xr21b1411 Exar Corporation, xr21b1411 Datasheet - Page 11

• Manufacturer Part Number: xr21b1411
• Description: Enhanced 1-ch Full-speed Usb Uart
• Manufacturer: Exar Corporation

REV. 1.1.0
N
N
OTE
OTE
: 1) Line coding length field are defined in
: 2) Control Signal Bitmap values for SetControlLineState are defined in
XR_GET_REG
XR_SET_REG
N
AME
B
O
IT
D15..D2
FFSET
P
0
4
5
6
D1
D0
OSITION
bCharFormat
dwDTERate
bParityType
bDataBits
R
F
Reserved (Reset to zero)
Carrier control for half duplex modems. This signal corresponds to RS-232 signal
RTS.
The device ignores the value of this bit when operating in full duplex mode
Indicates to DCE if DTE is present or not. This signal corresponds to RS-232 sig-
nal DTR.
EQUEST
0xC0
T
0x40
IELD
YPE
0 = Deactivate carrier (Clear RTS)
1 = Activate carrier (Set RTS)
0 = Not present (Clear DTR)
1 = Present (Set DTR)
T
ABLE
T
R
ABLE
EQUEST
2: S
S
0
1
T
IZE
4
1
1
1
ABLE
4: SET_CONTROL_LINE_STATE
UPPORTED
Table 3
LSB
val
3: SET_LINE_CODING
0
Number
Number
Number
Number
V
V
ALUE
ALUE
MSB
USB C
val
0
11
D
Data terminal rate, in bits per second
Stop bits:
(1.5 stop bits not supported in B1411)
Parity:
Data bits (7, 8 or 9)
regis-
regis-
addr.
addr.
LSB
LSB
ESCRIPTION
ter
ter
ONTROL
0 = 1 Stop bit
2 = 1 Stop bits
0 = None
1 = Odd
2 = Even
3 = Mark
4 = Space
I
NDEX
ENHANCED 1-CH FULL-SPEED USB UART
regis-
regis-
addr.
addr.
MSB
MSB
ter
ter
C
OMMANDS
Table 4
D
0
2
ESCRIPTION
L
ENGTH
0
0
Exar custom command: set
Exar custom register: get
val: 12-bit register value
register address: see
register address: see
one 12-bit register
one 12-bit register
D
ESCRIPTION
Table 5
Table 5
XR21B1411