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| 型号： | DS26334DK |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 118/121页 |
| 文件大小： | 0K |
| 描述： | KIT DESIGN FOR DS26334 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 设计资源： | DS26334DK Gerber Files |
| 标准包装： | 1 |
| 主要目的： | 电信，线路接口单元（LIU） |
| 已用 IC / 零件： | DS26334 |
| 已供物品： | 板，线缆，电源 |
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DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
96 of 121
7.2
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 TDI and TDO. While
in the Shift-IR state, a rising edge on TCLK with TMS LOW will shift the data one stage towards the serial output at
TDO. A rising edge on TCLK in the Exit1-IR state or the Exit2-IR state with TMS HIGH will move the controller to
the Update-IR state. The falling edge of that same TCLK will latch the data in the instruction shift register to the
instruction parallel output. Instructions supported by the DS26334 and its respective operational binary codes are
shown in Table 7-1.
Table 7-1. Instruction Codes for IEEE 1149.1 Architecture
INSTRUCTION
SELECTED REGISTER
INSTRUCTION CODES
EXTEST
Boundary Scan
000
HIGHZ
Bypass
010
CLAMP
Bypass
011
SAMPLE/PRELOAD
Boundary Scan
100
IDCODE
Device Identification
110
BYPASS
Bypass
111
7.2.1
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 TDI and TDO. The Capture-DR will
sample all digital inputs into the Boundary Scan Register.
7.2.2
HIGHZ
All digital outputs of the device will be placed in a high-impedance state. The Bypass Register will be connected
between TDI and TDO.
7.2.3
CLAMP
All digital outputs of the device will output data from the boundary scan parallel output while connecting the Bypass
Register between TDI and TDO. The outputs will not change during the CLAMP instruction.
7.2.4
SAMPLE/PRELOAD
This is a mandatory instruction for the IEEE 1149.1 specification that 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 TDI using the Shift-DR state.
7.2.5
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 TCLK
following entry into the Capture-DR state. Shift-DR can be used to shift the identification code out serially via TDO.
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 Table 7-2. Table 7-3 lists the
device ID code for the DS26334.
7.2.6
BYPASS
When the BYPASS instruction is latched into the Parallel Instruction Register, TDI connects to TDO through the
one-bit test Bypass Register. This allows data to pass from TDI to TDO not affecting the device’s normal operation.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS26334G | 功能描述:电信集成电路 3.3V E1/T1/J1 16Ch Short/Long Haul LIU RoHS:否 制造商:STMicroelectronics 类型:Telecom IC - Various 工作电源电压:4.75 V to 5.25 V 电源电流: 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:PQFP-100 封装:Tray |
| DS26334G+ | 功能描述:电信集成电路 3.3V E1/T1/J1 16Ch Short/Long Haul LIU RoHS:否 制造商:STMicroelectronics 类型:Telecom IC - Various 工作电源电压:4.75 V to 5.25 V 电源电流: 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:PQFP-100 封装:Tray |
| DS26334GA2 | 功能描述:电信集成电路 RoHS:否 制造商:STMicroelectronics 类型:Telecom IC - Various 工作电源电压:4.75 V to 5.25 V 电源电流: 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:PQFP-100 封装:Tray |
| DS26334GA2+ | 功能描述:电信集成电路 RoHS:否 制造商:STMicroelectronics 类型:Telecom IC - Various 工作电源电压:4.75 V to 5.25 V 电源电流: 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:PQFP-100 封装:Tray |
| DS26334GA3 | 功能描述:电信集成电路 3.3V E1/T1/J1 16Ch Short/Long Haul LIU RoHS:否 制造商:STMicroelectronics 类型:Telecom IC - Various 工作电源电压:4.75 V to 5.25 V 电源电流: 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:PQFP-100 封装:Tray |
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