Specifications

CY7C65620
CY7C65630
Document Number: 38-08037 Rev. AB Page 7 of 32
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 14.
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.
Tabl e 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.