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參數資料
| 型號： | DS26900LN+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數： | 13/49頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC JTAG MUX/SWITCH 144-LQFP |
| 標準包裝： | 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 |
| 供應商設備封裝： | 144-LQFP（20x20） |
| 包裝： | 托盤 |
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__________________________________________________________________________________________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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相關代理商/技術參數 |
參數描述 |
|---|---|
| DS26900LN+ | 功能描述:多路器開關 IC JTAG MUX RoHS:否 制造商:Texas Instruments 通道數量:1 開關數量:4 開啟電阻（最大值）:7 Ohms 開啟時間（最大值）: 關閉時間（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 安裝風格:SMD/SMT 封裝 / 箱體:UQFN-16 |
| DS26900N+ | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:JTAG Multiplexer/Switch |
| DS26C31 | 制造商:NSC 制造商全稱: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: |
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