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参数资料
型号： XR16V2750IL-0B-EB
厂商： Exar Corporation
文件页数： 15/52页
文件大小： 0K
描述： EVAL BOARD FOR V2750 32QFN
标准包装： 1
系列： *
XR16V2750
22
HIGH PERFORMANCE DUART WITH 64-BYTE FIFO
REV. 1.0.3
3.0
UART INTERNAL REGISTERS
Each of the UART channel in the V2750 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 8.
TABLE 7: 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 - Divisor LSB
Read/Write
LCR[7] = 1, LCR
≠ 0xBF
0
0 1
DLM - Divisor MSB
Read/Write
0
1 0
DLD - Divisor Fractional
Read/Write
LCR[7] = 1, LCR
≠ 0xBF,
EFR[4] = 1
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
Read-only
1
1 0
MSR - Modem Status Register
Read-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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