- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄384931 > ST16C2550 (Exar Corporation) Dual UART with 16-Byte of Transmit and Receive FIFO(雙通用異步接收器/發(fā)送器（帶16字節(jié)接收和發(fā)送先進(jìn)先出）) PDF資料下載
參數(shù)資料
| 型號(hào)： | ST16C2550 |
| 廠商： | Exar Corporation |
| 英文描述： | Dual UART with 16-Byte of Transmit and Receive FIFO(雙通用異步接收器/發(fā)送器（帶16字節(jié)接收和發(fā)送先進(jìn)先出）) |
| 中文描述： | 雙UART具有16的發(fā)送和接收FIFO（雙通用異步接收器/發(fā)送器（帶16字節(jié)接收和發(fā)送先進(jìn)先出字節(jié)）） |
| 文件頁數(shù)： | 17/34頁 |
| 文件大小： | 314K |
| 代理商： | ST16C2550 |
第1頁第2頁第3頁第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頁當(dāng)前第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
ST16C2550
17
Rev. 3.40
0) and when there are no characters in the transmit FIFO
or transmit holding register, the -TXRDY pin in 44/48 pin
packages will be a logic 0. Once active the -TXRDY pin
will go to a logic 1 after the first character is loaded into
the transmit holding register.
Receive operation in mode “0”:
When the 2550 is in mode “0” (FCR bit-0 = logic 0) or
in the FIFO mode (FCR bit-0 = logic 1, FCR bit-3 =
logic 0) and there is at least one character in the
receive FIFO, the -RXRDY pin will be a logic 0. Once
active the -RXRDY pin on 44/48 pin packages will go to
a logic 1 when there are no more characters in the
receiver.
Transmit operation in mode “1”:
When the 2550 is in FIFO mode ( FCR bit-0 = logic 1,
FCR bit-3 = logic 1 ), the -TXRDY pin on 44/48 pin
packages will be a logic 1 when the transmit FIFO is
completely full. It will be a logic 0 if one or more FIFO
locations are empty.
Receive operation in mode “1”:
When the 2550 is in FIFO mode (FCR bit-0 = logic 1,
FCR bit-3 = logic 1) and the trigger level has been
reached, or a Receive Time Out has occurred, the -
RXRDY pin on 44/48 pin packages will go to a logic 0.
Once activated, it will go to a logic 1 after there are no
more characters in the FIFO.
FCR BIT 4-5:
Not Used - initialized to a logic 0.
FCR BIT 6-7: (logic 0 or cleared is the default condi-
tion, RX trigger level = 1)
These bits are used to set the trigger level for the
receive FIFO interrupt.
An interrupt is generated when the number of charac-
ters in the FIFO equals the programmed trigger level.
However the FIFO will continue to be loaded until it is
full.
BIT-7
BIT-6
RX FIFO trigger level
0
0
1
1
0
1
0
1
01
04
08
14
Interrupt Status Register (ISR)
The 2550 provides four levels of prioritized interrupts
to minimize external software interaction. The Inter-
rupt Status Register (ISR) provides the user with four
interrupt status bits. Performing a read cycle on the ISR
will provide the user with the highest pending interrupt
level to be serviced. No other interrupts are acknowl-
edged until the pending interrupt is serviced. A lower
level interrupt may be seen after servicing the higher
level interrupt and rereading the interrupt status bits.
The Interrupt Source Table 6 (below) shows the data
values (bits 0-3) for the four prioritized interrupt levels
and the interrupt sources associated with each of these
interrupt levels:
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ST16C2552 | Dual UART with 16-Byte Transmit and Receive FIFO(雙通用異步接收器/發(fā)送器（帶16字節(jié)接收和發(fā)送先進(jìn)先出）) |
| ST16C450 | UNIVERSAL ASYNCHRONOUS RECEIVER/TRANSMITTER (UART) |
| ST16C450CJ44 | UNIVERSAL ASYNCHRONOUS RECEIVER/TRANSMITTER (UART) |
| ST16C450CP40 | UNIVERSAL ASYNCHRONOUS RECEIVER/TRANSMITTER (UART) |
| ST16C450CQ48 | UNIVERSAL ASYNCHRONOUS RECEIVER/TRANSMITTER (UART) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ST16C2550_04 | 制造商:EXAR 制造商全稱:EXAR 功能描述:2.97V TO 5.5V DUART WITH 16-BYTE FIFO |
| ST16C2550CJ-0A-EB | 功能描述:界面開發(fā)工具 Supports C2550 44 ld PLCC, ISA Interface RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類型:RS-485 工具用于評(píng)估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V |
| ST16C2550CJ44 | 制造商:EXAR 制造商全稱:EXAR 功能描述:2.97V TO 5.5V DUART WITH 16-BYTE FIFO |
| ST16C2550CJ44-F | 功能描述:UART 接口集成電路 2.97V-5.5V 16B FIFO temp 0C to 70C; 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 |
| ST16C2550CJ44TR-F | 功能描述:UART 接口集成電路 DUAL UART W/16BYTE FIFO 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 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。