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USB3750 数据表(PDF) 21 Page - Microchip Technology

部件名 USB3750
功能描述  USB 2.0 Protection IC with Battery
PDF  31 Pages
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制造商  MICROCHIP [Microchip Technology]
网页  http://www.microchip.com
标志 MICROCHIP - Microchip Technology

USB3750 数据表(HTML) 21 Page - Microchip Technology

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 2011 - 2014 Microchip Technology Inc.
DS00001824A-page 21
USB375x
4.4.6
REG 2: BATTERY CHARGER REGISTER
These bits allow I2C control of the battery charger circuits. This will allow for custom defined charger detection algorithm
to be implemented. By default the I2C control bit is off and this register is under control of the charger detection state
machine. Once the charger detection state machine is complete the I2C master can set the I2C Control register to control
the charger detection circuits.
4.4.7
REG 3: BATTERY CHARGER STATUS REGISTER
Field Name
Bit
Access
Default
Description
SeRxEn
0
r/w
0
Single Ended Receiver Enable. Wen this bit is set to
1b the single ended receivers will be enabled
ContactDetectEn
1
r/w
0
Contact Detect Current Source Enable. When this bit
is set to 1b the IDP_SRC current source shown in
Figure 4-3 will be enabled.
VdatSrcEn
2
r/w
0
Vdat voltage source enable. When this bit is set to 1b
the VdatSrc voltage source shown in Figure 4-3 will be
enabled.
HostChrgEn
3
r/w
0
When this bit is set to 1b, the charger detection
connections of DP and DM are swapped. The USB
signal path is not reversed. This is required when
differentiating between a Charging Downstream Port
(CDP) and a Dedicated Charging Port (DCP).
IdatSinkEn
4
r/w
0
Idat current sink enable. When this bit is set to 1b the
IdatSinkEn current source shown in Figure 4-3 will be
enabled.
DpPulldownEn
5
r/w
0
DP 15K pull down resistor enable. When this bit is set
to 1b the RPD 15K pull down resistor on DP shown in
Figure 4-3 will be enabled.
DmPulldownEn
6
r/w
0
DM 15K pull down resistor enable. When this bit is set
to 1b the RPD 15K pull down resistor on DM shown in
Figure 4-3 will be enabled.
I2C Control
7
r/w
0
When this bit is set to 0b the bits [6:0] are
disconnected from the Battery Charger circuits. When
this bit is set to 1b, bits [6:0] will control the charger
detection circuits.
Field Name
Bit
Access
Default
Description
VdatDet
0
rd
0
Indicates Vdat Det comparator output. A 1b indicates
that the VdatDet comparator shown in Figure 4-3 has
been tripped.
DpSeRx
1
rd
0
DP Single Ended Receiver Status. A 1b indicates that
the DP signal is above the VSE_RX threshold.
DmSeRx
2
rd
0
DM Single Ended Receiver Status. A 1b indicates that
the DM signal is above the VSE_RX threshold.
RxHiCurrent
3
rd
0
DM high current SE1 charger output. A 1b indicates
that the DM signal is above the VSE_RXH threshold.
Reserved
7:4
r
0000
Read Only.



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