XR21V1412_10 Datasheet, PDF (13/30 Pages) Exar Corporation – 2-CH FULL-SPEED USB UART

XR21V1412
REV. 1.1.0
2-CH FULL-SPEED USB UART
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
DEV SET_FEATURE
EP SET_FEATURE
0x00
0x00
0x02
3
1 00 0
0
0
0
Device remote wake-up
3
20
0 test 0 0
Test mode
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
13