CYUSB3014 datasheet(11/38 Pages) CYPRESS

11 / 38 page

PRELIMINARY

CYUSB3014

Document Number 001-52136 Rev. *H

Page 11 of 38

Suspend Mode with

USB 3.0 PHY

Disabled (L2)

■ The power consumption in this

mode does not exceed ISB2

■ USB 3.0 PHY is disabled and

the USB interface is in

suspend mode

■ The clocks are shut off. The

PLLs are disabled

■ All I/Os maintain their previous

state

■ USB interface maintains the

previous state

■ Power supply for the wakeup

source and core power must

be retained. All other power

domains can be turned on/off

individually

■ The states of the configuration

registers, buffer memory and

all internal RAM are

maintained

■ All transactions must be

completed before EZ-USB

FX3 enters Suspend mode

(state of outstanding transac-

tions are not preserved)

■ The firmware resumes

operation from where it was

suspended (except when

woken up by RESET#

assertion) because the

program counter does not

reset

■ Firmware executing on

ARM926EJ-S core can put EZ-USB

FX3 into suspend mode. For

example, on USB suspend

condition, firmware may decide to

put EZ-USB FX3 into suspend

mode

■ External Processor, through the

use of mailbox registers can put

EZ-USB FX3 into suspend mode

■ D+ transitioning to low or high

■ D- transitioning to low or high

■ Impedance change on OTG_ID pin

■ Resume condition on SSRX +/-

■ Detection of VBUS

■ Level detect on UART_CTS

(programmable polarity)

■ GPIF II interface assertion of

CTL[0]

■ Assertion of RESET#

Table 6. Entry and Exit Methods for Low Power Modes (continued)

Low Power Mode

Characteristics

Methods of Entry

Methods of Exit

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