28 USB FUNCTION CONTROLLER (USB)
28-28
Seiko Epson Corporation
S1C33L26 TECHNICAL MANUAL
EPrIntStat (EPr Interrupt Status)
Register name Address
Bit
Name
Setting
Init. R/W
Remarks
EPrIntStat
(EPr interrupt
status)
0x300c02
(8 bits)
D7–4 –
–
–
–
0 when being read.
D3
EPdIntStat
1 EPd interrupt
0 None
0
R
D2
EPcIntStat
1 EPc interrupt
0 None
0
R
D1
EPbIntStat
1 EPb interrupt
0 None
0
R
D0
EPaIntStat
1 EPa interrupt
0 None
0
R
D[7:4]
Reserved
D3
EPdIntStat
Shows a cause of interrupt indirectly.
When the EPdIntStat register has a cause of interrupt and the EPdIntEnb register bit corresponding to
the cause of interrupt is enabled, this bit is set to 1.
D2
EPcIntStat
Shows a cause of interrupt indirectly.
When the EPcIntStat register has a cause of interrupt and the EPcIntEnb register bit corresponding to
the cause of interrupt is enabled, this bit is set to 1.
D1
EPbIntStat
Shows a cause of interrupt indirectly.
When the EPbIntStat register has a cause of interrupt and the EPbIntEnb register bit corresponding to
the cause of interrupt is enabled, this bit is set to 1.
D0
EPaIntStat
Shows a cause of interrupt indirectly.
When the EPaIntStat register has a cause of interrupt and the EPaIntEnb register bit corresponding to
the cause of interrupt is enabled, this bit is set to 1.
DMA_IntStat (DMA Interrupt Status)
Register name Address
Bit
Name
Setting
Init. R/W
Remarks
DMA_IntStat
(DMA interrupt
status)
0x300c03
(8 bits)
D7–2 –
–
–
–
0 when being read.
D1
DMA_CountUp
1 DMA counter overflow
0 None
0
R(W)
D0
DMA_Cmp
1 DMA complete
0 None
0
R(W)
This register displays the interrupt status of the DMA.
D[7:2]
Reserved
D1
DMA_CountUp
Shows a cause of interrupt directly.
Set to 1 when values of DMA_Count_HH, HL, LH and LL overflow while the DMA operates in the
free run mode. Then values of DMA_Count_HH, HL, LH and LL return to 0, and the DMA operation
continues.
D0
DMA_Cmp
Shows a cause of interrupt directly.
Set to 1 when the DMA is stopped or completes the specified number of transfer operations and the end
processing.
FIFO_IntStat (FIFO Interrupt Status)
Register name Address
Bit
Name
Setting
Init. R/W
Remarks
FIFO_IntStat
(FIFO interrupt
status)
0x300c04
(8 bits)
D7
DescriptorCmp
1 Descriptor complete
0 None
0
R(W)
D6–2 –
–
–
–
0 when being read.
D1
FIFO_IN_Cmp
1 IN FIFO Complete
0 None
0
R(W)
D0
FIFO_OUT_Cmp
1 OUT FIFO complete
0 None
0
R(W)
This register displays the interrupt status of the FIFO.