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| 型号： | MAX5965AEAX+ |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | High-Power, Quad, Monolithic, PSE Controllers for Power over Ethernet; Package: SSOP;36 pin;163 mm² ; Temperature: -40°C to +85°C |
| 中文描述： | 4-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO36 |
| 封装： | ROHS COMPLIANT, SSOP-36 |
| 文件页数： | 33/54页 |
| 文件大小： | 1525K |
| 代理商： | MAX5965AEAX+ |
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MAX5965A/MAX5965B
High-Power, Quad, Monolithic, PSE Controllers
for Power over Ethernet
______________________________________________________________________________________
39
Enable 2-event classification for a port by setting the corre-
sponding ENx_CL6 bit (Table 25). When the bit is enabled,
the classification cycle will be repeated three times at
21.3ms intervals. The device keeps the output voltage
around -9V between each cycle. The repetition of the clas-
sification cycles enables discovering of class 6 PDs. The
ENx_CL6 bit is active only in auto- or semi-mode.
Note: Performing three consecutive classifications in
manual mode is not the same as performing 2-event
classification in semi or auto mode.
Enable the SMODE function (Table 25) by setting
EN_WHDOG (R1Fh[7]) to 1. The 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 soft-
ware tries to power on a port, but is denied since the
port is in hardware mode. A reset sets R1Ch = 00h.
Table 25. SMODE and 2-Event Enable Register
ADDRESS = 1Ch
SYMBOL
BIT
CoR or
R/W
DESCRIPTION
EN4_CL6
7
R/W
Port 4 2-event classification enabled
EN3_CL6
6
R/W
Port 3 2-event classification enabled
EN2_CL6
5
R/W
Port 2 2-event classification enabled
EN1_CL6
4
R/W
Port 1 2-event classification enabled
SMODE4
3
CoR
Port 4 hardware control flag
SMODE3
2
CoR
Port 3 hardware control flag
SMODE2
1
CoR
Port 2 hardware control flag
SMODE1
0
CoR
Port 1 hardware control flag
Table 26. Watchdog Register
ADDRESS = 1Eh
SYMBOL
BIT
R/W
DESCRIPTION
7
R/W
WDTIME[7]
6
R/W
WDTIME[6]
5
R/W
WDTIME[5]
4
R/W
WDTIME[4]
3
R/W
WDTIME[3]
2
R/W
WDTIME[2]
1
R/W
WDTIME[1]
WDTIME
0
R/W
WDTIME[0]
Set EN_WHDOG (R1Fh[7]) to 1 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 MAX5965A/
MAX5965B enter hardware-controlled mode and each
port shifts to a mode set by the HWMODE_ bit in regis-
ter R1Fh (Table 27). Use software to set WDTIME
(Table 26) and continuously set this register to some
nonzero value before the register reaches zero to pre-
vent a watchdog expiry. In this way, the software grace-
fully manages the power to ports upon a system crash
or switchover.
While in hardware-controlled mode, the MAX5965A/
MAX5965B ignore all requests to turn the power on and
the flag SMODE_ indicates that the hardware has taken
control of the MAX5965A/MAX5965B operation. In addi-
tion, the software is not allowed to change the mode of
operation in hardware-controlled mode. A reset sets
R1Eh = 00h.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX5965AEAX+ | 功能描述:热插拔功率分布 Quad PSE Controller for POE RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| MAX5965AEAX+T | 功能描述:热插拔功率分布 Quad PSE Controller for POE RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| MAX5965AUAX+ | 功能描述:热插拔功率分布 Quad PSE Controller for POE RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| MAX5965AUAX+T | 功能描述:热插拔功率分布 Quad PSE Controller for POE RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| MAX5965BCAX+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
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