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參數(shù)資料
| 型號(hào)： | XR16M2751IM48-F |
| 廠商： | Exar Corporation |
| 文件頁(yè)數(shù)： | 1/53頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC UART FIFO 64B DUAL 48TQFP |
| 標(biāo)準(zhǔn)包裝： | 250 |
| 特點(diǎn)： | * |
| 通道數(shù)： | 2，DUART |
| FIFO's： | 64 字節(jié) |
| 規(guī)程： | RS232，RS485 |
| 電源電壓： | 1.62 V ~ 3.63 V |
| 帶自動(dòng)流量控制功能： | 是 |
| 帶IrDA 編碼器/解碼器： | 是 |
| 帶故障啟動(dòng)位檢測(cè)功能： | 是 |
| 帶調(diào)制解調(diào)器控制功能： | 是 |
| 帶CMOS： | 是 |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 48-TQFP |
| 供應(yīng)商設(shè)備封裝： | 48-TQFP（7x7） |
| 包裝： | 托盤 |
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Exar Corporation 48720 Kato Road, Fremont CA, 94538 (510) 668-7000 FAX (510) 668-7017 www.exar.com
XR16M2751
1.62V TO 3.63V HIGH PERFORMANCE DUART WITH 64-BYTE FIFO
AUGUST 2007
REV. 1.0.0
GENERAL DESCRIPTION
The XR16M27511 (M2751) is a high performance
dual universal asynchronous receiver and transmitter
(UART) with 64 byte TX and RX FIFOs. The device
operates from 1.62 to 3.63 volts and is pin-to-pin and
software compatible to Exar’s XR16V2751.
The
device includes 2 additional capabilities over the
XR16M2750: Intel and Motorola data bus selection
and a “PowerSave” mode to further reduce sleep
current to a minimum during sleep mode. It supports
the Exar’s enhanced features of programmable FIFO
trigger level and FIFO level counters, automatic
hardware (RTS/CTS) and software flow control,
automatic RS-485 half duplex direction control output
and a complete modem interface. An internal
loopback
capability
allows
system
diagnostics.
Independent programmable fractional baud rate
generators are provided in each channel to select
data rates up to 8 Mbps at 3.3 Volt and 8X sampling
clock. The M2751 is available in a 48-pin TQFP
package.
NOTE: 1 Covered by U.S. Patent #5,649,122 and #5,949,787
APPLICATIONS
Portable Appliances
Telecommunication Network Routers
Ethernet Network Routers
Cellular Data Devices
Factory Automation and Process Controls
FEATURES
1.62 to 3.63 Volt Operation
Pin-to-pin compatible to Exar’s XR16V2751 in the
48-TQFP package
Two independent UART channels
■ Data rate of up to 8 Mbps at 3.3 V
■ Data rate of up to 6.25 Mbps at 2.5 V
■ Data rate of up to 4 Mbps at 1.8 V
■ Fractional Baud Rate Generator
■ Transmit and Receive FIFOs of 64 bytes
■ Programmable TX and RX FIFO Trigger Levels
■ Transmit and Receive FIFO Level Counters
■ Automatic Hardware (RTS/CTS) Flow Control
■ Selectable Auto RTS Flow Control Hysteresis
■ Automatic Software (Xon/Xoff) Flow Control
■ Automatic
RS-485
Half-duplex
Direction
Control Output via RTS#
■ Wireless Infrared (IrDA 1.0) Encoder/Decoder
■ Automatic sleep mode with wake-up interrupt
■ Full modem interface
PowerSave Feature reduces sleep current to 15 A
Device Identification and Revision
Crystal oscillator (up to 24MHz) or external clock
(up to 64MHz) input
48-TQFP package
FIGURE 1. XR16M2751 BLOCK DIAGRAM
XTAL1
XTAL2
Crystal Osc/Buffer
TXA, RXA, DTRA#,
DSRA#, RTSA#,
DTSA#, CDA#, RIA#,
OP2A#
Intel or
Motorola
Data Bus
Interface
UART Channel A
64 Byte TX FIFO
64 Byte RX FIFO
BRG
IR
ENDEC
TX & RX
UART
Regs
1.62 to 3.6V VCC
GND
TXB, RXB, DTRB#,
DSRB#, RTSB#,
CTSB#, CDB#, RIB#,
OP2B#
UART Channel B
(same as Channel A)
A2:A0
D7:D0
CSA# (CS#)
16/68#
CSB# (A3)
INTA (IRQ#)
INTB (logic 0)
PwrSave
IOW# (R/W#)
IOR# (VCC)
Reset (Reset#)
CLKSEL
HDCNTL#
TXRDYA#
TXRDYB#
RXRDYA#
RXRDYB#
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| XR16M2752 | 制造商:EXAR 制造商全稱:EXAR 功能描述:1.62V TO 3.63V HIGH PERFORMANCE DUART WITH 64-BYTE FIFO |
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