HD3SS3220 Datasheet, PDF (17/43 Pages) Texas Instruments – USB Type-C DRP Port Controller with SuperSpeed 2:1 MUX

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HD3SS3220
SLLSES1 – DECEMBER 2015
Device Functional Modes (continued)
Table 4. USB Type-C States according to HD3SS3220 Functional Modes (continued)
MODES
GENERAL BEHAVIOR
MODE
STATES ⁽¹⁾
Dead battery
Shutdown
No operation. VDD5 not available.
No operation. VDD5 available and ENn_CC
pin is high
DRP
DRP
Default device state to UFP/SNK with R_(d).
Default device state to UFP/SNK with R_(d).
7.4.1 Unattached Mode
Unattached mode isthe primary mode of operation for the HD3SS3220 since a USB port can be unattached for a
lengthy period of time. In Unattached mode, VDD5 is available, and all IOs and I²C are operational. VCONN is
disabled.
After HD3SS3220 are powered up, the part enters unattached mode until a successful attach has been
determined. Initially, right after power up, the HD3SS3220 comes up as an unattached.SNK. The HD3SS3220
checks the PORT pin and operate according to the mode configuration. This means that the HD3SS3220 toggle
between UFP and DFP if configured as a DRP
7.4.2 Active Mode
Active mode is defined as the port being attached. In active mode, all GPIOs are operational, and I²C is read /
write (R/W). When in active mode, the HD3SS3220 device communicates to the AP that the USB port is
attached. This communication happens through the ID pin if HD3SS3220 is configured as a DFP or DRP connect
as source. If HD3SS3220 is configured as a UFP or a DRP connected as a sink, the OUT1/OUT2 and
INT_N/OUT3 pins are used. The HD3SS3220 device exits active mode under the following conditions:
• Cable unplug
• VBUS removal if attached as a UFP
• Dead battery; system battery or supply is removed
• EN_N is floated or pulled high
7.4.3 Dead Battery
During Dead battery mode VDD5 is not available. CC pins always default to pull down resistors in dead battery
mode. Dead battery mode to means:
• HD3SS3220 in UFP with 5.1 kΩ ±20% R_(d); cable connected and providing charge.
• HD3SS3220 in UFP with 5.1 kΩ ±20% R_(d); nothing connected (application could be off or have a discharged
battery)
NOTE
When VDD5 is off, the HD3SS3220 non-failsafe pins (DIR, VBUS_DET, ADDR, OUT[3:1]
pins) could back-drive the HD3SS3220 device if not handled properly. When necessary to
pull these pins up, it is recommended to pullup DIR, ADDR, and INT_N/OUT3 to the
device’s VDD5 supply. The VBUS_DET must be pulled up to VBUS through a 900-kΩ
resistor.
7.4.4 Shutdown Mode
Shutdown mode for HD3SS3220 is defined as follows:
• Supply voltage available and EN_N pin is high or floating.
• EN_N pin has internal pullup resistor
• The HD3SS3220 device is off, but still maintains the R_(d) on the CC pins.
Copyright © 2015, Texas Instruments Incorporated
Product Folder Links: HD3SS3220
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