參數(shù)資料
型號(hào)： NS16C2752
廠商： National Semiconductor Corporation
英文描述： Dual UART with 16-byte/64-byte FIFOs and up to 5 Mbit/s Data Rate
中文描述： 雙UART與16-byte/64-byte FIFO和高達(dá)5 Mbit / s的數(shù)據(jù)速率
文件頁(yè)數(shù)： 22/43頁(yè)
文件大?。?/td> 881K
代理商： NS16C2752
6.0 Register Set
(Continued)
6.9 MODEM STATUS REGISTER (MSR)
This register provides the current state of the control lines
from the MODEM (or peripheral device) to the CPU. In
addition to this current-state information, four bits of the
MODEM Status Register provide change information. The
latter bits are set to a logic 1 whenever a control input from
the MODEM changes state. They are reset to logic 0 when-
ever the CPU reads the MODEM Status Register.
TABLE 13. MSR (0x6)
Bit
7
Bit Name
DCD Input
Status
R/W
Def
R
DCD
Description
DCD Input Status
This bit is the complement of the Data Carrier Detect (DCD) input. In the loopback mode,
this bit is equivalent to the OUT2 of the MCR.
1 = DCD input is logic 0.
0 = DCD input is logic 1.
RI Input Status
This bit is the complement of the Ring Indicator (RI) input. In the loopback mode, this bit is
equivalent to OUT1 of the MCR.
1 = RI input is logic 0.
0 = RI input is logic 1.
DSR Input Status
This bit is the complement of the Data Set Ready (DSR) input. In the loopback mode, this
bit is equivalent to DTR in the MCR.
1 = DSR input is logic 0.
0 = DSR input is logic 1.
CTS Input Status
This bit is the complement of the Clear to Send (CTS) input. In the loopback mode, this bit
is equivalent to RTS in the MCR.
1 = CTS input is logic 0.
0 = CTS input is logic 1.
Delta DCD Input Indicator
This bit is the Delta Data Carrier Detect (DDCD) indicator. Bit 3 indicates that the DCD
input has changed state since the last read by the host.
1 = DCD input has changed state.
0 = DCD input has no state change (default).
6
RI Input
Status
R
RI
5
DSR Input
Status
R
DSR
4
CTS Input
Status
R
CTS
3
DDCD
Input
Status
R
0
Note:
Whenever bit 0, 1, 2, or 3 is set to logic 1, a MODEM Status Interrupt is generated.
Falling Edge RI Indicator
This bit is theFalling Edge of Ring Indicator (TERI) detector. Bit 2 indicates that the RI
input pin has changed from a logic 0 to 1 since the last read by the host.
1 = RI input has changed state from logic 0 to 1.
0 = RI input has no state change from 0 to 1 (default).
Delta DSR Input Indicator
This bit is the Delta Data Set Ready (DDSR) indicator. Bit 1 indicates that the DSR input
pin has changed state since the last read by the host.
1 = DSR input has changed state from logic 0 to 1.
0 = DSR input has no state change from 0 to 1 (default).
Delta CTS Input Indicator
This bit is the Delta Clear to Send (DCTS) indicator. Bit 0 indicates that the CTS input pin
has changed state since the last time it was read by the host.
1 = CTS input has changed state.
0 = CTS input has no state change (default).
2
Falling
Edge RI
Indicator
R
0
1
DDSR
Input
Indicator
R
0
0
DCTS
Input
Indicator
R
0
N
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相關(guān)PDF資料
PDF描述
NS16C2752TVA Dual UART with 16-byte/64-byte FIFOs and up to 5 Mbit/s Data Rate
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
NS16C2752TVA 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:Dual UART with 16-byte/64-byte FIFOs and up to 5 Mbit/s Data Rate
NS16C2752TVA/NOPB 功能描述:UART 接口集成電路 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
NS16C2752TVAX/NOPB 功能描述:UART 接口集成電路 Dual UART w/ 64-byte 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
NS16C2752TVS 制造商:Texas Instruments 功能描述:UART 2-CH 64Byte FIFO 3.3V/5V 48-Pin TQFP
NS16C2752TVS/NOPB 功能描述:UART 接口集成電路 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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