XR21V1412IL32-F Exar Corporation, XR21V1412IL32-F Datasheet - Page 21

• Manufacturer Part Number: XR21V1412IL32-F
• Description: IC UART FIFO USB DUAL 32QFN
• Manufacturer: Exar Corporation
• Type: USB UARTsr

Specifications of XR21V1412IL32-F

• Package / Case: 32-VFQFN Exposed Pad
• Features: *
• Number Of Channels: 2, DUART
• Fifo's: 128 Byte, 384 Byte
• Protocol: USB 2.0
• Voltage - Supply: 2.97 V ~ 3.63 V
• With Auto Flow Control: Yes
• Mounting Type: Surface Mount
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Supply Current: 16 mA
• Operating Supply Voltage: 2.97 V to 3.63 V
• No. Of Channels: 2
• Data Rate: 12Mbps
• Uart Features: Automatic Hardware And Software Flow Control, Half-Duplex Mode, Fractional Baud Rate Generator
• Supply Voltage Range: 2.97V To 3.63V
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 1016-1301 - EVAL BOARD FOR XR21V1412IL
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 1016-1302

REV. 1.1.0
FLOW_CONTROL[2:0]: Flow control mode select
FLOW_CONTROL[3]: Half-Duplex Mode
FLOW_CONTROL[7:4]: Reserved
These bits are reserved and should remain ’0’.
The XON_CHAR and XOFF_CHAR registers store the XON and XOFF characters, respectively, that are used
in the Automatic Software Flow control. If the V1412 is configured in multidrop mode, the XON_CHAR and
XOFF_CHAR registers are instead used for address matching.
XON_CHAR[7:0]: XON Character
In Automatic Software Flow control mode, the UART will resume data transmission when the XON character
has been received.
For behavior in the Address Match mode, see
page
XOFF_CHAR[7:0]: XOFF Character
In Automatic Software Flow control mode, the UART will suspend data transmission when the XOFF character
has been received.
For behavior in the Address Match mode, see
page
This register reports any errors that may have occurred on the line such as break, framing, parity and overrun.
ERROR_STATUS[2:0]: Reserved
These bits are reserved. Any values read from these bits should be ignored.
ERROR_STATUS[3]: Break error
3.3.7
3.3.8
Logic 0 = Normal (full-duplex) mode. The UART can transmit and receive data at the same time.
Logic 1 = Half-duplex Mode. In half-duplex mode, any data on the RX pin is ignored when the UART is
transmitting data.
Logic 0 = No break condition
Logic 1 = A break condition has been detected (clears after read).
11.
11.
M
ODE
0
1
2
3
4
XON_CHAR, XOFF_CHAR Register Descriptions (Read/Write)
ERROR_STATUS Register Description - Read-only
B
IT
0
0
0
0
1
-2 B
IT
0
0
1
1
0
-1 B
IT
0
1
0
1
0
T
-0
ABLE
No flow control, no address matching.
HW flow control enabled. Auto RTS/CTS or DTR/DSR must be selected by
GPIO_MODE.
SW flow control enabled
Multidrop mode - RX only after address match, TX independent. (Typically
used with GPIO_MODE 3)
Multidrop mode - RX / TX only after address match. (Typically used with
GPIO_MODE 4)
13: F
LOW
“Section 1.5.7, Multidrop Mode with address matching” on
“Section 1.5.7, Multidrop Mode with address matching” on
C
ONTROL
21
M
ODE
M
ODE
S
ELECTION
D
ESCRIPTION
2-CH FULL-SPEED USB UART
XR21V1412