XR21B1420IL28-0A Datasheet, PDF (17/60 Pages) Exar Corporation – Enhanced 1-Ch Full-Speed USB UART

XR21B1420
Table 4: Supported USB Control Commands
Name
CDC_ACM_IF
SEND_BREAK
XR_GET_CHIP_ID
XR_SET_REG
See Table 5
XR_GET_REG
See Table 5
XR_GET_REVISION
See Table 5
XR_SET_USB_STAT
See Table 5
XR_SET_USB_STAT
See Table 5
Request
Type
Request
Value
LSB MSB
Index
LSB
MSB
0x21
0x23
val
val
0x0
0x0
LSB MSB
0xC0
0xFF
0x0 0x0 0x0
0x0
0x41
0x0
0xC1 0x0
0xC0 0x0
0x40
0x0
0xC0 0x0
write-
data
LSB
0x0
0x0
write-
data
MSB
0x0
0x0
write
addr
read
addr
0x60
0x0
0x0
0x02
write-
data
LSB
0x0
write-
data
MSB
0x0
0x62
0x62
0x02
0x02
Length
LSB MSB
Description
0x0 0x0 Send a break for the speci-
fied duration.
0x6 0x0 Get Exar VID (2 bytes), PID
(2 bytes) and bcdDevice (2
bytes)
0x0 0x0 Vendor specific register
access.
0x2 0x0 Vendor specific register
access.
0x2 0x0 Vendor specific register
access.
0x0 0x0 Vendor specific register
access.
0x2 0x0 Vendor specific register
access.
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