REV. 1.2.1 20 3.0 UART INTERNAL REGISTERS Each of the UART channel in the 2750 has its own s" />
參數(shù)資料
型號(hào): XR16L2750CMTR-F
廠商: Exar Corporation
文件頁(yè)數(shù): 13/48頁(yè)
文件大?。?/td> 0K
描述: IC UART FIFO 64B DUAL 48TQFP
標(biāo)準(zhǔn)包裝: 1,500
特點(diǎn): *
通道數(shù): 2,DUART
FIFO's: 64 字節(jié)
規(guī)程: RS232,RS485
電源電壓: 2.25 V ~ 5.5 V
帶自動(dòng)流量控制功能:
帶IrDA 編碼器/解碼器:
帶故障啟動(dòng)位檢測(cè)功能:
帶調(diào)制解調(diào)器控制功能:
帶CMOS:
安裝類型: 表面貼裝
封裝/外殼: 48-TQFP
供應(yīng)商設(shè)備封裝: 48-TQFP(7x7)
包裝: 帶卷 (TR)
XR16L2750
xr
2.25V TO 5.5V DUART WITH 64-BYTE FIFO
REV. 1.2.1
20
3.0 UART INTERNAL REGISTERS
Each of the UART channel in the 2750 has its own set of configuration registers selected by address lines A0,
A1 and A2 with CSA# or CSB# selecting the channel. The complete register set is shown on Table 7 and
TABLE 7: UART CHANNEL A AND B UART INTERNAL REGISTERS
ADDRESSES
A2 A1 A0
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
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
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
≠ 0xBF
0 1 1
LCR - Line Control Register
Read/Write
1 0 0
MCR - Modem Control Register
Read/Write
LCR
≠ 0xBF
1 0 1
LSR - Line Status Register
Reserved
Read-only
Write-only
1 1 0
MSR - Modem Status Register
Reserved
Read-only
Write-only
1 1 1
SPR - Scratch Pad Register
Read/Write
LCR
≠ 0xBF, FCTR[6] = 0
1 1 1
FLVL - RX/TX FIFO Level Counter Register
Read-only
LCR
≠ 0xBF, FCTR[6] = 1
1 1 1
EMSR - Enhanced Mode Select Register
Write-only
ENHANCED REGISTERS
0 0 0
TRG - RX/TX FIFO Trigger Level Register
FC - RX/TX FIFO Level Counter Register
Write-only
Read-only
LCR = 0xBF
0 0 1
FCTR - Feature Control Register
Read/Write
0 1 0
EFR - Enhanced Function Register
Read/Write
1 0 0
Xon-1 - Xon Character 1
Read/Write
1 0 1
Xon-2 - Xon Character 2
Read/Write
1 1 0
Xoff-1 - Xoff Character 1
Read/Write
1 1 1
Xoff-2 - Xoff Character 2
Read/Write
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