XR21B1411IL-0A-EB Datasheet, PDF (11/30 Pages) Exar Corporation – ENHANCED 1-CH FULL-SPEED USB UART

XR21B1411
REV. 1.2.0
ENHANCED 1-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 B1411. Commands
include standard USB commands, CDC-ACM commands and custom Exar commands. .
TABLE 2: SUPPORTED USB CONTROL COMMANDS
NAME
REQUEST
TYPE
REQUEST
VALUE
INDEX
LENGTH
DESCRIPTION
DEV GET_STATUS
0x80
0
0
0
0
0
2
0 Device: remote wake-up +
self-powered
IF GET_STATUS
0x81
0
0
0 0, 1 0
2
0
Interface: zero
EP GET_STATUS
0x82
0
0
0 0,1, 0
2
0
129,
133
Endpoint: halted
DEV CLEAR_FEATURE 0x00
1
1
0
0
0
0
0
Device remote wake-up
EP CLEAR_FEATURE 0x02
1
0
0 0,1, 0
0
0
129,
133
Endpoint halt
DEV SET_FEATURE
0x00
3
1
0
0
0
0
0
Device remote wake-up
DEV SET_FEATURE
0x00
3
2
0
0 test 0
0 Test mode - factory use only
EP SET_FEATURE
0x02
3
0
0
1,
0
0
0
129,
133
Endpoint halt
SET_ADDRESS
0x00
5
addr 0
0
0
0
0
GET_DESCRIPTOR
0x80
6
0
1
0
0 len len
LSB MSB
Device descriptor
GET_DESCRIPTOR
0x80
6
0
2
0
0
len len
LSB MSB
Configuration descriptor
GET_DESCRIPTOR
0x80
6
0
3
0
0 len len
LSB MSB
String descriptor
GET_CONFIGURATION 0x80
8
0
0
0
0
1
0
SET_CONFIGURATION 0x00
9
n
0
0
0
0
0
n = 0,1
GET_INTERFACE
0x81
10
0
0 0-1 0
1
0
CDC_ACM_IF
SET_LINE_CODING
0x21
32
0
0
0
0
7
0
(Note
1)
Set the UART baud rate,
parity, stop bits, etc.
CDC_ACM_IF
0xA1
33
0
0
0
0
7
0 _{Get the UART baud rate,}
GET_LINE_CODING
parity, stop bits, etc.
CDC_ACM_IF SET_-
CON-
TROL_LINE_STATE
0x21
34
val 0
0
0
0
0
(Note
Set UART control lines
2)
CDC_ACM_IF
SEND_BREAK
0x21
35
val val 0
LSB MSB
0
0
0 Send a break for the speci-
fied duration
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