參數(shù)資料
型號: XR17D152IM
廠商: EXAR CORP
元件分類: 微控制器/微處理器
英文描述: UNIVERSAL (3.3V AND 5V) PCI BUS DUAL UART
中文描述: 2 CHANNEL(S), 6.25M bps, SERIAL COMM CONTROLLER, PQFP100
封裝: 14 X 14 MM, 1 MM HEIGHT, TQFP-100
文件頁數(shù): 34/68頁
文件大?。?/td> 772K
代理商: XR17D152IM
XR17D152
UNIVERSAL (3.3V AND 5V) PCI BUS DUAL UART
á
REV. 1.2.0
34
Address lines A0 to A3 select the 16 registers in each channel. The first 8 registers are 16550 compatible with
the EXAR enhanced feature registers located on next 8 addresses locations. Addresses 0x080 to 0x093
comprise the Device Configuration Registers and they reside in Channel 0’s space.
.
T
ABLE
11: UART CHANNEL CONFIGURATION REGISTERS
A
DDRESS
R
EGISTER
R
EAD
/W
RITE
C
OMMENTS
A3
A2
A1
A0
16550 C
OMPATIBLE
R
EGISTERS
0
0
0
0
RHR - Receive Holding Register
Read-only
LCR[7] = 0
0
0
0
0
THR - Transmit Holding Register
Write-only
LCR[7] = 0
0
0
0
0
DLL - Div Latch Low
Read/Write
LCR[7] = 1
0
0
0
1
DLM - Div Latch High
Read/Write
LCR[7] = 1
0
0
0
1
IER - Interrupt Enable Register
Read/Write
LCR[7] = 0
0
0
1
0
ISR - Interrupt Status Register
Read-only
0
0
1
0
FCR - FIFO Control Register
Write-only
0
0
1
1
LCR - Line Control Register
Read/Write
0
1
0
0
MCR - Modem Control Register
Read/Write
0
1
0
1
LSR - Line Status Register
Read-only
0
1
1
0
MSR - Modem Status Register
Read-only
0
1
1
0
RS485 Turn-Around Delay Register
Write-only
0
1
1
1
SPR - Scratch Pad Register
Read/Write
E
NHANCED
R
EGISTERS
1
0
0
0
FCTR - Feature Control Register
Read/Write
1
0
0
1
EFR - Enhanced Function Register
Read/Write
1
0
1
0
TXCNT - Transmit FIFO Level Counter
Read-only
1
0
1
0
TXTRG - Transmit FIFO Trigger Level
Write-only
1
0
1
1
RXCNT - Receive FIFO Level Counter
Read-only
1
0
1
1
RXTRG - Receive FIFO Trigger Level
Write-only
1
1
0
0
Xoff-1 - Xoff Character 1
Write-only
1
1
0
0
Xchar
Read-only
Xon,Xoff Rcvd. Flags
1
1
0
1
Xoff-2 - Xoff Character 2
Write-only
1
1
1
0
Xon-1 - Xon Character 1
Write-only
1
1
1
1
Xon-2 - Xon Character 2
Write-only
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