参数资料
型号: SC16C550BIBS,128
厂商: NXP Semiconductors
文件页数: 18/48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:
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: 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
SC16C550B_5
NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 05 — 1 October 2008
25 of 48
NXP Semiconductors
SC16C550B
5 V, 3.3 V and 2.5 V UART with 16-byte FIFOs
7.6 Modem Control Register (MCR)
This register controls the interface with the modem or a peripheral device.
Table 19.
Modem Control Register bits description
Bit
Symbol
Description
7
MCR[7]
reserved; set to ‘0’
6
MCR[6]
reserved; set to ‘0’
5
MCR[5]
Auto ow control enable.
4
MCR[4]
Loopback. Enable the local loopback mode (diagnostics). In this mode the
transmitter output (TX) and the receiver input (RX), CTS, DSR, DCD, and
RI are disconnected from the SC16C550B I/O pins. Internally the modem
data and control pins are connected into a loopback data conguration
(see Figure 11). In this mode, the receiver and transmitter interrupts
remain fully operational. The Modem Control Interrupts are also
operational, but the interrupts’ sources are switched to the lower four bits
of the Modem Control. Interrupts continue to be controlled by the IER
register.
logic 0 = disable loopback mode (normal default condition)
logic 1 = enable local loopback mode (diagnostics)
3
MCR[3]
OUT2. Used to control the modem DCD signal in the loopback mode.
logic 0 = OUT2 is at logic 1. In the loopback mode, sets OUT2 (DCD)
internally to a logic 1.
logic 1 = OUT2 is at logic 0. In the loopback mode, sets OUT2 (DCD)
internally to a logic 0.
2
MCR[2]
OUT1. This bit is used in the Loopback mode only. In the loopback mode,
this bit is used to write the state of the modem RI interface signal via
OUT1.
1
MCR[1]
RTS
logic 0 = force RTS output to a logic 1 (normal default condition)
logic 1 = force RTS output to a logic 0
0
MCR[0]
DTR
logic 0 = force DTR output to a logic 1 (normal default condition)
logic 1 = force DTR output to a logic 0
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