ISP1161A1BMGA STEricsson, ISP1161A1BMGA Datasheet - Page 43

• Manufacturer Part Number: ISP1161A1BMGA
• Manufacturer: STEricsson

Specifications of ISP1161A1BMGA

• Operating Temperature (max): 85C
• Operating Temperature (min): -40C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Compliant

ISP1161A1_5
Product data sheet
9.9.2.2 Wake-up by pin CS (software wake-up)
9.9.2.3 Wake-up by USB devices
During the USBSuspend state, an external microprocessor issues a chip select signal
through pin CS. This method of access to the ISP1161A1 internal registers is a software
wake-up.
For a USB bus resume, a USB device attached to the root hub port issues a resume
signal to the HC through the USB bus, switching the HC from the USBSuspend state to
the USBResume state. This will also set bit ResumeDetected of the HcInterruptStatus
register (03H to read, 83H to write).
No matter which method is used to wake up the HC from the USBSuspend state, the
corresponding interrupt bits must be enabled before the HC goes into the USBSuspend
state so that the microprocessor can receive the correct interrupt request to wake up
the HC.
Rev. 05 — 29 September 2009
USB single-chip host and device controller
ISP1161A1
© ST-ERICSSON 2009. All rights reserved.
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