HD3SS2521 Datasheet, PDF (7/18 Pages) Texas Instruments – DockPort Controller

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PIN I/O
19
O
20
O
28
I/O
29
I/O
21
O
22
O
23
I
25
I
O
PIN NAME
HS_SEL_OUT
SS_SEL_OUT
CONFIG_2
CONFIG_1
CHRG_OFF
MST_MODE
CHRG_DELAY
CHRG_EN#
SLEEP#
FAULT#
SYS_COM_REQ
VCTRL_SEL1
HD3SS2521
SLAS941A – APRIL 2013 – REVISED MAY 2013
PIN FUNCTIONS (continued)
DockPort HOST
(SIGNAL MUX)
DockPort DEVICE
(SIGNAL DE-MUX)
DisplayPort / High-speed USB Mux Select (Connect to HS_SEL_IN - Pin 12)
This signal in conjunction with SS_SEL_OUT is sampled at power-on or reset to
determine the voltage level supplied to a DockPort host and must be strapped to
correct logic level for the corresponding voltage level: 5 V, 12 V or 19 V.
Refer to the Power Delivery Voltage Selection table for strapping options.
After power-on/reset, this signal is driven by DockPort host to select the device
operation between DisplayPort and High-speed USB.
MM 0 = DisplayPort
MM 1 = High-speed USB
DisplayPort / SuperSpeed USB Mux Select (Connect to SS_SEL_IN - Pin 7)
This signal in conjunction with HS_SEL_OUT is sampled at power-on or reset to
determine the voltage level to be supplied to a DockPort host and must be
strapped to correct logic level for the corresponding voltage level: 5 V, 12 V or
19 V.
Refer to the Power Delivery Voltage Selection table for strapping options.
After power-on/reset, this signal is driven by DockPort host to select the device
operation between DisplayPort and SuperSpeed USB.
MM 0 = DisplayPort
MM 1 = SuperSpeed USB
DisplayPort CONFIG2/CEC
DisplayPort CONFIG1/CAD
This signal controls the power delivery —
circuit.
—
MST Mode Input from MST HUB
which indicates 2/4 DisplayPort lane
switch.
0 = 2-lane (external 10 kΩ Pull-down)
1 = 4-lane (external 10 kΩ Pull-up)
This signal controls the power delivery —
circuit.
—
This signal is the power delivery
enable for a DockPort hub.
Connect to the DockPort host sleep state —
signal.
—
Connect to the fault indicator of the
power management circuit
External 100K Pull–down required. This
signal is a sampled at power on or reset
to determine if the system is in a FW
update mode.
After power on reset, the signal is used
for communication request via a GPIO in
a DockPort host for communication
request
—
Power enable for 5 V power delivery
In additon, this signal is sampled at
power on or reset to determine the
mode of operation:
0 = DockPort hub (external 10 kΩ
Pull-down)
1 = DockPort dongle (external 10 kΩ
Pull-up)
SIGNAL
SPEED
(MAX)
Copyright © 2013, Texas Instruments Incorporated
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