XR21V1412IL32-F Exar Corporation, XR21V1412IL32-F Datasheet - Page 7

• 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
The USB interface of the V1412 is compliant with the USB 2.0 Full-Speed Specifications. The USB
configuration model presented by the V1412 to the device driver is compatible to the Abstract Control Model of
the USB Communication Device Class (CDC-ACM). The V1412 uses the following set of parameters:
Exar’s USB Vendor ID is 0x04E2. This is the default Vendor ID that is used for the V1412 unless a valid
EEPROM is present on the I2C interface signals. If a valid EEPROM is present, the Vendor ID from the
EEPROM will be used.
The default USB Product ID for the V1412 is 0x1412. If a valid EEPROM is present, the Product ID from the
EEPROM will be used.
The V1412 device can be used with either a standard CDC-ACM driver or a custom driver. When the CDC-
ACM driver is used, the driver has no knowledge of the V1412 device registers. Because of this, the V1412
device is initialized to the following settings:
1.0 FUNCTIONAL DESCRIPTIONS
1.1
1.2
1.1.1
1.1.2
1 Control Endpoint
1 Configuration is supported
2 interfaces per UART channel
GPIO_DIRECTION
FLOW_CONTROL
GPIO_INT_MASK
Endpoint 0 as outlined in the USB specifications
Each UART channel has a single interrupt endpoint
Each UART channel have bulk-in and bulk-out endpoints
GPIO_MODE
USB interface
USB Device Driver
R
EGISTER
USB Vendor ID
USB Product ID
T
ABLE
1: V1412 R
V
0x01
0x01
0x08
0x30
ALUE
EGISTER
DTR configured as an output (in addition to RTS which is set by
CD and DSR are interrupt sensitive, i.e. can cause a USB inter-
D
EFAULTS WITH
7
RTS / CTS flow control
Hardware flow control
rupt to be generated
CDC-ACM D
GPIO_MODE)
N
OTES
RIVER
2-CH FULL-SPEED USB UART
XR21V1412