c8051t623-g Silicon Laboratories, c8051t623-g Datasheet - Page 129
c8051t623-g
Manufacturer Part Number
c8051t623-g
Description
Full Speed Usb Eprom Mcu Family
Manufacturer
Silicon Laboratories
Datasheet
1.C8051T623-G.pdf
(247 pages)
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C8051T622/3 and C8051T326/7
USB Register Definition 18.16. CMIE: USB0 Common Interrupt Enable
USB Register Address = 0x0B
18.9. The Serial Interface Engine
The Serial Interface Engine (SIE) performs all low level USB protocol tasks, interrupting the processor
when data has successfully been transmitted or received. When receiving data, the SIE will interrupt the
processor when a complete data packet has been received; appropriate handshaking signals are automat-
ically generated by the SIE. When transmitting data, the SIE will interrupt the processor when a complete
data packet has been transmitted and the appropriate handshake signal has been received.
The SIE will not interrupt the processor when corrupted/erroneous packets are received.
18.10. Endpoint0
Endpoint0 is managed through the USB register E0CSR (USB Register Definition 18.18). The INDEX reg-
ister must be loaded with 0x00 to access the E0CSR register.
An Endpoint0 interrupt is generated when:
1. A data packet (OUT or SETUP) has been received and loaded into the Endpoint0 FIFO. The OPRDY
2. An IN data packet has successfully been unloaded from the Endpoint0 FIFO and transmitted to the
3. An IN transaction is completed (this interrupt generated during the status stage of the transaction).
4. Hardware sets the STSTL bit (E0CSR.2) after a control transaction ended due to a protocol violation.
136
Name
Reset
7:4
Bit
Type
3
2
1
0
Bit
bit (E0CSR.0) is set to 1 by hardware.
host; INPRDY is reset to 0 by hardware.
RSUINTE
RSTINTE
SUSINTE
Unused
Name
SOFE
R
7
0
Unused. Read = 0000b. Write = don’t care.
Start of Frame Interrupt Enable.
0: SOF interrupt disabled.
1: SOF interrupt enabled.
Reset Interrupt Enable.
0: Reset interrupt disabled.
1: Reset interrupt enabled.
Resume Interrupt Enable.
0: Resume interrupt disabled.
1: Resume interrupt enabled.
Suspend Interrupt Enable.
0: Suspend interrupt disabled.
1: Suspend interrupt enabled.
R
6
0
R
5
0
Rev. 1.1
R
4
0
Function
SOFE
R/W
3
0
RSTINTE
R/W
2
1
RSUINTE SUSINTE
R/W
1
1
R/W
0
0
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