參數(shù)資料
型號(hào)： SC28L202A1
廠商： NXP Semiconductors N.V.
英文描述： Dual universal asynchronous receiver/transmitter DUART
中文描述： 雙路通用異步接收器/發(fā)送器杜阿爾特
文件頁(yè)數(shù)： 31/77頁(yè)
文件大?。?/td> 531K
代理商： SC28L202A1
Philips Semiconductors
Objective specification
SC28L202
Dual UART
2000 Feb 10
25
MR3 – Mode Register 3, A and B
Bit 7
Xon/Xoff
1
transparency
Bit 6
Address Recognition
1
transparency
Bit 5:4
Reserved
Bit 3:2
In–band flow control
mode
Bit 1:0
Address
Recognition
control
00 = Default
01 = Auto wake
10 = Auto doze
11 = Auto wake
and auto doze
0 = flow control characters
received are loaded onto
the RxFIFO
1 = flow control characters
received are
not
loaded
onto the RxFIFO
0 = Address characters
received are loaded to
RxFIFO
1 = Address characters
received are
not
loaded onto
the RxFIFO
00 = host mode, only the host
CPU may initiate flow control
actions through the CR
01 = Auto Transmitter flow
control
10 = Auto Receiver flow control
11 = Auto Rx and Tx flow control
NOTE:
1. If these bits are not 0 the characters will be stripped regardless of bits (3:2) or (1:0)
MR3[7 & 6] Xon/Xoff Character Stripping
Control the handling of recognized Xon/Xoff or Address characters.
If set, the character codes are placed on the RxFIFO along with their
status bits just as ordinary characters are. If the character is not
loaded onto the RxFIFO, its received status will be lost unless the
receiver is operating in the block error mode, see MR1[5] and the
general discussion on receiver error handling. Interrupt processing
is not effected by the setting of these bits. See Character recognition
section.
MR3[5:4] Reserved
MR3[3:2] Xon/Xoff Processing
Control the Xon/Xoff processing logic. Auto Transmitter flow control
allows the gating of Transmitter activity by Xon/Xoff characters
received by the Channel’s receiver. Auto Receiver flow control
causes the Transmitter to emit an Xoff character when the RxFIFO
has loaded to a depth of 240 characters. Draining the RxFIFO to a
level of 128 or less causes the Transmitter to emit a Xon character.
All transmissions require no host involvement. A setting other than
b’00 in this field precludes the use of the command register to
transmit Xon/Xoff characters.
NOTE:
Interrupt generation in Xon/Xoff processing is controlled by
the IMR (Interrupt Mask Register) of the individual channels. The
interrupt may be cleared by a read of the XISR, the Xon/Xoff
Interrupt Status Register. Receipt of a flow control character will
always generate an interrupt if the IMR is so programmed. The
MR0[3:2] bits have effect on the automatic aspects of flow control
only, not the interrupt generation.
MR3[1:0] Address Recognition
This field controls the operation of the Address recognition logic. If
the device is not operating in the special or ”wake–up” mode, this
hardware may be used as a general–purpose character detector by
choosing any combination except b’00. Interrupt generation is
controlled by the channel IMR. The interrupt may be cleared by a
read of the XISR, the Xon/Xoff Interrupt Status Register. See further
description in the section on the Wake Up mode.
相關(guān)PDF資料
PDF描述
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SC28L202A1B 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Dual universal asynchronous receiver/transmitter DUART
SC28L202A1D 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Dual universal asynchronous receiver/transmitter DUART
SC28L202A1DGG 功能描述:UART 接口集成電路 3-5V 2CH UART 3MBPS 256B 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
SC28L202A1DGG,112 功能描述:UART 接口集成電路 3-5V 2CH UART 3MBPS 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
SC28L202A1DGG,118 功能描述:UART 接口集成電路 3-5V 2CH UART 3MBPS 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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