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參數(shù)資料
| 型號： | SC16C2552 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Dual UART with 16-byte transmit and receive FIFOs |
| 中文描述： | 雙UART具有16字節(jié)的傳輸和接收FIFO |
| 文件頁數(shù)： | 21/38頁 |
| 文件大小： | 579K |
| 代理商： | SC16C2552 |
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Philips Semiconductors
SC16C2552
Dual UART with 16-byte transmit and receive FIFOs
Product data
Rev. 03 — 20 June 2003
21 of 38
9397 750 11636
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 SC16C2552 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.
0
LSR[0]
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.
Table 17:
Bit
Line Status Register bits description
…continued
Symbol
Description
Table 18:
Bit
7
Modem Status Register bits description
Symbol
Description
MSR[7]
Carrier Detect, 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] (OPA/OPB).
MSR[6]
Ring Indicator, 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]
Data Set Ready, 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]
Clear To Send, 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 SC16C2552 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 SC16C2552 has changed from a logic 0
to a logic 1. A modem Status Interrupt will be generated.
MSR[1]
DSR
[1]
Logic 0 = No DSR change (normal default condition).
Logic 1 = The DSR input to the SC16C2552 has changed state since
the last time it was read. A modem Status Interrupt will be generated.
MSR[0]
CTS
[1]
Logic 0 = No CTS change (normal default condition).
Logic 1 = The CTS input to the
SC16C2552
has changed state since
the last time it was read. A modem Status Interrupt will be generated.
6
5
4
3
2
1
0
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SC16C2552B | 制造商:PHILIPS 制造商全稱: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 |
| SC16C2552BIA44 | 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 |
| SC16C2552BIA44,512 | 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 |
| SC16C2552BIA44,518 | 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 |
| SC16C2552BIA44,529 | 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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