mcs7715 MosChip, mcs7715 Datasheet - Page 11
mcs7715
Manufacturer Part Number
mcs7715
Description
Usb 1.1 To Single Uart And Printer Port
Manufacturer
MosChip
Datasheet
1.MCS7715.pdf
(34 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
mcs7715CQ-GR
Manufacturer:
MOSCHIP
Quantity:
443
Part Number:
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Manufacturer:
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Rev. 1.6
Endpoint
Descriptor #5
Status Endpoint
Status Endpoint:
The Status Endpoint returns 4 Bytes every 1 millisecond. These four Bytes are status information of the
Parallel Printer port and the Serial port.
Description for Byte-4 of Status Endpoint.
•
•
•
•
Reserved Reserved
ParOutFifo Empty 1 Indicates the Bulk-Out FIFO is empty.
SerOutFifo Status
ParInFifo Empty
SerInFifo Status
Byte-1: Interrupt Identification Register of the Serial port (IIR)
Byte-2: Reserved (Unused)
Byte-3: Device Status Register of the Parallel Printer port (DSR)
Byte-4: FIFO status of both the Parallel Printer port and the Serial port.
ParOutFifo Full
Bit[7]
ParInFifo Full
Bit
Bit[6]
(Bytes)
Offset
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.
0 indicates the Bulk-Out FIFO is filled with Tx Data.
1 indicates the Bulk-In FIFO is filled with Rx Data.
0 indicates the Bulk-In FIFO is empty.
0
1
2
3
4
6
SerInFifo
Status
Bit[5]
bEndpointAddress
wMaxPacketSize
bDescriptorType
Field Name
bmAddress
SerOutFifo
bInterval
bLength
Status
Bit[4]
ParOutFifo
Empty
Bit[3]
(Bytes)
Description
Size
USB 1.1 to Single UART and Printer Port
1
1
1
1
2
1
ParOutFifo
Value
04,00
(hex)
07
05
87
03
01
Bit[2]
Full
Descriptor Length = 7 Bytes
MCS7715
Endpoint-7, direction: IN
(Parallel Printer Port)
(Parallel Printer Port)
(Parallel Printer Port)
(Parallel Printer Port)
ParInFifo
Packet Size = 4 Bytes
Polling Interval (1mS)
Empty
Bit[1]
Type = ENDPOINT
Interrupt Endpoint
(Serial Port)
(Serial Port)
Comments
ParInFifo
Bit[0]
Full
Page 11