XR21V1412IL-0A Datasheet, PDF (17/32 Pages) Exar Corporation – 2-CH FULL-SPEED USB UART

REV. 1.3.0
3.2 UART Register Map
ADDRESS
REGISTER NAME
0X00 Reserved
0X01 Reserved
0X02 Reserved
0X03 UART_ENABLE
0X04 CLOCK_DIVISOR0
0x05 CLOCK_DIVISOR1
0x06 CLOCK_DIVISOR2
0x07 TX_CLOCK_MASK0
0x08 TX_CLOCK_MASK1
0x09 RX_CLOCK_MASK0
0x0A RX_CLOCK_MASK1
0x0B CHARACTER_FORMAT
0x0C FLOW_CONTROL
0x0D Reserved
0x0E Reserved
0x0F Reserved
0x10 XON_CHAR
0x11 XOFF_CHAR
0x12 LOOPBACK_CTL
0x13 ERROR_STATUS
0x14 TX_BREAK
0x15 RS485_DELAY
0x16 Reserved
0x17 Reserved
0x18 Reserved
0x19 Reserved
0x1A GPIO_MODE
0x1B GPIO_DIRECTION
0x1C GPIO_INT_MASK
0x1D GPIO_SET
0x1E GPIO_CLEAR
0x1F GPIO_STATUS
XR21V1412
2-CH FULL-SPEED USB UART
TABLE 7: UART REGISTERS
BIT-7
0
0
0
0
Bit-7
Bit-15
0
Bit-7
Bit-15
Bit-7
Bit-15
Stop
0
0
0
0
Bit-7
Bit-7
0
Break
Status
Bit-7
0
0
0
0
0
0
0
0
0
0
0
BIT-6
0
0
0
0
Bit-6
Bit-14
0
Bit-6
Bit-14
Bit-6
Bit-14
0
0
0
0
Bit-6
Bit-6
0
Overrun
Error
Bit-6
0
0
0
0
0
0
0
0
0
0
0
BIT-5
0
0
0
0
Bit-5
Bit-13
0
Bit-5
Bit-13
Bit-5
Bit-13
Parity
0
0
0
0
Bit-5
Bit-5
0
Parity
Error
Bit-5
0
0
0
0
0
0
GPIO5
GPIO5
GPIO5
GPIO5
GPIO5
BIT-4
0
0
0
0
Bit-4
Bit-12
0
Bit-4
Bit-12
Bit-4
Bit-12
BIT-3
0
0
0
0
Bit-3
Bit-11
0
Bit-3
Bit-11
Bit-3
Bit-11
0
Half-
Duplex
0
0
0
0
0
0
Bit-4
Bit-3
Bit-4
Bit-3
0
0
Framing Break
Error
Error
Bit-4
Bit-3
0
0
0
0
0
0
0
0
0
0
RS485
Polarity
GPIO4 GPIO3
GPIO4 GPIO3
GPIO4 GPIO3
GPIO4 GPIO3
GPIO4 GPIO3
BIT-2
BIT-1
0
0
0
0
0
0
0
RX
Bit-2
Bit-1
Bit-10
Bit-9
Bit-18 Bit-17
Bit-2
Bit-1
Bit-10
Bit-9
Bit-2
Bit-1
Bit-10
Bit-9
Data Bits
BIT-0
0
0
0
TX
Bit-0
Bit-8
Bit-16
Bit-0
Bit-8
Bit-0
Bit-8
Flow Control Mode Select
0
0
0
Bit-2
Bit-2
En
0
0
0
Bit-1
Bit-1
0
0
0
0
Bit-0
Bit-0
Chan
0
0
0
Bit-2
Bit-1
Delay
0
0
0
0
0
0
0
0
Bit-0
0
0
0
0
Mode Select
GPIO2
GPIO2
GPIO2
GPIO2
GPIO2
GPIO1
GPIO1
GPIO1
GPIO1
GPIO1
GPIO0
GPIO0
GPIO0
GPIO0
GPIO0
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