- 您現(xiàn)在的位置：買賣IC網 > PDF目錄11833 > XR16C850CJ-F (Exar Corporation)IC UART FIFO 128B 44PLCC PDF資料下載
參數資料
| 型號： | XR16C850CJ-F |
| 廠商： | Exar Corporation |
| 文件頁數： | 4/56頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC UART FIFO 128B 44PLCC |
| 標準包裝： | 27 |
| 特點： | * |
| 通道數： | 1，UART |
| FIFO's： | 128 字節(jié) |
| 規(guī)程： | RS485 |
| 電源電壓： | 2.97 V ~ 5.5 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 |
| 帶調制解調器控制功能： | 是 |
| 帶CMOS： | 是 |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 44-LCC（J 形引線） |
| 供應商設備封裝： | 44-PLCC（16.59x16.59） |
| 包裝： | 管件 |
第1頁第2頁第3頁當前第4頁第5頁第6頁第7頁第8頁第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頁第55頁第56頁
XR16C850
xr
2.97V TO 5.5V UART WITH 128-BYTE FIFO
REV. 2.3.1
12
2.7
Internal Registers
The 850 has a set of enhanced registers for controlling, monitoring and data loading and unloading. The
configuration register set is compatible to those already available in the standard 16C550. These registers
function as data holding registers (THR/RHR), interrupt status and control registers (ISR/IER), a FIFO control
register (FCR), receive line status and control registers (LSR/LCR), modem status and control registers (MSR/
MCR), programmable data rate (clock) divisor registers (DLL/DLM), and a user accessible scractchpad register
(SPR).
Beyond the general 16C550 features and capabilities, the 850 offers enhanced feature registers (EMSR, TRG,
FC, FCTR, EFR, Xon/Xoff 1, Xon/Xoff 2) that provide automatic RTS and CTS hardware flow control, Xon/Xoff
software flow control, automatic RS-485 half-duplex direction output enable/disable, FIFO trigger level control,
and FIFO level counters. All the register functions are discussed in full detail later in “Section 3.0, UART
2.8
DMA Mode
The DMA Mode (a legacy term) in this document does not mean “Direct Memory Access” but refers to data
block transfer operation. The DMA mode affects the state of the RXRDY# A/B and TXRDY# A/B output pins.
The transmit and receive FIFO trigger levels provide additional flexibility to the user for block mode operation.
The LSR bits 5-6 provide an indication when the transmitter is empty or has an empty location(s) for more data.
The user can optionally operate the transmit and receive FIFO in the DMA mode (FCR bit-3=1). When the
transmit and receive FIFO are enabled and the DMA mode is disabled (FCR bit-3 = 0), the 850 activates the
interrupt output pin for each data transmit or receive operation. When DMA mode is enabled (FCR bit-3 = 1),
the user takes advantage of block mode operation by loading or unloading the FIFO in a block sequence
determined by the programmed trigger level. In this mode, the 850 sets the TXRDY# pin when the transmit
FIFO becomes full, and sets the RXRDY# pin when the receive FIFO becomes empty. The following table
shows their behavior.
TABLE 2: TXRDY# AND RXRDY# OUTPUTS IN FIFO AND DMA MODE
PINS
FCR BIT-0=0
(FIFO DISABLED)
FCR BIT-0=1 (FIFO ENABLED)
FCR Bit-3 = 0
(DMA Mode Disabled)
FCR Bit-3 = 1
(DMA Mode Enabled)
RXRDY# A/B
0 = 1 byte.
1 = no data.
0 = at least 1 byte in FIFO
1 = FIFO empty.
1 to 0 transition when FIFO reaches the trigger
level, or timeout occurs.
0 to 1 transition when FIFO empties.
TXRDY# A/B
0 = THR empty.
1 = byte in THR.
0 = FIFO empty.
1 = at least 1 byte in FIFO.
0 = FIFO has at least 1 empty location.
1 = FIFO is full.
相關PDF資料 |
PDF描述 |
|---|---|
| MS3116F16-23P | CONN PLUG 23POS STRAIGHT W/PINS |
| XR16C2852CJTR-F | IC UART FIFO 128B 44PLCC |
| D38999/20FB5SA | CONN RCPT 5POS WALL MNT W/SCKT |
| XR16C2850CJTR-F | IC UART FIFO 128B 44PLCC |
| XR68C192IJ-F | IC UART FIFI DUAL 44PLCC |
相關代理商/技術參數 |
參數描述 |
|---|---|
| XR16C850CJTR-F | 制造商:Exar Corporation 功能描述:UART 1-CH 128Byte FIFO 3.3V/5V 44-Pin PLCC T/R 制造商:Exar Corporation 功能描述:XR16C850CJTR-F |
| XR16C850CM | 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述: |
| XR16C850CM-0A-EVB | 功能描述:UART 接口集成電路 Supports C850 48 ld TQFP, ISA Interface RoHS:否 制造商:Texas Instruments 通道數量:2 數據速率: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 |
| XR16C850CM-F | 功能描述:UART 接口集成電路 UARTW/128BYTE FIFO RoHS:否 制造商:Texas Instruments 通道數量:2 數據速率: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 |
| XR16C850CMTR-F | 功能描述:UART 接口集成電路 UART w/128 Bytes FIFO & IrDA RoHS:否 制造商:Texas Instruments 通道數量:2 數據速率: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 |
發(fā)布緊急采購，3分鐘左右您將得到回復。