参数资料
型号: XR16C854DIV-F
厂商: Exar Corporation
文件页数: 16/53页
文件大小: 0K
描述: IC UART FIFO 128B QUAD 64LQFP
标准包装: 160
特点: *
通道数: 4,QUART
FIFO's: 128 字节
规程: RS232,RS485
电源电压: 2.97 V ~ 5.5 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: 64-LQFP
供应商设备封装: 64-LQFP(10x10)
包装: 托盘
其它名称: 1016-1448
XR16C854DIV-F-ND
XR16C854/854D
23
REV. 3.1.0
2.97V TO 5.5V QUAD UART WITH 128-BYTE FIFO
3.0
UART INTERNAL REGISTERS
Each UART channel in the 854 has its own set of configuration registers selected by address lines A0, A1 and
A2 with a specific channel selected (See Table 1 and Table 2). The complete register set is shown on Table 8
and Table 9.
TABLE 8: UART INTERNAL REGISTERS
A2,A1,A0 ADDRESSES
REGISTER
READ/WRITE
COMMENTS
16C550 COMPATIBLE REGISTERS
0
0 0
RHR - Receive Holding Register
THR - Transmit Holding Register
Read-only
Write-only
LCR[7] = 0
0
0 0
DLL - Div Latch Low Byte
Read/Write
LCR[7] = 1, LCR
≠ 0xBF
0
0 1
DLM - Div Latch High Byte
Read/Write
LCR[7] = 1, LCR
≠ 0xBF
0
0 0
DREV - Device Revision Code
Read-only
DLL, DLM
= 0x00,
LCR[7] = 1, LCR
≠ 0xBF
0
0 1
DVID - Device Identification Code
Read-only
DLL, DLM = 0x00,
LCR[7] = 1, LCR
≠ 0xBF
0
0 1
IER - Interrupt Enable Register
Read/Write
LCR[7] = 0
0
1 0
ISR - Interrupt Status Register
FCR - FIFO Control Register
Read-only
Write-only
LCR[7] = 0
0
1 1
LCR - Line Control Register
Read/Write
1
0 0
MCR - Modem Control Register
Read/Write
LCR[7] = 0
1
0 1
LSR - Line Status Register
Reserved
Read-only
Write-only
LCR[7] = 0
1
1 0
MSR - Modem Status Register
Reserved
Read-only
Write-only
LCR[7] = 0
1
1 1
SPR - Scratch Pad Register
Read/Write
LCR[7] = 0, FCTR[6] = 0
1
1 1
FLVL - TX/RX FIFO Level Counter Register
Read-only
LCR[7] = 0, FCTR[6] = 1
1
1 1
EMSR - Enhanced Mode Select Register
Write-only
LCR[7] = 0, FCTR[6] = 1
ENHANCED REGISTERS
0
0 0
TRG - TX/RX FIFO Trigger Level Reg
FC - TX/RX FIFO Level Counter Register
Write-only
Read-only
LCR = 0xBF
0
0 1
FCTR - Feature Control Reg
Read/Write
LCR = 0xBF
0
1 0
EFR - Enhanced Function Reg
Read/Write
LCR = 0xBF
1
0 0
Xon-1 - Xon Character 1
Read/Write
LCR = 0xBF
1
0 1
Xon-2 - Xon Character 2
Read/Write
LCR = 0xBF
1
1 0
Xoff-1 - Xoff Character 1
Read/Write
LCR = 0xBF
1
1 1
Xoff-2 - Xoff Character 2
Read/Write
LCR = 0xBF
X
X X
FSTAT - FIFO Status Register
Read-only
FSRS# pin is logic 0
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