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參數(shù)資料
| 型號： | DS26303LN-75 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 3.3V, E1/T1/J1, Short-Haul, Octal Line Interface Unit |
| 中文描述： | 3.3，E1/T1/J1，短途，八線路接口單元 |
| 文件頁數(shù)： | 74/97頁 |
| 文件大?。?/td> | 966K |
| 代理商： | DS26303LN-75 |
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DS26303: 3.3V, T1/E1/J1, Short-Haul, Octal Line Interface Unit
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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 JTDI and JTDO.
While in the shift-IR state, a rising edge on TCLK with JTMS LOW will shift the data one stage towards the serial
output at JTDO. A rising edge on TCLK 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 TCLK will latch the data in the instruction shift
register to the instruction parallel output. Instructions supported by the DS26303 and its respective operational
binary codes are shown in
Table 7-1
.
Table 7-1. Instruction Codes for IEEE 1149.1 Architecture
INSTRUCTION
EXTEST
HIGHZ
CLAMP
SAMPLE/PRELOAD
IDCODE
BYPASS
SELECTED REGISTER
Boundary Scan
Bypass
Bypass
Boundary Scan
Device Identification
Bypass
INSTRUCTION CODES
000
010
011
100
110
111
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.
HIGHZ
All digital outputs of the device will be placed in a HIGHZ state. The BYPASS register will be connected between
JTDI and JTDO.
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.
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 JTDI using the Shift-DR state.
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 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
Table 7-2
.
Table 7-3
lists the
device ID code for the DS26303.
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 not affecting the device’s normal
operation.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS26303LN-75+ | 功能描述:電信線路管理 IC 3.3V E1/T1/J1 Short Haul Octal LIU RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray |
| DS26303LN-75+A3 | 功能描述:電信線路管理 IC 3.3V E1/T1/J1 Short Haul Octal LIU RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray |
| DS26303LN-75A3 | 功能描述:電信線路管理 IC 3.3V E1/T1/J1 Short Haul Octal LIU RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray |
| DS26303LN-XXX | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:3.3V, E1/T1/J1, Short-Haul, Octal Line Interface Unit |
| DS26303LN-XXX+ | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:3.3V, E1/T1/J1, Short-Haul, Octal Line Interface Unit |
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