參數(shù)資料
型號(hào): XR17C154
廠(chǎng)商: Exar Corporation
英文描述: Tip, Offset Tapered Needle, 1mm Diameter
中文描述: 四5V的PCI總線(xiàn)的UART
文件頁(yè)數(shù): 31/62頁(yè)
文件大?。?/td> 721K
代理商: XR17C154
á
REV. 1.3.0
XR17C154
5V PCI BUS QUAD UART
31
4.6
Each UART channel provides an internal loopback capability for system diagnostic. The internal loopback
mode is enabled by setting MCR register bit-4 to logic 1. All regular UART functions operate normally.
Figure 16
shows how the modem port signals are re-configured. Transmit data from the transmit shift register
output is internally routed to the receive shift register input allowing the system to receive the same data that it
was sending. The TX, RTS# and DTR# pins are held HIGH (idle or de-asserted state), and the CTS#, DSR#
CD# and RI# inputs are ignored.
Internal Loopback
4.7
The 4 sets of UART configuration registers are decoded using address lines A8 to A11 as show below. Ad-
dress lines A0 to A3 select the 16 registers in each channel. The first 8 registers are 16550 compatible with
EXAR enhanced feature registers located on the upper 8 addresses.
UART CHANNEL CONFIGURATION REGISTERS AND ADDRESS DECODING
F
IGURE
16. I
NTERNAL
L
OOP
B
ACK
A11
A10
A9
A8
UART
C
HANNEL
S
ELECTION
0
0
0
0
0
0
1
1
0
1
0
1
0
0
0
0
0
1
2
3
TX [3:0]
RX [3:0]
M
L
I
RTS# [3:0]
MCR bit-4=1
VCC
VCC
VCC
Transmit Shift
Register
Receive Shift
Register
CTS# [3:0]
DTR# [3:0]
DSR# [3:0]
RI# [3:0]
CD# [3:0]
OP1#
OP2#
RTS#
CTS#
DTR#
DSR#
RI#
CD#
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XR17C154_05 制造商:EXAR 制造商全稱(chēng):EXAR 功能描述:5V PCI BUS QUAD UART
XR17C154CV 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
XR17C154CV-0A-EVB 功能描述:UART 接口集成電路 Supports C154 144 ld TQFP, PCI Interface 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
XR17C154CV-F 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
XR17C154CVTR-F 制造商:Exar Corporation 功能描述:UART 4-CH 64Byte FIFO 5V 144-Pin LQFP T/R 制造商:Exar Corporation 功能描述:XR17C154CVTR-F