XR21V1412IL-0A Datasheet, PDF (14/32 Pages) Exar Corporation – 2-CH FULL-SPEED USB UART

XR21V1412
2-CH FULL-SPEED USB UART
REV. 1.3.0
2.0 USB CONTROL COMMANDS
The following table shows all of the USB Control Commands that are supported by the V1412. Commands
included are standard USB commands, CDC-ACM commands and custom Exar commands. .
TABLE 4: SUPPORTED USB CONTROL COMMANDS
NAME
REQUEST
TYPE
REQUEST
VALUE
INDEX
LENGTH
DESCRIPTION
DEV GET_STATUS
0x80
0
00
0
0 2 0 Device: remote wake-up +
self-powered
IF GET_STATUS
0x81
0
0 0 1-4, 0 2 0
129-
132
Interface: zero
EP GET_STATUS
0x82
0
0 0 0-4, 0 2 0
129-
136
Endpoint: halted
DEV CLEAR_FEATURE
EP CLEAR_FEATURE
0x00
0x02
1
10
0
0 0 0 Device remote wake-up
1
0 0 0-4, 0 0 0
129-
136
Endpoint halt
DEV SET_FEATURE
0x00
3
1 00 0
0
0
0
Device remote wake-up
DEV SET_FEATURE
0x00
3
20
0 test 0 0
Test mode
EP SET_FEATURE
0x02
3
0 0 0-4, 0 0 0
129-
136
Endpoint halt
SET_ADDRESS
GET_DESCRIPTOR
0x00
0x80
GET_DESCRIPTOR
0x80
GET_CONFIGURATION
SET_CONFIGURATION
GET_INTERFACE
CDC_ACM_IF
SET_LINE_CODING
CDC_ACM_IF
GET_LINE_CODING
CDC_ACM_IF
SET_CONTROL_LINE_
STATE
0x80
0x00
0x81
0x21
0xA1
0x21
5
addr 0
0
000
6
01
0
0 len len
Device descriptor
LSB MSB
6
02
0
0 len len
Configuration descriptor
LSB MSB
8
00
0
010
9
n0
0
000
10
0 0 0-7 0 1 0
32
0 0 0, 2, 0 7 0 Set the UART baud rate,
4, 6
parity, stop bits, etc.
33
0 0 0, 2, 0 7 0 Get the UART baud rate,
4, 6
parity, stop bits, etc.
34
val 0 0, 2, 0 0 0
4, 6
Set UART control lines
14