5 Pin Configuration and Functions

4

RESERVED

3

5

6

9

10

11

12

1

8

7

CD

RSTN

EQ

D2P

D2M

ENA_HS

GND

RESERVED

VCC

D1M

D1P

2

Not to scale

Figure 5-1. TUSB211A RWB 12-Pin X2QFN (Top View)

Table 5-1. Pin Functions

PIN

TYPE(1)

INTERNAL

PULLUP/PULLDOWN

DESCRIPTION

NAME

NO.

EQ

6

I

N/A

USB High-speed EQ select via external pull down resistor.

Both edge boost and DC boost are controlled by a single pin.

Sampled upon power up. Does not recognize real time adjustments.

Auto selects EQ LEVEL = 3 when left floating.

RESERVED

11

I

500 kΩ PU

Reserved pin for TI test purposes. Leave floating or connect external

capacitor to GND for normal operation.

ENA_HS

9

I/O

N/A

After reset: Output signal ENA_HS. Flag indicating that channel is in

High-speed mode. Asserted upon:

1. Detection of USB-IF High-speed test fixture from an unconnected

state followed by transmission of USB TEST_PACKET pattern.

2. Squelch detection following USB reset with a successful HS

handshake [HS handshake is declared to be successful after single

chirp J chirp K pair where each chirp is within 18 μs – 128 μs].

D2P

7

I/O

N/A

USB High-speed positive port.

D2M

8

I/O

N/A

USB High-speed negative port.

GND

10

P

N/A

Ground

D1M

1

I/O

N/A

USB High-speed negative port.

D1P

2

I/O

N/A

USB High-speed positive port.

RESERVED

3

I/O

500 kΩ PU

1.8 MΩ PD

Reserved pin for TI test purposes. Leave floating for normal

operation.

VCC

12

P

N/A

Supply power

RSTN

5

I

500 kΩ PU

1.8 MΩ PD

Device disable/enable.

Low – Device is at reset and in shutdown, and

High - Normal operation.

Recommend 0.1-µF external capacitor to GND to ensure clean

power on reset if not driven. If the pin is driven, it must be held low

until the supply voltage for the device reaches within specifications.

CD

4

O

When RSTN asserted there is

a 500 kΩ PD

After reset: Output CD. Flag indicating that a USB device is attached

(connection detected). Asserted from an unconnected state upon

detection of DP or DM pull-up resistor. De-asserted upon detection of

disconnect.

(1)

I = input, O = output, P = power

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TUSB211A

SLLSFW2 – SEPTEMBER 2023

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