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参数资料
| 型号： | MAX5952CUAX+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 25/50页 |
| 文件大小： | 1006K |
| 描述： | IC PSE CNTRLR FOR POE 36-SSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1,000 |
| 类型： | 以太网供电控制器（PoE） |
| 应用： | 远程外设（工业控制，相机，数据访问） |
| 内部开关： | 无 |
| 工作温度： | 0°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 36-BSOP（0.295"，7.50mm 宽） |
| 供应商设备封装： | 36-SSOP |
| 包装： | 带卷 (TR) |
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High-Power, Quad, PSE Controller
for Power-Over-Ethernet
______________________________________________________________________________________ 25
Message Format for Reading
The MAX5952 reads using the MAX5952s internally
stored command byte as an address pointer, the same
way the stored command byte is used as an address
pointer for a write. The pointer auto-increments after
reading each data byte using the same rules as for a
write. Thus, a read is initiated by first configuring the
MAX5952s command byte by performing a write (Figure
11). The master now reads n consecutive bytes from
the MAX5952, with the first data byte read from the regis-
ter addressed by the initialized command byte (Figure
12). When performing read-after-write verification,
remember to reset the command bytes address
because the stored control byte address auto-incre-
ments after the write.
Operation with Multiple Masters
When the MAX5952 operates on a 2-wire interface with
multiple masters, a master reading the MAX5952
should use repeated starts between the write which
sets the MAX5952s address pointer, and the read(s)
that take the data from the location(s). It is possible for
master 2 to take over the bus after master 1 has set up
the MAX5952s address pointer but before master 1
has read the data. If master 2 subsequently resets the
MAX5952s address pointer then master 1s read may
be from an unexpected location.
Command Address Auto-Incrementing
Address auto-incrementing allows the MAX5952 to be
configured with fewer transmissions by minimizing the
number of times the command address needs to be
sent. The command address stored in the MAX5952
generally increments after each data byte is written or
read (Table 5). The MAX5952 is designed to prevent
overwrites on unavailable register addresses and unin-
tentional wrap-around of addresses.
Figure 11. Control and Single Data Byte Received
S
A
A
A
P
0
SLAVE ADDRESS
CONTROL BYTE
DATA BYTE
ACKNOWLEDGE FROM MAX5952
1 BYTE
AUTO-INCREMENT
MEMORY WORD ADDRESS
D15 D14 D13 D12 D11 D10 D9 D8
D1 D0
D3 D2
D5 D4
D7 D6
HOW CONTROL BYTE AND DATA BYTE MAP
INTO THE REGISTER
ACKNOWLEDGE FROM MAX5952
ACKNOWLEDGE FROM MAX5952
R/W
Figure 12. n Data Bytes Received
S
A
A
A
P
0
SLAVE ADDRESS
CONTROL BYTE
DATA BYTE
ACKNOWLEDGE FROM MAX5952
n BYTES
AUTO-INCREMENT
MEMORY WORD ADDRESS
D15 D14 D13 D12 D11 D10 D9 D8
D1 D0
D3 D2
D5 D4
D7 D6
HOW CONTROL BYTE AND DATA BYTE MAP
INTO THE REGISTER
ACKNOWLEDGE FROM MAX5952
ACKNOWLEDGE FROM MAX5952
R/W
Table 5. Auto-Increment Rules
COMMAND BYTE
ADDRESS RANGE
AUTO-INCREMENT BEHAVIOR
0x00 to 0x26
Command address auto-increments
after byte read or written
0x26
Command address remains at 0x26
after byte written or read
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX5952DEAX+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX5952DEAX+T | 制造商:Maxim Integrated Products 功能描述:HIGH-POWER QUAD PSE CONTROLLER FOR - Tape and Reel |
| MAX5952DUAX+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX5952DUAX+T | 制造商:Maxim Integrated Products 功能描述:HIGH-POWER QUAD PSE CONTROLLER FOR - Tape and Reel |
| MAX5953AUTM+ | 功能描述:电压模式 PWM 控制器 IEEE 802.3af PD Int & PWM Controller RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
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