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| 型號(hào)： | DS26522GN |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類(lèi)： | 數(shù)字傳輸電路 |
| 英文描述： | Dual T1/E1/J1 Transceiver |
| 中文描述： | DATACOM, TIME SLOT 0/16 TRANSCEIVER, PBGA144 |
| 封裝： | CSBGA-144 |
| 文件頁(yè)數(shù)： | 254/258頁(yè) |
| 文件大?。?/td> | 1263K |
| 代理商： | DS26522GN |
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DS26522 Dual T1/E1/J1 Transceiver
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13.2 Instruction Register
The instruction register contains a shift register as well as a latched parallel output and is 3 bits in length. When the
TAP controller enters the Shift-IR state, the instruction shift register will be connected between JTDI and JTDO.
While in the Shift-IR state, a rising edge on JTCLK with JTMS LOW will shift the data one stage towards the serial
output at JTDO. A rising edge on JTCLK in the Exit1-IR state or the Exit2-IR state with JTMS HIGH will move the
controller to the Update-IR state. The falling edge of that same JTCLK will latch the data in the instruction shift
register to the instruction parallel output. Instructions supported by the DS26522 and its respective operational
binary codes are shown in
Table 13-1
.
Table 13-1. Instruction Codes for IEEE 1149.1 Architecture
INSTRUCTION
SAMPLE:PRELOAD
BYPASS
EXTEST
CLAMP
HIGHZ
IDCODE
SELECTED REGISTER
Boundary Scan
Bypass
Boundary Scan
Bypass
Bypass
Device Identification
INSTRUCTION CODES
010
111
000
011
100
001
13.2.1 SAMPLE:PRELOAD
This is a mandatory instruction for the IEEE 1149.1 specification. This instruction supports two functions. The
digital I/Os of the device can be sampled at the boundary scan register without interfering with the normal operation
of the device by using the Capture-DR state. SAMPLE:PRELOAD also allows the device to shift data into the
boundary scan register via JTDI using the Shift-DR state.
13.2.2 BYPASS
When the BYPASS instruction is latched into the parallel instruction register, JTDI connects to JTDO through the
one-bit bypass test register. This allows data to pass from JTDI to JTDO without affecting the device’s normal
operation.
13.2.3 EXTEST
This allows testing of all interconnections to the device. When the EXTEST instruction is latched in the instruction
register, the following actions occur. Once enabled via the Update-IR state, the parallel outputs of all digital output
pins will be driven. The boundary scan register will be connected between JTDI and JTDO. The Capture-DR will
sample all digital inputs into the boundary scan register.
13.2.4 CLAMP
All digital outputs of the device will output data from the boundary scan parallel output while connecting the bypass
register between JTDI and JTDO. The outputs will not change during the CLAMP instruction.
13.2.5 HIGHZ
All digital outputs of the device will be placed in a high-impedance state. The BYPASS register will be connected
between JTDI and JTDO.
13.2.6 IDCODE
When the IDCODE instruction is latched into the parallel instruction register, the identification test register is
selected. The device identification code will be loaded into the identification register on the rising edge of JTCLK
following entry into the Capture-DR state. Shift-DR can be used to shift the identification code out serially via
JTDO. During Test-Logic-Reset, the identification code is forced into the instruction register’s parallel output. The
ID code will always have a 1 in the LSB position. The next 11 bits identify the manufacturer’s JEDEC number and
number of continuation bytes followed by 16 bits for the device and 4 bits for the version.
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相關(guān)代理商/技術(shù)參數(shù) |
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| DS26522GN+ | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 2-Port E1/T1/J1 Transceiver 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 |
| DS26524 | 制造商:MAXIM 制造商全稱(chēng):Maxim Integrated Products 功能描述:Quad T1/E1/J1 Transceiver |
| DS26524_07 | 制造商:MAXIM 制造商全稱(chēng):Maxim Integrated Products 功能描述:Quad T1/E1/J1 Transceiver |
| DS26524DK | 功能描述:網(wǎng)絡(luò)開(kāi)發(fā)工具 DS26524 Dev Kit RoHS:否 制造商:Rabbit Semiconductor 產(chǎn)品:Development Kits 類(lèi)型:Ethernet to Wi-Fi Bridges 工具用于評(píng)估:RCM6600W 數(shù)據(jù)速率:20 Mbps, 40 Mbps 接口類(lèi)型:802.11 b/g, Ethernet 工作電源電壓:3.3 V |
| DS26524G | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 4-Port E1/T1/J1 Transceiver 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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