ERR
:
Error
.
One of the errors listed below has occurred:
–
NANS
: No answer. The timeout for a host re-
sponse has expired.
–
CRC
: CRC error. One of the received CRCs, ei-
ther in the token or in the data, was wrong.
–
BST
: Bit Stuffing error. A bit stuffing error was
detected anywhere in the PID, data, and/or CRC.
–
FVIO
: Framing format violation. A nonstandard
frame was received (EOP not in the right place,
wrong token sequence, etc.).
–
BUFOVR
: Buffer overrun. A packet longer than
the allocated DMA buffer has been received.
7
0
0
DOVR
ERR
ESUSP
SUSP
RESET
SOF
ESOF
Interrupt
DOVR
ERR
ESUSP
SUSP
RESET
SOF
ESOF
Class
DMA Over/Underrun event
Notification event
Notification event
Notification event
Notification event
Notification event
Notification event
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| ST92163R4 | 8/16-BIT FULL SPEED USB MCU FOR COMPOSITE DEVICES WITH 16 ENDPOINTS. 20K ROM. 2K RAM. I 2 C. SCI. & MFT |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ST92163N4B0 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8/16-BIT FULL SPEED USB MCU FOR COMPOSITE DEVICES WITH 16 ENDPOINTS, 20K ROM, 2K RAM, I2C, SCI, & MFT |
| ST92163N4B0E | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8/16-BIT FULL SPEED USB MCU FOR COMPOSITE DEVICES WITH 16 ENDPOINTS, 20K ROM, 2K RAM, I2C, SCI, & MFT |
| ST92163N4B0L | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8/16-BIT FULL SPEED USB MCU FOR COMPOSITE DEVICES WITH 16 ENDPOINTS, 20K ROM, 2K RAM, I2C, SCI, & MFT |
| ST92163N4B0V | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8/16-BIT FULL SPEED USB MCU FOR COMPOSITE DEVICES WITH 16 ENDPOINTS, 20K ROM, 2K RAM, I2C, SCI, & MFT |
| ST92163N4B1 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8/16-BIT FULL SPEED USB MCU FOR COMPOSITE DEVICES WITH 16 ENDPOINTS, 20K ROM, 2K RAM, I2C, SCI, & MFT |
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