參數(shù)資料
型號： XR17C158
廠商： Exar Corporation
英文描述： PCI Bus Octal UART(八通用異步接收器/發(fā)送器（滿足通訊系統(tǒng)中PCI總線和高帶寬要求）)
中文描述： PCI總線八路的UART（八通用異步接收器/發(fā)送器（滿足通訊系統(tǒng)中的PCI總線和高帶寬要求））
文件頁數(shù)： 39/51頁
文件大?。?/td> 685K
代理商： XR17C158
XR17C158
PCI BUS OCTAL UART
PRELIMINARY
REV. 1.0.0
39
FCTR[4]: Infrared RX Input Logic Select
0 = Select RX input as active high encoded IrDA da-
ta, normal, (default).
1 = Select RX input as active low encoded IrDA data,
inverted.
FCTR[5]: Auto RS485 Enable
Auto RS485 half duplex control enable/disable.
0 = Standard ST16C550 mode. Transmitter gener-
ates an interrupt when transmit holding register
(THR) becomes empty. Transmit Shift Register
(TSR) may still be shifting data bit out.
1 = Enable Auto RS485 half duplex direction con-
trol. RTS# output changes its logic level from 1 to 0
when finished sending the last stop bit of the last
character out of the TSR register. It changes back
to logic level 1 from 0 when a data byte is loaded
into the THR or transmit FIFO. The change to logic
1 occurs prior sending the start-bit. It also changes
the transmitter interrupt from transmit holding to
transmit shift register (TSR) empty.
FCTR[7:6]: TX and RX FIFO Trigger Table Select
These 2 bits select the transmit and receive FIFO trig-
ger level table A, B, C or D. When table A, B, or C is
selected the auto RTS flow control trigger level is set
to "next FIFO trigger level" for compatibility to
ST16C550 and ST16C650 series. RTS/DTR# trig-
gers on the next level of the RX FIFO trigger level, in
another word, one FIFO level above and one FIFO
level below. See in
Table 13
for complete selection
with FCR bit 4-5 and FCTR bit 6-7, i.e. if Table C is
used on the receiver with RX FIFO trigger level set to
56 bytes, RTS/DTR# output will de-asserts at 60 and
re-asserts at 16.
Enhanced Feature Register (EFR)
Enhanced features are enabled or disabled using this
register. Bit 0-3 provide single or dual consecutive
character software flow control selection (see
Table 17). When the Xon1 and Xon2 and Xoff1 and
Xoff2 modes are selected, the double 8-bit words are
concatenated into two sequential characters. Cau-
tion: note that whenever changing the TX or RX flow
control bits, always reset all bits back to logic 0 (dis-
able) before programming a new setting.
EFR BIT 0-3: Software Flow Control Select
Combinations of software flow control can be select-
ed by programming these bits.
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
+/- 24
+/- 32
+/- 12
+/- 20
+/- 28
+/- 36
+/- 40
+/- 44
+/- 48
+/- 52
T
ABLE
16: 16 S
ELECTABLE
H
YSTERESIS
L
EVELS
W
HEN
T
RIGGER
T
ABLE
-D
IS
S
ELECTED
FCTR B
IT
-3 FCTR B
IT
-2 FCTR B
IT
-1 FCTR B
IT
-0
RTS/DTR H
YSTERESIS
(
CHARACTERS
)
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XR17C158CV 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
XR17C158CV-0A-EVB 功能描述:UART 接口集成電路 Supports C158 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
XR17C158CV-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
XR17C158CVTR-F 制造商:Exar Corporation 功能描述:UART 8-CH 64Byte FIFO 5V 144-Pin LQFP T/R 制造商:Exar Corporation 功能描述:XR17C158CVTR-F
XR17C158IV 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
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