Microchip Technology EVB-USB4715, Руководство пользователя

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2017 Microchip Technology Inc. DS50002679A-page 17
3.1.2 Power Source - Self Powered
The EVB-USB4715 only supports self-powered operation, and is powered through one
+12.0V regulated 'wall wart' external power supply. The power supply plugs into the 2.5
mm connector
J11 on the board. Alternatively, an external voltage can be supplied to
the screw terminal TERM_BLOCK_2P ( J12 ). The +12.0V feeds a 10A regulator which
o5.2V to devices on the board and also supplies the +3.3V regulator.
3.1.3 Downstream Port Power Control
USB power to the four downstream ports is controlled via port power controllers with
auto-discharge function.
The two downstream Type-C ports are capable of up to 3A of USB Type-C battery
charging. Downstream port 1 is configured for 3A charging by default. The two down-
stream USB Type-A ports are capable of up to 2.1A of USB battery charging.
3.1.4 USB Type-C Ports
The EVB-USB4715 has two Type-C ports. These are USB 2.0 HS ports. The USB
Type-C ports utilize the Microchip UPD360 Type-C port controller in order to detect
USB Type-C attachment and plug orientation. The UPD360 monitors the voltage on the
USB Type-C CC wires in order to detect USB Type-C attach events. The downstream
ports 1 and 2 use UPD360s configured for 3A operation by default.
3.1.5 LED Indicators on EVB-USB4715
Table 3-3 describes the LED indicators included on the EVB-USB4715.
Note: The supplied 12.0V external power supply cannot support simultaneous
battery charging on all downstream ports. Use a higher power supply if the
required test use case exceeds the power capability of the supply. Failure
to heed to this warning could result in damage to the 12.0V external power
supply.
TABLE 3-3: LED INDICATOR DESCRIPTIONS
REF.
DES.
LABEL DESCRIPTION
D1 “C’nct3” PORT3 is connected (enumerated)
D2 “C’nct2” PORT2 is connected (enumerated)
D3 “C’nct1” PORT1 is connected (enumerated)
D4 “C’nct4” PORT4 is connected (enumerated)
D5 “RESET” The RST_N signal is asserted.
D6 “PORT0 VBUS” Illuminates when 5V to upstream PORT0 VBUS is present.
D7 “PORT3 VBUS” Illuminates when 5V to upstream PORT3 VBUS is present.
D8 “PORT4 VBUS” Illuminates when 5V to upstream PORT4 VBUS is present.
D9 “PORT1 VBUS” Illuminates when 5V to upstream PORT1 VBUS is present.
D11 “ATTACH1” Illuminates when a device is detected by CC signals on PORT1.
D12 “PORT2 VBUS” Illuminates when 5V to upstream PORT2 VBUS is present.
D14 “ATTACH2” Illuminates when a device is detected by CC signals on PORT2.
D17 “3V3” Indicates 3.3V is present from the 3.3V voltage regulator.
D18 “SPI Flash
Active”
Indicates SPI Flash Memory activity.