CY7C65620

CY7C65630

Document Number: 38-08037 Rev. *Z

Page 6 of 30

The LED control lines can also be modulated with a square wave

for

power

conservation.

The

polarity

of these

pins

is

programmable, see Configuration Options on page 13.

In manual mode, the indicators are under the control of the host,

which can turn on the LEDs, or leave them off. This is done by a

USB Hub class request. Blinking of the LEDs is supported in

manual mode. The port indicators enable the user to intervene

in any error detection. For example, when babble is detected

while plugging in a defective device, or when an overcurrent

condition occurs, the port indicators corresponding to the

downstream port blink green or only light the amber LED,

respectively.

Table 2 displays the color definition of the indicators when

CY7C65620/CY7C65630 is in manual mode.[1]

Table 1. Automatic Port State to Port Indicator Color

Mapping

Downstream Facing Hub Port State

Color Definition

Port State

Off or Amber, if due to an

overcurrent condition

Powered Off

Off

Disconnected, Disabled, Not

Configured, Resetting, Testing

Green

Enabled, Transmit, or

TransmitR

Off

Suspended, Resuming,

SendEOR, Restart_E/S

Table 2. Port Indicator Color Definitions in Manual Mode

Color Definition

Port State

Off

Not operational

Amber

Error condition

Green

Fully operational

Blinking Off / Green

Software attention

Blinking Off / Amber

Hardware attention

Blinking Green / Amber

Reserved

Note

1. Information presented in <ref_note>Table 1 and <ref_note>Table 2 is from USB 2.0 specification Tables 11-6 and 11-7, respectively.