参数资料
型号: XR20M1172IG28
厂商: Exar Corporation
文件页数: 18/55页
文件大小: 0K
描述: IC UART FIFO I2C/SPI 64B 28TSSOP
产品变化通告: Leaded UART, V&I Obsolescence 11/Apr/2011
标准包装: 50
特点: *
通道数: 2,DUART
FIFO's: 64 字节
规程: RS485
电源电压: 1.62 V ~ 3.63 V
带自动流量控制功能:
带IrDA 编码器/解码器:
带故障启动位检测功能:
带调制解调器控制功能:
带CMOS:
安装类型: 表面贴装
封装/外壳: 28-TSSOP(0.173",4.40mm 宽)
供应商设备封装: 28-TSSOP
包装: 管件
XR20M1172
25
REV. 1.2.0
TWO CHANNEL I2C/SPI UART WITH 64-BYTE FIFO
3.0
UART INTERNAL REGISTERS
The complete register set is shown below in Table 7 and Table 8.
TABLE 7: UART INTERNAL REGISTER ADDRESSES
ADDRESS
REGISTER
READ/WRITE
COMMENTS
16C550 COMPATIBLE REGISTERS
0X00
RHR - Receive Holding Register
THR - Transmit Holding Register
Read-only
Write-only
LCR[7] = 0
0X00
DLL - Divisor LSB
Read/Write
LCR[7] = 1, LCR
≠ 0xBF
0X01
DLM - Divisor MSB
Read/Write
0X02
DLD - Divisor Fractional
Read/Write
LCR[7] = 1, LCR
≠ 0xBF,
EFR[4] = 1
0X01
IER - Interrupt Enable Register
Read/Write
LCR[7] = 0
0X02
ISR - Interrupt Status Register
FCR - FIFO Control Register
Read-only
Write-only
0X03
LCR - Line Control Register
Read/Write
0X04
MCR - Modem Control Register
Read/Write
LCR
≠ 0xBF
0X05
LSR - Line Status Register
Read-only
0X06
MSR - Modem Status Register
Read-only
See
Table 12
0X07
SPR - Scratch Pad Register
Read/Write
See
Table 13
0X06
TCR - Transmission Control Register
Read/Write
See
Table 12
0X07
TLR - Trigger Level Register
Read/Write
See
Table 13
0X08
TXLVL - Transmit FIFO Level
Read-only
LCR[7] = 0
0x09
RXLVL - Receive FIFO Level
Read-only
0x0A
IODir - GPIO Direction Control Register
Read/Write
0x0B
IOState - GPIO State Register
Read/Write
0x0C
IOIntEna - GPIO Interrupt Enable Register
Read/Write
0x0D
Reserved
-
0x0E
IOControl - GPIO Control Register
Read/Write
0x0F
EFCR - Extra Features Control Register
Read/Write
0x02
EFR - Enhanced Function Register
Read/Write
LCR = 0xBF
0x04
Xon-1 - Xon Character 1
Read/Write
0x05
Xon-2 - Xon Character 2
Read/Write
0x06
Xoff-1 - Xoff Character 1
Read/Write
0x07
Xoff-2 - Xoff Character 2
Read/Write
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