USB Host
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USB Hub/Device
Configured as
DRP
Micro AB to
Type-A
Receptacle
HD3SS2522 EVM
TUSB320-xA-EVM
TUSB320-LA-EVM and TUSB320-HA-EVM Configuration Examples
7
SLLU235A – January 2016 – Revised November 2018
Copyright © 2016–2018, Texas Instruments Incorporated
TUSB320-LA-EVM and TUSB320-HA-EVM
3.3
DRP Operation
The board can be configured to operate in DFP mode using the PORT pin on the board or I2C register
setting. If the PORT pin is used, SW1.7 must be switched ON and the Mode_Select bits at addr0x0A bit
5:4 must be set to 00b. The Mode_Select is 00b by default, so there is no need to reprogram unless it has
been reconfigured for other modes of operation. It is important that both SW settings are in the OFF
position to have the PORT input to the TUSB320LA/HA open.
illustrates an example configuration using HD3SS2522 and TUSB320-xA-EVMs. The
HD3SS2522 is a TI DFP CC controller, compliant to USB Type-C spec v1.1.
Figure 3. Example Configuration Using HD3SS2522 and TUSB320-xA-EVMs
1. Configure the TUSB320LA/HA DRP EVM DIP switch SW1 as shown in
.
Table 5. TUSB320LA/HA DRP EVM DIP Switch SW1
Reference
Designator
SW Control Function
Switch Setting
SW1.1
EN#/EN
ON for
TUSB320LA
OFF for
TUSB320HA
SW1.2
OUT2
OFF
SW1.3
OUT1
OFF
SW1.4
ADDR
OFF
SW1.5
INT
OFF
SW1.6
320_VBUS
Don’t care
SW1.7
PORT_H
OFF
SW1.8
PORT_L
OFF
2. Connect the HD3SS2522 EVM to a USB host.
3. Connect the TUSB320LA/HA to the HD3SS2522 using a Type-C cable. VBUS should be provided over
the Type-C cable connection. LED D10 should light up on the TUSB320LA/HA board. D3 and D4
should light up on the HD3S2522 indicating an UFP connection. Refer to the HD3SS2522 users
manual (
) for details on the HD3SS2522 EVM operation.
4. The USB devices plugged into the micro-AB USB receptacle (J6) of the TUSB320LA/HA UFP EVM
should enumerate at USB2 speed: HS, FS, or LS.
