參數(shù)資料
型號： MAX5965AUAX+
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 電源管理
英文描述： High-Power, Quad, Monolithic, PSE Controllers for Power over Ethernet; Package: SSOP;36 pin;163 mm² ; Temperature: 0°C to +85°C
中文描述： 4-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO36
封裝： ROHS COMPLIANT, SSOP-36
文件頁數(shù)： 20/54頁
文件大小： 1525K
代理商： MAX5965AUAX+
MAX5965A/MAX5965B
High-Power, Quad, Monolithic, PSE Controllers
for Power over Ethernet
______________________________________________________________________________________
27
Message Format for Reading
The MAX5965A/MAX5965B read using the MAX5965A/
MAX5965B’s 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 point-
er autoincrements after reading each data byte using the
same rules as for a write. Thus, a read is initiated by first
configuring the MAX5965A/MAX5965B’s command byte
by performing a write. The master now reads ‘n’ consec-
utive bytes from the MAX5965A/MAX5965B, with the first
data byte read from the register addressed by the initial-
ized command byte. When performing read-after-write
verification, remember to reset the command byte’s
address because the stored control byte address autoin-
crements after the write.
Operation with Multiple Masters
When the MAX5965A/MAX5965B operate on a 2-wire
interface with multiple masters, a master reading the
MAX5965A/MAX5965B should use repeated starts
between the write which sets the MAX5965A/
MAX5965B’s 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
MAX5965A/MAX5965B’s address pointer but before mas-
ter 1 has read the data. If master 2 subsequently resets
the MAX5965A/MAX5965B’s address pointer then master
1’s read may be from an unexpected location.
Command Address Autoincrementing
Address autoincrementing allows the MAX5965A/
MAX5965B 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 MAX5965A/MAX5965B generally incre-
ments after each data byte is written or read (Table 5).
The MAX5965A/MAX5965B are designed to prevent
overwrites on unavailable register addresses and unin-
tentional wrap-around of addresses.
Figure 11. Control and Single Data Byte Received
SA
A
P
0
SLAVE ADDRESS
CONTROL BYTE
DATA BYTE
ACKNOWLEDGE FROM THE MAX5965A/MAX5965B
1 BYTE
AUTOINCREMENT
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 THE MAX5965A/MAX5965B
R/W
Figure 12. ‘n’ Data Bytes Received
SA
A
P
0
SLAVE ADDRESS
CONTROL BYTE
DATA BYTE
ACKNOWLEDGE FROM THE MAX5965A/MAX5965B
n BYTES
AUTOINCREMENT
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 THE MAX5965A/MAX5965B
R/W
Table 5. Autoincrement Rules
COMMAND BYTE
ADDRESS RANGE
AUTOINCREMENT BEHAVIOR
0x00 to 0x26
Command address autoincrements
after byte read or written
0x26
Command address remains at 0x26
after byte written or read
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參數(shù)描述
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MAX5965AUAX+T 功能描述:熱插拔功率分布 Quad PSE Controller for POE 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
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MAX5965BEAX+ 功能描述:熱插拔功率分布 Quad PSE Controller for POE 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
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