Port0:0B5H / Port1:N/A D_Ep0Intstat (Device Ep0 Interrupt Status) - Epson S2R72V18 Technical Manual

3. Register Details
3.2.4

Port0:0B5h / Port1:N/A D_EP0IntStat (Device EP0 Interrupt Status)

Base Address: Port0=000h, Port1=200h
Mode Ofst Adrs Register Name
Device 0B5h D_EP0IntStat
This indicates the endpoint EP0 interrupt status. Writing "1" to each bit clears the interrupt factors.
Bit7 DescriptorCmp
Directly specifies interrupt factors.
This is set to "1" when the Descriptor reply function returns the data quantity set in the
DescriptorSize register.
It is also set to "1" together with the OUT_TranNAK bit when switching to the status stage (on
receipt of OUT token) before sending the quantity set in the DescriptorSize register.
Bit6 OUT_ShortACK
Directly specifies interrupt factors.
This is set to "1" concurrently with OUT_TranACK when a short packet is received in an OUT
transaction and an ACK is returned in response.
Bit5 IN_TranACK
Directly specifies interrupt factors.
This is set to "1" when an ACK is received in an IN transaction.
Bit4 OUT_TranACK
Directly specifies interrupt factors.
This is set to "1" when an ACK is returned in an OUT transaction.
Bit3 IN_TranNAK
Directly specifies interrupt factors.
This is set to "1" when a NAK is returned in an IN transaction.
Bit2 OUT_TranNAK
Directly specifies interrupt factors.
This is set to "1" when a NAK is returned in response to an OUT or PING transaction.
276
R/W Bit Symbol
R (W) 7: DescriptorCmp
R (W) 6: OUT_ShortACK
R (W) 5: IN_TranACK
R (W) 4: OUT_TranACK
R (W) 3: IN_TranNAK
R (W) 2: OUT_TranNAK
R (W) 1: IN_TranErr
R (W) 0: OUT_TranErr
EPSON
Description
0: None 1: Descriptor Complete
0: None 1: OUT Short-Packet ACK
0: None 1: IN Transaction ACK
0: None 1: OUT Transaction ACK
0: None 1: IN Transaction NAK
0: None 1: OUT Transaction NAK
0: None 1: IN Transaction Error
0: None 1: OUT Transaction Error
S2R72V18 Technical Manual (Rev.1.00)
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