參數(shù)資料
型號(hào)： TPS23841_07
廠商： Texas Instruments, Inc.
英文描述： HIGH-POWER, WIDE VOLTAGE RANGE, QUAD-PORT ETHERNET POWER SOURCING EQUIPMENT MANAGER
中文描述： 大功率，寬電壓范圍，四端口以太網(wǎng)供電設(shè)備管理器
文件頁(yè)數(shù)： 29/52頁(yè)
文件大小： 1011K
代理商： TPS23841_07
www.ti.com
Start/Stop
Chip Address
SCL
SDA
C
C
C
C
WriteCycle
SDA_I
ReadCycle
SDA_O
A7
A6
A5
A4
A3
A2
A1
A0
D7
R3
R2
R1
R0
D2
P1
P0
D7
D6
D5
D4
D3
D2
D1
D0
A7
A6
A5
A4
A3
A2
A1
A0
D7
R3
R2
R1
R0
D2
P1
P0
A7
A6
A5
A4
A3
A2
A1
A0
D7
D6
D5
D4
D3
D2
D1
D0
S
DeviceAddress
R/W=0
R/W
Bit
Register/Port
Address
Data from
Masterto
TPS23841
S
R/W
Bit
S
DeviceAddress
R/W=0
Register/Port
Address
DeviceAddress
R/W=1
R/W
Bit
Data from
TPS23841to
Master
S
S
A
A
A
A
A
A
A
START/STOP SEQUENCE
STOP
CONDITION(P)
START
CONDITION(S)
SDA_O
SDA_I
TPS23841
SLUS745–NOVEMBER 2006
POWER MANAGEMENT MODE FUNCTIONAL DESCRIPTION (continued)
The high-to-low transition of SDA_I while SCL is high defines the start condition. The low to high transition of
SDA_I while SCL is high defines the stop condition. The master device initiates all start and stop conditions.
The first serial packet is enclosed within start and stop bits, consists of a 7-bit address field, read/write bit, and
the acknowledge bit. The acknowledge bit is always generated by the device receiving the address or data field.
Five of the seven address bits are used by the TPS23841. The value of the sixth and seventh bit is ignored and
not used by the TPS23841.
The address field of the TPS23841 is 8 bits long and contains 5 bits of device address select and a read/write
bit as and two spare bits per
Table 1
. The leading two bits are not used and are reserved for future port
expansion. The five device address select bits follow this plan. These bits are compared against the hard-wired
state of the corresponding device address select pins (A1–A5). When the field contents are equivalent to the pin
logic states, the device is addressed. These bits are followed by LSB bit, which is used to set the read or write
condition (1 for read and 0 for write). Following a start condition and an address field, the TPS23841 responds
with an acknowledge by pulling the SDA_O line low during the 9
th
clock cycle if the address field is equivalent to
the value programmed by the pins. The SDA_O line remains a stable low while the 9
th
clock pulse is high.
Figure 16. I
2
C Read/Write Cycles
29
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參數(shù)描述
TPS23841PAP 功能描述:熱插拔功率分布 HP Wide Volt Range Quad Part Ethernet 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(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
TPS23841PAPG4 功能描述:熱插拔功率分布 HP Wide Volt Range Quad Part Ethernet 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(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
TPS23841PAPR 功能描述:熱插拔功率分布 HP Wide Volt Range Quad Part Ethernet 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(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
TPS23841PAPRG4 功能描述:熱插拔功率分布 HP Wide Volt Range Quad Part Ethernet 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(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
TPS23841PJD 功能描述:熱插拔功率分布 HP Wide Volt Range Quad Part Ethernet 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(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
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