XR21V1412IL-0B-EB Exar Corporation, XR21V1412IL-0B-EB Datasheet - Page 15

• Manufacturer Part Number: XR21V1412IL-0B-EB
• Description: Interface Modules & Development Tools For XR21V1412 QFN32 USB, RS232;No Cables
• Manufacturer: Exar Corporation
• Series: -r

Specifications of XR21V1412IL-0B-EB

• Interface Type: RS-232, USB
• Operating Supply Voltage: 3.3 V
• Product: Interface Modules
• Silicon Core Number: XR21V1412
• Application Sub Type: UART
• Kit Contents: Board
• Main Purpose: Interface, USB 2.0 to UART
• Embedded: No
• Utilized Ic / Part: XR21V1412IL
• Primary Attributes: -
• Secondary Attributes: -
• Silicon Manufacturer: Exar
• Kit Application Type: Communication & Networking
• For Use With/related Products: XR21V1412
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

REV. 1.1.0
The internal register set of the V1412 consists of 3 different blocks of registers: the UART Manager, UART
registers and UART miscellaneous registers. The UART Manager controls the TX and RX enables and FIFOs
of all UART channels. The UART registers configure and control the remaining UART channel functionality
with the exception of low latency mode, wide mode and custom interrupt packet enables in the UART custom
register block.
Registers are accessed only via the USB interface by the XR_SET_REG and XR_GET_REG commands listed
in
are given in
Enables the RX FIFO and TX FIFOs. For proper functionality, the UART TX and RX must be enabled in the
following order:
Writing a non-zero value to these registers resets the FIFOs.
A
3.0 REGISTER SET DESCRIPTION
3.1
3.1.1
3.1.2
DDRESS
0X10
0X18
0X19
0x1C
0x1D
0X11
Table
UART Manager Registers
FIFO_ENABLE_CHx = 0x1
UART_ENABLE = 0x3
FIFO_ENABLE_CHx = 0x3
4. The register address offsets are given in
FIFO_ENABLE_CHA
FIFO_ENABLE_CHB
RX_FIFO_RESET_CHA
RX_FIFO_RESET_CHB
TX_FIFO_RESET_CHA
TX_FIFO_RESET_CHB
FIFO_ENABLE Registers
RX_FIFO_RESET and TX_FIFO_RESET Registers
Table
R
EGISTER
5.
N
AME
B
Bit-7
Bit-7
Bit-7
Bit-7
T
IT
ABLE
0
0
-7
// Enable TX FIFO
// Enable TX and RX of that channel
// Enable RX FIFO
6: UART M
B
Bit-6
Bit-6
Bit-6
Bit-6
IT
0
0
-6
15
Table
ANAGER
B
Bit-5
Bit-5
Bit-5
Bit-5
IT
0
0
-5
6,
R
Table 7
EGISTERS
B
Bit-4
Bit-4
Bit-4
Bit-4
IT
0
0
-4
and
B
Bit-3
Bit-3
Bit-3
Bit-3
IT
0
0
Table
2-CH FULL-SPEED USB UART
-3
15, and the register blocks
B
Bit-2
Bit-2
Bit-2
Bit-2
IT
0
0
-2
XR21V1412
B
Bit-1
Bit-1
Bit-1
Bit-1
RX
RX
IT
-1
B
Bit-0
Bit-0
Bit-0
Bit-0
TX
TX
IT
-0