mcs7705 MosChip, mcs7705 Datasheet - Page 10

• Manufacturer Part Number: mcs7705
• Description: Usb 1.1 To Single Printer Port
• Manufacturer: MosChip

Page 10
MCS7705
USB 1.1 to Single Printer Port
Endpoint
Descriptor #3
Status Endpoint
Status Endpoint:
The Status Endpoint returns 4 Bytes every 1 millisecond. These four Bytes are status information of the
Parallel Printer port.
Description for Byte-4 of Status Endpoint.
•
•
•
•
Reserved Reserved Reserved
Byte-1: Reserved (Unused)
Byte-2: Reserved (Unused)
Byte-3: Device Status Register of the Parallel Printer port (DSR)
Byte-4: FIFO status of the Parallel Printer port.
ParOutFifo Empty
Bit[7]
ParInFifo Empty
ParOutFifo Full
ParInFifo Full
Bit
Bit[6]
(Bytes)
Offset
0
1
2
3
4
6
1 Indicates the Bulk-In FIFO is full.
1 Indicates the Bulk-In FIFO is empty.
1 Indicates the Bulk-Out FIFO is full.
1 Indicates the Bulk-Out FIFO is empty.
Bit[5]
bEndpointAddress
wMaxPacketSize
bDescriptorType
Field Name
bmAddress
bInterval
bLength
Reserved
Bit[4]
ParOutFifo
Empty
Bit[3]
(Bytes)
Size
Description
1
1
1
1
2
1
ParOutFifo
Value
04,00
(hex)
07
05
87
03
01
Bit[2]
Full
Descriptor Length = 7 Bytes
(Parallel Printer Port)
(Parallel Printer Port)
(Parallel Printer Port)
(Parallel Printer Port)
Endpoint-7, direction: IN
ParInFifo
Packet Size = 4 Bytes
Polling Interval (1mS)
Empty
Bit[1]
Type = ENDPOINT
Interrupt Endpoint
Comments
ParInFifo
Bit[0]
Full
Rev. 1.7