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參數(shù)資料
| 型號： | XR16C2852 |
| 廠商： | Exar Corporation |
| 英文描述： | 3.3V AND 5V DUART WITH 128-BYTE FIFO |
| 中文描述： | 3.3V和5V杜阿爾特128字節(jié)FIFO |
| 文件頁數(shù)： | 29/42頁 |
| 文件大?。?/td> | 574K |
| 代理商： | XR16C2852 |
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XR16C2852
REV. 2.0.0
3.3V AND 5V DUART WITH 128-BYTE FIFO
á
29
FCTR[3]: Auto RS-485 Direction Control
Logic 0 = Standard ST16C550 mode. Transmitter
generates an interrupt when transmit holding regis-
ter becomes empty and transmit shift register is
shifting data out.
Logic 1 = Enable Auto RS485 Direction Control
function. The direction control signal, RTS# pin,
changes its output logic state from low to high one
bit time after the last stop bit of the last character is
shifted out. Also, the Transmit interrupt generation
is delayed until the transmitter shift register
becomes empty. The RTS# output pin will automat-
ically return to a logic low when a data byte is
loaded into the TX FIFO.
FCTR[5:4]: Transmit/Receive Trigger Table Select
See Table 10 on page 24.
FCTR[6]: Scratchpad Swap
Logic 0 = Scratch Pad register is selected as gen-
eral read and write register. ST16C550 compatible
mode.
Logic 1 = FIFO Count register (Read-Only),
Enhanced Mode Select Register (Write-Only).
Number of characters in transmit or receive FIFO
can be read via scratch pad register when this bit is
set. Enhanced Mode Select Register is selected
when it is written into.
FCTR[7]: Programmable Trigger Register Select
Logic 0 = Registers TRG and FC selected for RX.
Logic 1 = Registers TRG and FC selected for TX.
4.21 E
NHANCED
F
EATURE
R
EGISTER
(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 15). 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[3:0]: Software Flow Control Select
Single character and dual sequential characters soft-
ware flow control is supported. Combinations of soft-
ware flow control can be selected by programming
these bits.
T
ABLE
14: T
RIGGER
T
ABLE
S
ELECT
FCTR
B
IT
-5
FCTR
B
IT
-4
T
ABLE
0
0
Table-A (TX/RX)
0
1
Table-B (TX/RX)
1
0
Table-C (TX/RX)
1
1
Table-D (TX/RX)
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相關代理商/技術參數(shù) |
參數(shù)描述 |
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| XR16C2852_05 | 制造商:EXAR 制造商全稱:EXAR 功能描述:2.97V TO 5.5V DUAL UART WITH 128-BYTE FIFOS |
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| XR16C2852CJ-0A-EB | 功能描述:UART 接口集成電路 Supports C2852 44 ld PLCC, ISA 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 |
| XR16C2852CJ-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 |
| XR16C2852CJTR-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 |
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