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| 型号： | SC16C550BIBS,128 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 20/48页 |
| 文件大小： | 0K |
| 描述： | IC UART SOT617-1 |
| 标准包装： | 6,000 |
| 特点： | 可编程 |
| 通道数： | 1，UART |
| FIFO's： | 16 字节 |
| 电源电压： | 2.5V，3.3V，5V |
| 带自动流量控制功能： | 是 |
| 带故障启动位检测功能： | 是 |
| 带调制解调器控制功能： | 是 |
| 带CMOS： | 是 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-VFQFN 裸露焊盘 |
| 供应商设备封装： | 32-HVQFN（5x5） |
| 包装： | 带卷 (TR) |
| 其它名称： | 935279497128 SC16C550BIBS-F SC16C550BIBS-F-ND |
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SC16C550B_5
NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 05 — 1 October 2008
27 of 48
NXP Semiconductors
SC16C550B
5 V, 3.3 V and 2.5 V UART with 16-byte FIFOs
7.8 Modem Status Register (MSR)
This register provides the current state of the control interface signals from the modem, or
other peripheral device to which the SC16C550B is connected. Four bits of this register
are used to indicate the changed information. These bits are set to a logic 1 whenever a
control input from the modem changes state. These bits are set to a logic 0 whenever the
CPU reads this register.
[1]
Whenever any MSR bit 0:3 is set to logic 1, a Modem Status Interrupt will be generated.
Table 21.
Modem Status Register bits description
Bit
Symbol
Description
7
MSR[7]
Data Carrier Detect. DCD (active HIGH, logical 1). Normally this bit is the
complement of the DCD input. In the loopback mode this bit is equivalent to
the OUT2 bit in the MCR register.
6
MSR[6]
Ring Indicator. RI (active HIGH, logical 1). Normally this bit is the
complement of the RI input. In the loopback mode this bit is equivalent to the
OUT1 bit in the MCR register.
5
MSR[5]
Data Set Ready. DSR (active HIGH, logical 1). Normally this bit is the
complement of the DSR input. In loopback mode this bit is equivalent to the
DTR bit in the MCR register.
4
MSR[4]
Clear To Send. CTS. CTS functions as hardware ow control signal input if it
is enabled via MCR[5]. The transmit holding register ow control is
enabled/disabled by MSR[4]. Flow control (when enabled) allows starting and
stopping the transmissions based on the external modem CTS signal. A logic
1 at the CTS pin will stop SC16C550B transmissions as soon as current
character has nished transmission. Normally MSR[4] is the complement of
the CTS input. However, in the loopback mode, this bit is equivalent to the
RTS bit in the MCR register.
3
MSR[3]
logic 0 = no DCD change (normal default condition)
logic 1 = the DCD input to the SC16C550B has changed state since the last
time it was read. A modem Status Interrupt will be generated.
2
MSR[2]
RI[1]
logic 0 = no RI change (normal default condition).
logic 1 = the RI input to the SC16C550B has changed from a logic 0 to a
logic 1. A modem Status Interrupt will be generated.
1
MSR[1]
DSR[1]
logic 0 = no DSR change (normal default condition)
logic 1 = the DSR input to the SC16C550B has changed state since the last
time it was read. A modem Status Interrupt will be generated.
0
MSR[0]
CTS[1]
logic 0 = no CTS change (normal default condition)
logic 1 = the CTS input to the SC16C550B has changed state since the last
time it was read. A modem Status Interrupt will be generated.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SC16C550BIBS-F | 功能描述:UART 接口集成电路 16CB 2.5V-5V 1CH UART 16B 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 |
| SC16C550BIBS-S | 功能描述:UART 接口集成电路 16CB 2.5V-5V 1CH UART 16B 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 |
| SC16C550BIN40 | 制造商:NXP Semiconductors 功能描述:UART 16BYTE FIFO 16C550 DIP40 |
| SC16C550BIN40,112 | 功能描述:UART 接口集成电路 16CB 2.5V-5V 1CH UART 16B 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 |
| SC16C550IA44 | 制造商:NXP Semiconductors 功能描述:UART 16BYTE FIFO 16C550 PLCC44 |
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