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TUSB4041I-Q1 Datasheet(PDF) 12 Page - Texas Instruments |
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TUSB4041I-Q1 Datasheet(HTML) 12 Page - Texas Instruments |
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12 / 44 page  12 TUSB4041I-Q1 SLLSEK4B – JULY 2015 – REVISED JANUARY 2016 www.ti.com Product Folder Links: TUSB4041I-Q1 Submit Documentation Feedback Copyright © 2015–2016, Texas Instruments Incorporated 8.3 Feature Description 8.3.1 Battery Charging Features The TUSB4041I-Q1 device provides support for USB battery charging. Battery charging support may be enabled on a per port basis through the REG_6h(batEn[3:0]). Battery charging support includes both CDP and DCP modes. The DCP mode is compliant with the Chinese Telecommunications Industry Standard YD/T 1591-2009. In addition to standard DCP mode, the TUSB4041I-Q1 device provides a mode (AUTOMODE), which automatically provides support for DCP devices and devices that support custom charging indication. When in AUTOMODE, the port automatically switches between a divider mode and the DCP mode depending on the portable device connected. The divided mode places a fixed DC voltage on the ports DP and DM signals, which allows some devices to identify the capabilities of the charger. The default divider mode indicates support for up to 10 W. The divider mode can be configured to report a legacy current setting (up to 5 W) through REG_Ah(HiCurAcpModeEn). The battery charging mode for each port is dependent on the state of Reg_6h(batEn[n]), the status of the VBUS input, and the state of REG_Ah(autoModeEnz) upstream port as identified in Table 1. (1) Auto-mode automatically selects divider-mode or DCP mode. (2) Divider mode can be configured for legacy current mode through register settings. (3) Attached USB device is USB battery-charging specification revision 1.2 compliant (4) Chinese Telecommunications Industry Standard YD/T 1591-2009 Table 1. TUSB4041I-Q1 Battery Charging Modes batEn[n] VBUS autoModeEnz BC MODE PORT x (x = n + 1) 0 Don’t care Don’t care Don’t Care 1 <4 V 0 Automode(1)(2) 1 DCP(3)(4) >4 V Don’t care CDP(3) 8.3.2 USB Power Management The TUSB4041I-Q1 device can be configured for power-switched applications using either per-port or ganged power-enable controls and overcurrent status inputs. Power switch support is enabled by REG_5h(fullPwrMgmtz), and the per-port or ganged mode is configured by REG_5h(ganged). The TUSB4041I-Q1 device supports both active-high and active-low power-enable controls. The PWRCTL[4:1] polarity is configured by REG_Ah(pwrctlPol). 8.3.3 One-Time Programmable Configuration The TUSB4041I-Q1 device allows device configuration through one-time programmable (OTP) non-volatile memory. The programming of the OTP is supported using vendor-defined USB device requests. Contact TI for details using the OTP features Table 2 lists features that can be configured using the OTP. Table 2. OTP Configurable Features CONFIGURATION REGISTER OFFSET BIT FIELD DESCRIPTION REG_01h [7:0] Vendor ID LSB REG_02h [7:0] Vendor ID MSB REG_03h [7:0] Product ID LSB REG_04h [7:0] Product ID MSB REG_07h [0] Port-removable configuration for downstream ports 1. OTP configuration is inverse of rmbl[3:0], that is 1 = not removable, 0 = removable. |
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