參數(shù)資料
型號(hào)： XR17D158
廠商： Exar Corporation
英文描述： UNIVERSAL (3.3V AND 5V) PCI BUS OCTAL UART
中文描述： 通用（3.3V和5V）PCI總線八進(jìn)制的UART
文件頁(yè)數(shù)： 46/72頁(yè)
文件大?。?/td> 1520K
代理商： XR17D158
XR17D158
UNIVERSAL (3.3V AND 5V) PCI BUS OCTAL UART
xr
REV. 1.2.1
46
LCR[6]: Transmit Break Enable
When enabled the Break control bit causes a break condition to be transmitted (the TX output is forced to a
“space", LOW state). This condition remains until disabled by setting LCR bit-6 to a logic 0.
Logic 0 = No TX break condition (default).
Logic 1 = Forces the transmitter output (TX) to a “space”, LOW, for alerting the remote receiver of a line
break condition.
LCR[7]: Baud Rate Divisors Enable
Baud rate generator divisor (DLL/DLM) enable.
Logic 0 = Data registers are selected (default).
Logic 1 = Divisor latch registers are selected.
5.8.8
The MCR register is used for controlling the modem interface signals or general purpose inputs/outputs.
MCR[0]: DTR# Pins
The DTR# pin may be used for automatic hardware flow control enabled by EFR bit-6 and MCR bit-2=1. If the
modem interface is not used, this output may be used for general purpose.
Logic 0 = Force DTR# output HIGH (default).
Logic 1 = Force DTR# output LOW.
Modem Control Register (MCR) - Read/Write
MCR[1]: RTS# Pins
The RTS# pin may be used for automatic hardware flow control by enabled by EFR bit-6 and MCR bit-2=0. If
the modem interface is not used, this output may be used for general purpose.
Logic 0 = Force RTS# output HIGH (default).
Logic 1 = Force RTS# output LOW.
MCR[2]: DTR# or RTS# for Auto Flow Control
DTR# or RTS# auto hardware flow control select. This bit is in effect only when auto RTS/DTR is enabled by
EFR bit-6. DTR# selection is associated with DSR# and RTS# is with CTS#.
Logic 0 = Uses RTS# and CTS# pins for auto hardware flow control.
Logic 1 = Uses DTR# and DSR# pins for auto hardware flow control.
MCR[3]: (OP2)
The OP2 output is not available in the XR17D158. It is present for 16C550 compatibility during internal
loopback. See
Figure 18
. Logic 0 is default.
MCR[4]: Internal Loopback Enable
Logic 0 = Disable internal loopback mode (default).
Logic 1 = Enable internal loopback mode, see loopback section and
Figure 18
.
T
ABLE
16: P
ARITY
SELECTION
LCR B
IT
-5 LCR B
IT
-4 LCR B
IT
-3
P
ARITY
SELECTION
X
X
0
No parity
0
0
1
Odd parity
0
1
1
Even parity
1
0
1
Force parity to mark, “1”
1
1
1
Forced parity to space, “0”
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XR17D158_05 制造商:EXAR 制造商全稱:EXAR 功能描述:UNIVERSAL (3.3V AND 5V) PCI BUS OCTAL UART
XR17D158CV 功能描述:UART 接口集成電路 UART RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel
XR17D158CV-0A-EVB 功能描述:界面開(kāi)發(fā)工具 Supports D158 144 ld TQFP, PCI Interface RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類型:RS-485 工具用于評(píng)估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V
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XR17D158CV-F-SIWI 制造商:Exar Corporation 功能描述:FOR WILLIAMS GAMING THEIR CM'S 制造商:EXAR 功能描述:XR17D158CV-F-SIWI 制造商:EXAR 功能描述:FOR WILLIAMS GAMING THEIR CM'S
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