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參數(shù)資料
| 型號： | MAX5945EAX |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | Quad Network Power Controller for Power-Over-LAN |
| 中文描述： | 4-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO36 |
| 封裝： | 0.80 MM PICTH, SSOP-36 |
| 文件頁數(shù)： | 31/44頁 |
| 文件大?。?/td> | 572K |
| 代理商： | MAX5945EAX |
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Writing a 1 to CLR_INT (Table 22) clears all the event
registers and the corresponding interrupt bits in register
R00h. Writing a 1 to RESET_P_ turns off power to the cor-
responding port and resets only the status and event
registers of that port. After execution, the bits reset to 0.
Writing a 1 to RESET_IC causes a global software reset,
after which the register map is set back to its reset state.
A reset sets R1Ah = 00h.
Enable SMODE function (Table 24) by setting
EN_WHDOG (R1Fh[7]) to 1. SMODE_ bit goes high when
the watchdog counter reaches zero and the port(s)
switch over to hardware-controlled mode. SMODE_ also
goes high each and every time the software tries to
power-on a port but is denied since the port is in hard-
ware mode. A reset sets R1Ch = 00h.
Set EN_WHDOG (R1Fh[7]) to 1 (Table 25) to enable the
watchdog function. When activated, the watchdog timer
counter, WDTIME[7:0], continuously decrements toward
zero once every 164ms. Once the counter reaches zero
(also called watchdog expiry), the MAX5945 enters hard-
ware-controlled mode and each port shifts to a mode set
by the HWMODE_ bit in register R1Fh (Table 24). Use
software to set WDTIME and continuously set this register
to some non-zero value before the register reaches zero
to prevent a watchdog expiry. In this way, the software
gracefully manages the power to ports upon a system
crash or switchover.
While in hardware-controlled mode, the MAX5945
ignores all requests to turn the power on and the flag
SMODE_ indicates that the hardware took control of the
MAX5945 operation. In addition, the software is not
allowed to change the mode of operation in hardware-
controlled mode. A reset sets R1Eh = 00h.
Setting EN_WHDOG (Table 26) high activates the
watchdog counter. When the counter reaches zero, the
port switches to the hardware-controlled mode deter-
mined by the corresponding HWMODE_ bit. A low in
HWMODE_ switches the port into shutdown by setting
M
Quad Network Power Controller
for Power-Over-LAN
______________________________________________________________________________________
31
ADDRESS = 1Bh
SYMBOL
BIT
7
6
5
4
3
2
1
0
R/W
R
R
R
R
R
R
R
R
DESCRIPTION
ID_CODE[4]
ID_CODE[3]
ID_CODE[2]
ID_CODE[1]
ID_CODE[0]
REV [2]
REV [1]
REV [0]
ID_CODE
REV
Table 23. ID Register
ID register keeps track of the device ID number and revision. The MAX5945’s ID_CODE[4:0] = 11000b. Contact the factory for
REV[2:0] value.
ADDRESS = 1Ch
SYMBOL
Reserved
Reserved
Reserved
Reserved
SMODE4
SMODE3
SMODE2
SMODE1
BIT
7
6
5
4
3
2
1
0
CoR
—
—
—
—
CoR
CoR
CoR
CoR
DESCRIPTION
Reserved
Reserved
Reserved
Reserved
Hardware control flag for port 4
Hardware control flag for port 3
Hardware control flag for port 2
Hardware control flag for port 1
Table 24. SMODE Register
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX5948 | AND-OR-invert Gates 14-CFP -55 to 125 |
| MAX5948A | -48V Hot-Swap Controllers with External RSENSE |
| MAX5948AESA | -48V Hot-Swap Controllers with External RSENSE |
| MAX5948B | 4-2-3-2 Input AND-OR-invert Gates 14-CDIP -55 to 125 |
| MAX5948BESA | -48V Hot-Swap Controllers with External RSENSE |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX5945EAX+ | 功能描述:熱插拔功率分布 IEEE 802.3af Quad Net Pwr Controller RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| MAX5945EAX+T | 功能描述:熱插拔功率分布 IEEE 802.3af Quad Net Pwr Controller RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| MAX5945EAX-T | 功能描述:熱插拔功率分布 RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| MAX5945EVKIT | 功能描述:電源管理IC開發(fā)工具 Evaluation Kit/Evaluation System for the MAX5945 RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| MAX5945EVSYS | 功能描述:電源管理IC開發(fā)工具 Evaluation Kit/Evaluation System for the MAX5945 RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
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