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UCS2112 Datasheet(PDF) 38 Page - Microchip Technology

Part # UCS2112
Description  USB Dual-Port Power Switch and Current Monitor
PDF  64 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

UCS2112 Datasheet(HTML) 38 Page - Microchip Technology

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UCS2112
DS20005424B-page 38
 2015 Microchip Technology Inc.
9.1
Current Measurement Register
The Current Measurement register stores the mea-
sured current value delivered to the portable device
(IBUS). This value is updated continuously while the
device is in the Active power state.
20h
Port 2 Charge Rationing
Threshold High Byte
R/W
Sets the maximum allowed charge that will
be delivered to Port 2
FFh
52
21h
Port 2 Charge Rationing
Threshold Low Byte
R/W
Sets the maximum allowed charge that will
be delivered to Port 2
FFh
52
22h
Ration Configuration
R/W
Controls Charge Ration Functionality
11h
53
23h
Port 1 Current Limit Behavior
R/W
Controls the Current Limiting Behavior (CC
Mode Region 2) for Port 1
96h
54
24h
Port 2 Current Limit Behavior
R/W
Controls the Current Limiting Behavior (CC
Mode Region 2) for Port 2
96h
54
FDh
Product ID
R
Stores a fixed value that identifies each
product
E0hE1h
55
FEh
Manufacturer ID
R
Stores a fixed value that identifies Microchip
5Dh
55
FFh
Revision
R
Stores a fixed value that represents the
revision number
81h
55
TABLE 9-1:
REGISTER SET IN HEXADECIMAL ORDER (CONTINUED)
Register
Address
Register Name
R/W
Function
Default
Value
Page
No.
REGISTER 9-1:
PORTS 1 AND 2 CURRENT MEASUREMENT REGISTERS
(ADDRESSES 00H, 01H)
R-0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
CM(x)<7:0>
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 7:0
CM(x)<7:0>:
Port X Current Measurement, where x=1 or 2 (address 00h for Port 1 and address 01h for
Port 2).
Note 1:
The bit weights are in mA,1 LSB = 13.3 mA (maximum value is 255 LSB corresponding to 3.4A).
2:
This data will be cleared when the device enters the Sleep or Detect states. This data will also be cleared
whenever the port power switch is turned off (or any time that VBUS is discharged).



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