參數(shù)資料
型號： DS26900LN+
廠商： Maxim Integrated Products
文件頁數(shù)： 13/49頁
文件大?。?/td> 0K
描述： IC JTAG MUX/SWITCH 144-LQFP
標(biāo)準(zhǔn)包裝： 90
系列： *
功能： *
電壓電源： 單電源
電壓 - 電源，單路/雙路(±)： 3.14 V ~ 3.47 V
電流 - 電源： *
工作溫度： *
安裝類型： 表面貼裝
封裝/外殼： 144-LQFP
供應(yīng)商設(shè)備封裝： 144-LQFP（20x20）
包裝： 托盤
__________________________________________________________________________________________DS26900
20
4. Detailed Description
4.1
Modes of Operation
The mode pins, M1 and M0, provide four modes of operation as described in Table 4-1.
Table 4-1. Mode Pins
M1
M0
MODE OF OPERATION
DESCRIPTION
0
Single-Package
18 secondary ports, TM1 and TM2 slave ports when configuration bit
TM_SLAVE set to logic 1.
0
1
Cascade-Master
First group of 18 secondary ports, TM1 and TM2 are slave ports.
1
0
Cascade-Extension
Second group of 18 secondary ports.
1
Deselect
Device is deselected (acts as if no master is present).
4.1.1 Single-Package Mode
Single-Package Mode allows access to 18 or 20 secondary ports. See Table 4-1 for M0 and M1 pin settings. If the
TM_SLAVE bit in the DCR register is set = 0, the device is configured for three master ports and 18 secondary
ports, as shown in Figure 4-1. If the TM_SLAVE bit in the DCR register is set = 1, the device is configured for one
master port and 20 secondary ports, as shown in Figure 4-2.. In this configuration, TM1 and TM2 are used as
secondary ports 19 and 20. If one or more master ports are unused, their REQ input pin(s) must be connected
= VDD and the remaining unused inputs must be connected = VDD or VSS, but cannot be left unconnected.
Figure 4-1. Configuration for 3 Masters, 18 Secondary Ports
DS26900
ETM
TM1
TM2
SECONDARY 1
SECONDARY 18
PREN
M[1:0] = 00
VDD
EXTERNAL
TEST MASTER
TEST MASTER 1
TEST MASTER 2
6
5
INSTRUCTION CODE = "0xxxx"
Figure 4-2. Configuration for 1 Master, 20 Secondary Ports
DS26900
ETM
SECONDARY 1
SECONDARY 18
PREN
M[1:0] = 00
VDD
EXTERNAL
TEST MASTER
6
5
INSTRUCTION CODE = "0xxxx"
SCR.TM_SLAVE = 1
SECONDARY 19
5
SECONDARY 20
5
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參數(shù)描述
DS26900LN+ 功能描述:多路器開關(guān) IC JTAG MUX RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 開關(guān)數(shù)量:4 開啟電阻（最大值）:7 Ohms 開啟時間（最大值）: 關(guān)閉時間（最大值）: 傳播延遲時間:0.25 ns 工作電源電壓:2.3 V to 3.6 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UQFN-16
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