參數(shù)資料
型號(hào)： SC16C2550
廠商： NXP Semiconductors N.V.
英文描述： Dual UART with 16 bytes of transmit and receive FIFOs and infrared (IrDA) encoder/decoder
中文描述： 雙UART具有16字節(jié)的發(fā)送和接收FIFO和紅外線（IrDA）編碼器/解碼器
文件頁(yè)數(shù)： 26/46頁(yè)
文件大?。?/td> 603K
代理商： SC16C2550
Philips Semiconductors
SC16C2550
Dual UART with 16 bytes of transmit and receive FIFOs and IrDA
encoder/decoder
Product data
Rev. 03 — 19 June 2003
26 of 46
9397 750 11621
Koninklijke Philips Electronics N.V. 2003. All rights reserved.
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 SC16C2550 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
LSR[1]
Overrun error.
Logic 0 = No overrun error (normal default condition).
Logic 1 = Overrun error. A data overrun error occurred in the
receive shift register. This happens when additional data arrives
while the FIFO is full. In this case, the previous data in the shift
register is overwritten. Note that under this condition, the data
byte in the receive shift register is not transferred into the FIFO,
therefore the data in the FIFO is not corrupted by the error.
Receive data ready.
Logic 0 = No data in receive holding register or FIFO (normal
default condition).
Logic 1 = Data has been received and is saved in the receive
holding register or FIFO.
0
LSR[0]
Table 18:
Bit
Line Status Register bits description
…continued
Symbol
Description
Table 19:
Bit
7
Modem Status Register bits description
Symbol
Description
MSR[7]
CD. During normal operation, this bit is the complement of the CD
input. Reading this bit in the loop-back mode produces the state of
MCR[3] (OP2).
MSR[6]
RI. During normal operation, this bit is the complement of the RI
input. Reading this bit in the loop-back mode produces the state of
MCR[2] (OP1).
MSR[5]
DSR. During normal operation, this bit is the complement of the
DSR input. During the loop-back mode, this bit is equivalent to
MCR[0] (DTR).
MSR[4]
CTS. During normal operation, this bit is the complement of the
CTS input. During the loop-back mode, this bit is equivalent to
MCR[1] (RTS).
MSR[3]
CD
[1]
Logic 0 = No CD change (normal default condition).
Logic 1 = The CD input to the SC16C2550 has changed state
since the last time it was read. A modem Status Interrupt will be
generated.
MSR[2]
RI
[1]
Logic 0 = No RI change (normal default condition).
Logic 1 = The RI input to the SC16C2550 has changed from a
logic 0 to a logic 1. A modem Status Interrupt will be generated.
6
5
4
3
2
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SC16C2550B 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:5 V, 3.3 V and 2.5 V dual UART, 5 Mbit/s (max.), with 16-byte FIFOs
SC16C2550B_07 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:5 V, 3.3 V and 2.5 V dual UART, 5 Mbit/s (max.), with 16-byte FIFOs
SC16C2550BIA44 功能描述:UART 接口集成電路 16CB 2.5V-5V 2CH UART 16B 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
SC16C2550BIA44,512 功能描述:UART 接口集成電路 16CB 2.5V-5V 2CH 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
SC16C2550BIA44,518 功能描述:UART 接口集成電路 2CH. UART 16B 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
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