XR21V1414IM48-F Exar Corporation, XR21V1414IM48-F Datasheet - Page 27

• Manufacturer Part Number: XR21V1414IM48-F
• Description: IC UART FIFO USB QUAD 48TQFP
• Manufacturer: Exar Corporation
• Type: USB UARTsr

Specifications of XR21V1414IM48-F

• Package / Case: 48-TQFP
• Features: *
• Number Of Channels: 1, UART
• Fifo's: 128 Byte
• Protocol: USB 2.0
• Voltage - Supply: 3.3V
• 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: 4
• 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: 1016-1303 - EVAL BOARD FOR XR21V1414IM
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 1016-1304

REV. 1.1.0
This register enables the Wide mode functionality for the UART.
WIDE_MODE[0]: Enable wide mode
WIDE_MODE[7:1]: Reserved
These bits are reserved and should remain ’0’.
This register is automatically set to logic ’1’ for baud rates below 46921 bps, and can be manually set for baud
rates of 46921 bps and higher. This register enables the Low latency feature of the UART. Write to this
register following any desired baud rate setting change.
LOW_LATENCY[0]: Enable Low Latency mode
LOW_LATENCY[7:1]: Reserved
These bits are reserved and should remain ’0’.
This register is used to enable / disable GPIO status in the high data byte of the custom interrupt packet. See
Table 16, “Interrupt Packet Format,” on page 28 and Table 18, “Data Field of Customized Interrupt Packet -
Exar Vendor Specific,” on page 29.
CUSTOM_INT_PACKET[0]: GPIO1
CUSTOM_INT_PACKET[1]: GPIO2
CUSTOM_INT_PACKET[2]: Reserved
CUSTOM_INT_PACKET[3]: GPIO0
CUSTOM_INT_PACKET[4]: GPIO3
CUSTOM_INT_PACKET[5]: GPIO4
3.4.1
3.4.2
3.4.3
Logic 0 = Normal (7, 8 or 9 bit data) mode
Logic 1 = Wide mode - See
Wide Mode Receive” on page
Logic 0 = Receive data is not forwarded from the Rx FIFO until bMaxPacketSize (64 bytes) or timeout (3
characters) has occurred.
Logic 1 = All data in the RX FIFO is provided to the USB host at the next BULK IN request irrespective of the
number of bytes in the FIFO.
Logic 0 = Disable GPIO1 status in custom interrupt packet.
Logic 1 = Enable GPIO1 status in custom interrupt packet.
Logic 0 = Disable GPIO2 status in custom interrupt packet.
Logic 1 = Enable GPIO2 status in custom interrupt packet.
This bit is reserved and should remain ’0’.
Logic 0 = Disable GPIO0 status in custom interrupt packet.
Logic 1 = Enable GPIO0 status in custom interrupt packet.
Logic 0 = Disable GPIO3 status in custom interrupt packet.
Logic 1 = Enable GPIO3 status in custom interrupt packet.
WIDE_MODE Register Description (Read/Write)
LOW_LATENCY Register Description (Read/Write)
CUSTOM_INT_PACKET (Read/Write)
“Section 1.5.1.1, Wide Mode Transmit” on page 11
11.
27
4-CH FULL-SPEED USB UART
and
“Section 1.5.2.1,
XR21V1414