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型號：	DS2151QN
廠商：	Maxim Integrated Products
文件頁數(shù)：	11/60頁
文件大小：	0K
描述：	IC TXRX T1 1-CH 5V LP IND 44PLCC
標(biāo)準(zhǔn)包裝：	1
功能：	單芯片收發(fā)器
接口：	T1
電路數(shù)：	1
電源電壓：	4.75 V ~ 5.25 V
電流 - 電源：	65mA
工作溫度：	-40°C ~ 85°C
安裝類型：	表面貼裝
封裝/外殼：	44-LCC（J 形引線）
供應(yīng)商設(shè)備封裝：	44-PLCC（16.59x16.59）
包裝：	管件
包括：	警報檢測器和發(fā)生器，CSU 回路代碼發(fā)生器和檢測器，DSX-1和CSU 線路補償發(fā)生器

DS2151Q

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5 STATUS AND INFORMATION REGISTERS

There is a set of four registers that contain information on the current real time status of the DS2151Q:

Status Register 1 (SR1), Status Register 2 (SR2), Receive Information Register 1 (RIR1), and Receive

Information Register 2 (RIR2). When a particular event has occurred (or is occurring), the appropriate bit

in one of these four registers will be set to a 1. All of the bits in these registers operate in a latched

fashion. This means that if an event occurs and a bit is set to a 1 in any of the registers, it will remain set

until the user reads that bit. The bit will be cleared when it is read and it will not be set again until the

event has occurred again or if the alarm(s) is still present.

The user will always precede a read of these registers with a write. The byte written to the register will

inform the DS2151Q which bits the user wishes to read and have cleared. The user will write a byte to

one of these four registers, with a 1 in the bit positions he or she wishes to read and a 0 in the bit positions

he or she does not wish to obtain the latest information on. When a 1 is written to a bit location, the read

bit position, the read register will not be updated and the previous value will be held. A write to the status

and information registers will be immediately followed by a read of the same register. The read result

should be logically ANDed with the mask byte that was just written and this value should be written back

into the same register to ensure that the bit does indeed clear. This second write is necessary because the

alarms and events in the status registers occur asynchronously in respect to their access via the parallel

port. The write-read-write scheme is unique to the four status registers and it allows an external

microcontroller or microprocessor to individually poll certain bits without disturbing the other bits in the

The SR1 and SR2 registers have the unique ability to initiate a hardware interrupt via the INT1 and INT2

pins, respectively. Each of the alarms and events in the SR1 and SR2 can be either masked or unmasked

from the interrupt pins via the Interrupt Mask Register 1 (IMR1) and Interrupt Mask Register 2 (IMR2)

respectively.

相關(guān)代理商/技術(shù)參數(shù)	參數(shù)描述
DS2151QN/T&R+	制造商:Maxim Integrated Products 功能描述:FRAMER DS1/E1/ISDN-PRI/T1 5V 44PLCC - Tape and Reel
DS2151QN/T&R	功能描述:網(wǎng)絡(luò)控制器與處理器 IC RoHS:否制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS2151QNB	功能描述:網(wǎng)絡(luò)控制器與處理器 IC RoHS:否制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS2151QNB/T&R	制造商:Maxim Integrated Products 功能描述:T1 SINGLE CHIP XCVR REV B IND - Tape and Reel
DS2151QNB/T&R	功能描述:網(wǎng)絡(luò)控制器與處理器 IC RoHS:否制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray

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