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參數(shù)資料
| 型號： | XR16L651 |
| 廠商： | Exar Corporation |
| 英文描述： | 2.5V, 3.3V and 5V Low Power UART with 32-Byte FIFO(2.5V, 3.3V和5V 低功耗通用異步接收器/發(fā)送器（帶32字節(jié)先進先出）) |
| 中文描述： | 2.5V，3.3V與5V的低功耗的UART與32字節(jié)的FIFO（2.5伏，3.3伏和5V的低功耗通用異步接收器/發(fā)送器（帶32字節(jié)先進先出）） |
| 文件頁數(shù)： | 4/46頁 |
| 文件大?。?/td> | 516K |
| 代理商： | XR16L651 |
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XR16L651
2.5V, 3.3V AND 5V LOW POWER UART WITH 32-BYTE FIFO
REV. P1.0.0
á
PRELIMINARY
4
AS#
24
I
Address Strobe input (active low). In the Intel bus mode, the leading-edge
transition of AS# latches the chip selects (CS0, CS1, CS2#) and the address
lines A0, A1 and A2. This input is used when the address lines and chip
select inputs are not stable for the duration of a read or write operation, i.e.,for
a processor that needs to de-multiplex the address and data lines. If not
required, this input can be permanently tied to GND. This input is not used in
the Motorola mode.
PC Mode Interface Signals. Connect PCMODE# pin to GND and IM# pin to GND to select PC Mode.
A3, A4, A5,
A6, A7, A8, A9
20, 6, 9,
10,11,17,38
I
In the PC mode, these are the addtional address lines from the host address
bus. They are inputs to the on-board chip select decode function for COM 1-4
and LPT ports. See Table 1 for details. The pins A4 and A9 have internal
100k
pull-up resistors.
AEN#
24
I
Address Enable input (active low). When AEN# transition to logic 0, it
decodes and validates COM 1-4 ports address per S1, S2 and S3 inputs.
S1, S2, S3
21,5,31
I
Select 1 to 3. These are the standard PC COM 1-4 ports and IRQ selection
inputs. See Table 1 and Table 2 for details. The S1 pin has an internal 100k
pull-up resistor.
IRQA, IRQB,
IRQC
30,29,23
O
Interrupt Request A, B and C Outputs (active high, tri-state). These are the
interrupt outputs associated with COM 1-4 to be connected to the host data
bus. See interrupt section for details. The Interrupt Requests A, B or C func-
tions as IRQx to the PC bus. IRQx is enabled by setting MCR bit-3 to logic 1
and the desired interrupt(s) in the interrupt enable register (IER).
LPT1#
12
O
Line Printer Port-1 Decode Logic Output (active low). This pin functions as the
PC standard LPT-1 printer port address decode logic output, see Table 1.
The baud rate generator clock output, BAUDOUT#, is internally connected to
the RCLK input in the PC mode.
LPT2#
22
O
Line Printer Port-2 Decode Logic Output (active low) - This pin functions as
the PC standard LPT-2 printer port address decode logic output, see Table 1.
MODEM OR SERIAL I/O INTERFACE
TX
8
O
Transmit Data or wireless infrared transmit data. This output is active low in
normal standard serial interface operation (RS-232, RS-422 or RS-485) and
active high in the infrared mode. Infrared mode can be enabled by connecting
pin ENIR to VCC or through software settling after power up.
RX
7
I
Receive Data or wireless infrared receive data. Normal received data input
idles at logic 1 condition and logic 0 in the infrared mode. The wireless infra-
red pulses are applied to the decoder. This input must be connected to its idle
logic state in either normal, logic 1, or infrared mode, logic 0, else the receiver
may report “receive break” and/or “error” condition(s).
RTS#
32
O
Request to Send or general purpose output (active low). This port may be
used for one of two functions:
1) automatic hardware flow control, see EFR bit-6, MCR bits-1 & 2, FCTR bits
0-3 and IER bit-6.
2) RS485 half-duplex direction control, see FCTR bit-5, MCR bit-2 and MSR
bits 4-7.
RTS# output must be asserted before auto RTS flow control can start.
N
AME
P
IN
#
T
YPE
D
ESCRIPTION
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相關代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XR16L651CM | 制造商:EXAR 制造商全稱:EXAR 功能描述:2.25V TO 5.5V UART WITH 32-BYTE FIFO |
| XR16L651CM-0A-EVB | 功能描述:UART 接口集成電路 Supports L651 48 ld TQFP, 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 |
| XR16L651CM-F | 功能描述:UART 接口集成電路 UARTW/32BYTEFIFO 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 |
| XR16L651CMTR-F | 制造商:Exar Corporation 功能描述:UART 1-CH 32Byte FIFO 2.5V/3.3V/5V 48-Pin TQFP T/R 制造商:Exar Corporation 功能描述:XR16L651CMTR-F |
| XR16L651IM | 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述: |
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