参数资料
型号: ST16C550IJ44-F
厂商: Exar Corporation
文件页数: 8/35页
文件大小: 0K
描述: IC UART FIFO 16B SGL 44PLCC
标准包装: 27
特点: *
通道数: 1,UART
FIFO's: 16 字节
电源电压: 2.97 V ~ 5.5 V
带故障启动位检测功能:
带调制解调器控制功能:
带CMOS:
安装类型: 表面贴装
封装/外壳: 44-LCC(J 形引线)
供应商设备封装: 44-PLCC(16.59x16.59)
包装: 管件
其它名称: 1016-1261
ST16C550
16
Rev. 5.01
Interrupt Status Register (ISR)
The ST16C550 provides four levels of prioritized inter-
rupts to minimize external software interaction. The
Interrupt Status Register (ISR) provides the user with six
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. Whenever
the interrupt status register is read, the interrupt status
is cleared. However it should be noted that only the
current pending interrupt is cleared by the read. A lower
level interrupt may be seen after rereading the interrupt
status bits. The Interrupt Source Table 5 (below) shows
the data values (bit 0-3) for the four prioritized interrupt
levels and the interrupt sources associated with each
of these interrupt levels:
Table 5, INTERRUPT SOURCE TABLE
Priority
[ISR]
Level
Bit-3 Bit-2 Bit-1 Bit-0
Source of the interrupt
X
0001
No interrupt pending
1
0110
LSR (Receiver Line Status Register)
2
0100
RXRDY (Received Data Ready)
2
1100
RXRDY (Receive Data time out)
3
0010
TXRDY ( Transmitter Holding Register Empty)
4
0000
MSR (Modem Status Register)
相关PDF资料
PDF描述
ST16C450IQ48-F IC UART SINGLE 48TQFP
MAX7324AEG+T IC I/O EXPANDER I2C 8B 24QSOP
ATMEGA88-20MUR MCU AVR 8K FLASH 20MHZ 32QFN
XR16M570IL24-F IC UART FIFO 16B 24QFN
MAX7318AWG+ IC PORT EXPANDER 16BIT 24SOIC
相关代理商/技术参数
参数描述
ST16C550IJ44TR-F 功能描述:UART 接口集成电路 UART RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel
ST16C550IP40 功能描述:UART 接口集成电路 SINGLE UART W/16 BYTE FIFO RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel
ST16C550IP40-F 功能描述:UART 接口集成电路 SINGLE UART W/16 BYTE FIFO RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel
ST16C550IQ48 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述:
ST16C550IQ48-F 功能描述:UART 接口集成电路 2.97V-5.5V 16B FIFO temp -45 to 85C;UART RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel