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SL811HS
Document 38-08008 Rev. *D Page 16 of 32
Interrupt Enable Register, Address [06h] . The SL811HS
provides an Interrupt Request Output that is activated
resulting from a number of conditions. The Interrupt Enable
register allows the user to select events that generate the
Interrupt Request Output assertion. A separate Interrupt
Status register is read in order to determine the condition that
initiated the interrupt (see the description in section Interrupt
Status Register, Address [0Dh]). When a bit is set to ‘1’, the
corresponding interrupt is enabled. Setting a bit in the Interrupt
Enable register does not effect the Interrupt Status register’s
value; it just determines which interrupts are output on INTRQ.
USB Address Register, Address [07h]. This register
contains the USB Device Address after assignment by USB
host during configuration. On power up or reset, USB Address
register is set to Address 00h. After USB configuration and
address assignment, the device recognizes only USB transac-
tions directed to the address contained in the USB Address
register.
Interrupt Status Register, Address [0Dh]. This read/write
register serves as an Interrupt Status register when it is read,
and an Interrupt Clear register when it is written. To clear an
interrupt, write the register with the appropriate bit set to ‘1’.
Writing a ‘0’ has no effect on the status.
Table 30. Interrupt Enable Register [Address: 06h]
7 6 5 4 3 2 1 0
DMA Status USB Reset SOF Received DMA Done Endpoint 3
Done
Endpoint 2
Done
Endpoint 1
Done
Endpoint 0
Done
Bit Position Bit Name Function
7 DMA Status When equal to ‘1’, indicates DMA transfer is in progress. When equal to ‘0’, indicates DMA
transfer is complete.
6 USB Reset Enable USB Reset received interrupt when = ‘1’.
5 SOF Received Enable SOF Received Interrupt when = ‘1’.
4 DMA Done Enable DMA done Interrupt when = ‘1’.
3 Endpoint 3 Done Enable Endpoint 3 done Interrupt when = ‘1’.
2 Endpoint 2 Done Enable Endpoint 2 done Interrupt when = ‘1’.
1 Endpoint 1 Done Enable Endpoint 1 done Interrupt when = ‘1’.
0 Endpoint 0 Done Enable Endpoint 0 done Interrupt when = ‘1’.
Table 31. USB Address Register [Address 07h]
7 6 5 4 3 2 1 0
USBADD7 USBADD6 USBADD5 USBADD4 USBADD3 USBADD2 USBADD1 USBADD0
Table 32. Interrupt Status Register [Address 0Dh]
7 6 5 4 3 2 1 0
DMA Status USB Reset SOF Received DMA Done Endpoint 3
Done
Endpoint 2
Done
Endpoint 1
Done
Endpoint 0
Done
Bit Position Bit Name Function
7 DMA Status When equal to ‘1’, indicates DMA transfer is in progress. When equal to 0, indicates DMA
transfer is complete. An interrupt is not generated when DMA is complete.
6 USB Reset USB Reset Received Interrupt.
5 SOF Received SOF Received Interrupt.
4 DMA Done DMA Done Interrupt.
3 Endpoint 3 Done Endpoint 3 Done Interrupt.
2 Endpoint 2 Done Endpoint 2 Done Interrupt.
1 Endpoint 1 Done Endpoint 1 Done Interrupt.
0 Endpoint 0 Done Endpoint 0 Done Interrupt.