mcs7717 MosChip, mcs7717 Datasheet - Page 8

• Manufacturer Part Number: mcs7717
• Description: Three Port Usb Hub With 1 Serial, 1 Printer
• Manufacturer: MosChip

Page 8
MCS7717
Three Port USB Hub with 1 Serial, 1 Printer
Host Requests
All standard USB requests from the host are handled via Control Endpoint-0. The Control Endpoint can
handle a maximum of 8 Bytes per transfer.
This table shows the supported standard USB requests.
Note: the USB data transmission order is Least Significant Bit (LSB) first. In the following tables Multi-Byte
variables are displayed least significant Byte first.
Standard USB Requests
Standard USB Descriptors
These are the supported Standard USB Descriptors:
Address
Configuration
Descriptor
Feature
Status
Get Configuration Descriptor
Clear Endpoint (1) Feature
Get Endpoint (0) Status
Get Endpoint (1) Status
•
•
•
•
Get Device Descriptor
(REMOTE_WAKEUP)
Get Interface Status
Set Configuration-0
Set Configuration-1
Get Device Status
* The MSB specifies endpoint direction: 0 = OUT, 1 = IN. Either value is accepted.
** Device Address: 0 to 127
*** Returned Value (in Bytes)
Get Configuration
RequestName
(HALT/STALL)
Clear Feature
Device
Configuration
Interface
Endpoint
Set Address
bmRequestType
Byte 0 [7:0]
X000 0000
X000 0000
X000 0000
X000 0000
X000 0010
1000 0000
1000 0000
1000 0000
1000 0000
1000 0001
1000 0010
1000 0010
(bin)
bRequest
Byte 1
(hex)
05
08
09
09
06
06
01
01
00
00
00
00
address**
Byte 2, 3
wValue
00,00
00,00
01,00
00,02
00,01
01,00
00,00
00,00
00,00
00,00
00,00
(hex)
00/80, 00*
Byte 4, 5
wIndex
00,00
00,00
00,00
00,00
00,00
00,00
00,00
81,00
00,00
00,00
81,00
(hex)
wLength
Byte 6, 7
length***
length***
00,00
01,00
00,00
00,00
00,00
00,00
02,00
02,00
02,00
02,00
(hex)
none
Configuration Value = 0x01
none
none
Configuration, Interface, and
Endpoint Descriptors
Device Descriptor
none
none
Device Status
zero
Endpoint-0 Status
Endpoint-1 Status
Data
Rev. 1.7