参数资料
型号: DS26900LN+
厂商: Maxim Integrated Products
文件页数: 32/49页
文件大小: 0K
描述: IC JTAG MUX/SWITCH 144-LQFP
标准包装: 90
系列: *
功能: *
电压电源: 单电源
电压 - 电源,单路/双路(±): 3.14 V ~ 3.47 V
电流 - 电源: *
工作温度: *
安装类型: 表面贴装
封装/外壳: 144-LQFP
供应商设备封装: 144-LQFP(20x20)
包装: 托盘
__________________________________________________________________________________________DS26900
38
9. Periphery JTAG
9.1
Periphery JTAG Description
The DS26900 contains traditional boundary scan circuitry at the periphery of the package for board manufacturing
tests. This periphery boundary scan circuitry is independent and has priority over the operation of the master/slave
multiplexer. It contains a separate TAP controller with a 3-bit wide instruction code register. Signals associated with
the periphery boundary scan circuitry are
PTRST, PTMS, PTCK, PTDI, and PTDO.
The DS26900 supports the standard instruction codes SAMPLE/PRELOAD, BYPASS, and EXTEST. Optional
public instructions included are HIGHZ, CLAMP and IDCODE. See Figure 9-1 for a block diagram. The DS26900
contains the following items, which meet the requirements set by the IEEE 1149.1 Standard Test Access Port and
Boundary Scan Architecture:
Test Access Port (TAP)
TAP Controller
Instruction Register
Bypass Register
Boundary Scan Register
Device Identification Register
Details on the Boundary Scan Architecture and the Test Access Port can be found in IEEE 1149.1-2001,
IEEE 1149.1-1990, IEEE 1149.1a-1993, and IEEE 1149.1b-1994.
Figure 9-1. Periphery JTAG Block Diagram
BOUNDARY
SCAN REGISTER
IDENTIFICATION
REGISTER
BYPASS
REGISTER
INSTRUCTION
REGISTER
TEST ACCESS PORT
CONTROLLER
MUX
SELECT
TRI-STATE
PTDI
10k
PTMS
10k
PTCLK
PTRST
10k
PTDO
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DS26900LN+ 功能描述:多路器开关 IC JTAG MUX RoHS:否 制造商:Texas Instruments 通道数量:1 开关数量:4 开启电阻(最大值):7 Ohms 开启时间(最大值): 关闭时间(最大值): 传播延迟时间:0.25 ns 工作电源电压:2.3 V to 3.6 V 工作电源电流: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UQFN-16
DS26900N+ 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:JTAG Multiplexer/Switch
DS26C31 制造商:NSC 制造商全称:National Semiconductor 功能描述:CMOS QUAD TRI-STATE DIFFERENTIAL LINE DRIVER
DS26C31 DIE 制造商:Texas Instruments 功能描述:
DS26C31_BBA3026X WAF 制造商:Texas Instruments 功能描述: