- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄3762 > XR68M752IL32TR-F (Exar Corporation)IC UART FIFO 64B DUAL 32QFN PDF資料下載
參數(shù)資料
| 型號： | XR68M752IL32TR-F |
| 廠商： | Exar Corporation |
| 文件頁數(shù)： | 9/54頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC UART FIFO 64B DUAL 32QFN |
| 標(biāo)準(zhǔn)包裝： | 3,000 |
| 特點(diǎn)： | * |
| 通道數(shù)： | 2，DUART |
| FIFO's： | 64 字節(jié) |
| 規(guī)程： | RS232，RS422，RS485 |
| 電源電壓： | 1.62 V ~ 3.63 V |
| 帶自動流量控制功能： | 是 |
| 帶IrDA 編碼器/解碼器： | 是 |
| 帶故障啟動位檢測功能： | 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： | 32-VFQFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 32-QFN 裸露焊盤（5x5） |
| 包裝： | 帶卷 (TR) |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁當(dāng)前第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁
XR16M752/XR68M752
17
REV. 1.1.1
HIGH PERFORMANCE DUART WITH 64-BYTE FIFO
2.10
Receiver
The receiver section contains an 8-bit Receive Shift Register (RSR) and 64 bytes of FIFO which includes a
byte-wide Receive Holding Register (RHR). The RSR uses the 16X/8X/4X clock (DLD [5:4]) for timing. It
verifies and validates every bit on the incoming character in the middle of each data bit. On the falling edge of
a start or false start bit, an internal receiver counter starts counting at the 16X/8X/4X clock rate. After 8 clocks
(or 4 if 8X or 2 if 4X) the start bit period should be at the center of the start bit. At this time the start bit is
sampled and if it is still a logic 0 it is validated. Evaluating the start bit in this manner prevents the receiver from
assembling a false character. The rest of the data bits and stop bits are sampled and validated in this same
manner to prevent false framing. If there were any error(s), they are reported in the LSR register bits 2-4. Upon
unloading the receive data byte from RHR, the receive FIFO pointer is bumped and the error tags are
immediately updated to reflect the status of the data byte in RHR register. RHR can generate a receive data
ready interrupt upon receiving a character or delay until it reaches the FIFO trigger level. Furthermore, data
delivery to the host is guaranteed by a receive data ready time-out interrupt when data is not received for 4
word lengths as defined by LCR[1:0] plus 12 bits time. This is equivalent to 3.7-4.6 character times. The RHR
interrupt is enabled by IER bit-0.
2.10.1
Receive Holding Register (RHR) - Read-Only
The Receive Holding Register is an 8-bit register that holds a receive data byte from the Receive Shift
Register. It provides the receive data interface to the host processor. The RHR register is part of the receive
FIFO of 64 bytes by 11-bits wide, the 3 extra bits are for the 3 error tags to be reported in LSR register. When
the FIFO is enabled by FCR bit-0, the RHR contains the first data character received by the FIFO. After the
RHR is read, the next character byte is loaded into the RHR and the errors associated with the current data
byte are immediately updated in the LSR bits 2-4.
FIGURE 9. RECEIVER OPERATION IN NON-FIFO MODE
R eceive D ata Shift
R egister (R SR)
Receive
D ata Byte
and Errors
R H R Interrupt (ISR bit-2)
Receive Data
H olding R egister
(R H R)
R XFIFO 1
16X or 8X or 4X C lock
( D LD[5:4] )
R eceive Data Characters
D ata Bit
Validation
Error
Tags in
LSR bits
4:2
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ATMEGA168-15AT | MCU AVR 16K FLASH 15MHZ 32-TQFP |
| ST16C450CQ48TR-F | IC UART SINGLE 48TQFP |
| ST16C450IJ44TR-F | IC UART SINGLE 44PLCC |
| XR16M770IL24-F | IC UART FIFO 64B 24QFN |
| XR16M680IL32-F | IC UART FIFO 32B 32QFN |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XR68M752IM-0B-EB | 功能描述:界面開發(fā)工具 Support XR68M752 48L TQFP, PCI Interface RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類型:RS-485 工具用于評估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V |
| XR68M752IM48 | 制造商:EXAR 制造商全稱:EXAR 功能描述:HIGH PERFORMANCE DUART WITH 64-BYTE FIFO |
| XR68M752IM48-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 |
| XR68M752IM48TR-F | 制造商:Exar Corporation 功能描述:XR68M752 Series 16 Mbps High Performance DUART With 64-Byte FIFO - TQFP-48 |
| XR7090AA-BC-0001 | 制造商:CREE 制造商全稱:Cree, Inc 功能描述:XLamp㈢ XR LED Binning and Labeling |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。