参数资料
型号: SC16C750BIB64,151
厂商: NXP Semiconductors
文件页数: 13/44页
文件大小: 0K
描述: IC UART SINGLE W/FIFO 64-LQFP
产品培训模块: Stand-Alone UARTs
标准包装: 160
通道数: 1,UART
FIFO's: 64 字节
电源电压: 2.5V,3.3V,5V
带自动流量控制功能:
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: 64-LQFP
供应商设备封装: 64-LQFP(10x10)
包装: 托盘
产品目录页面: 828 (CN2011-ZH PDF)
其它名称: 568-3284
935274403151
SC16C750BIB64-S
SC16C750B_5
NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 05 — 17 October 2008
20 of 44
NXP Semiconductors
SC16C750B
5 V, 3.3 V and 2.5 V UART with 64-byte FIFOs
7.4 Interrupt Status Register (ISR)
The SC16C750B provides four levels of prioritized interrupts to minimize external software
interaction. The Interrupt 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 acknowledged 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 re-reading the interrupt status bits.
Table 12 “Interrupt source” shows the data values (bit 0 to bit 4) for the four prioritized
interrupt levels and the interrupt sources associated with each of these interrupt levels.
Table 12.
Interrupt source
Priority
level
ISR[3]
ISR[2]
ISR[1]
ISR[0]
Source of the interrupt
1
0
1
0
LSR (Receiver Line Status Register)
2
0
1
0
RXRDY (Received Data Ready)
2
1
0
RXRDY (Receive Data time-out)
3
0
1
0
TXRDY (Transmitter Holding Register Empty)
4
0
MSR (Modem Status Register)
Table 13.
Interrupt Status Register bits description
Bit
Symbol
Description
7:6
ISR[7:6]
FIFOs enabled. These bits are set to a logic 0 when the FIFO is not
being used. They are set to a logic 1 when the FIFOs are enabled.
logic 0 or cleared = default condition
5
ISR[5]
64-byte FIFO enable.
logic 0 = 16-byte operation
logic 1 = 64-byte operation
4
ISR[4]
not used
3:1
ISR[3:1]
INT priority bit 2 to bit 0. These bits indicate the source for a pending
interrupt at interrupt priority levels 1, 2, and 3 (see Table 12).
logic 0 or cleared = default condition
0
ISR[0]
INT status.
logic 0 = an interrupt is pending and the ISR contents may be used
as a pointer to the appropriate interrupt service routine
logic 1 = no interrupt pending (normal default condition)
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SC16C750BIB64-S 功能描述:UART 接口集成电路 16CB 2.5V-5V 1CH UART 64B 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
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SC16C750BIBS,128 功能描述:UART 接口集成电路 16CB 2.5V-5V 1CH 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
SC16C750BIBS,151 功能描述:UART 接口集成电路 1CH. UART 64B 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