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UCS1002-3 Datasheet(PDF) 97 Page - Microchip Technology |
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UCS1002-3 Datasheet(HTML) 97 Page - Microchip Technology |
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97 / 114 page  2023 Microchip Technology Inc. and its subsidiaries DS20006852A-page 97 UCS1002-3 10.14.2 CUSTOM CURRENT LIMITING BEHAVIOR CONFIGURATION REGISTER The Custom Current Limiting Behavior Configuration Register enables programming of current limit parameters. These controls are used when a portable device handshakes using the Legacy charger emulation profiles (except Legacy 3), the Custom charger emulation profile, or does not handshake as a dedicated charger (that is, a power thief). The contents of this register are retained in Sleep. REGISTER 10-49: CUSTOM CURRENT LIMITING BEHAVIOR CONFIG REGISTER (ADDRESS 51h) R/W-1 R/W-0 U-x R/W-0 R/W-0 R/W-0 R/W-1 R/W-0 CS_VBUS_MIN[1:0] — CS_R2_IMIN[2:0] RESERVED 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 7-6 CS_VBUS_MIN[1:0]: Defines the Custom VBUS_MIN voltage as shown below. Note that VBUS_MIN is checked even when operating with Trip Current Limiting. 00 = 1.5V 01 = 1.75V 10 = 2.0V (default) 11 = 2.25V bit 5 Unimplemented bit 4-2 CS_R2_IMIN[2:0]: Define the Custom IBUS_R2MIN threshold as shown below. The default is 100 mA. This value is used under the following conditions: when a portable device handshakes using the Legacy charger emulation profiles (except Legacy 2) the Custom charger emulation profile, or when it does not handshake in DCE Cycle (that is, a power thief). Under these conditions, the current limiting mode is determined by the relative value of IBUS_R2MIN and ILIM. When IBUS_R2MIN ILIM or ILIM > 1.5 A, Trip Current Limiting is used; otherwise, CC mode is used. Define the IBUS_R2MIN current as follows: 000 = 100 mA 001 = 500 mA 010 = 900 mA 011 = 1200 mA 100 = 1500 mA 101 = 1800 mA bit 1-0 RESERVED: Do not change. |
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