ISP1161A1BM,557 NXP Semiconductors, ISP1161A1BM,557 Datasheet - Page 25
ISP1161A1BM,557
Manufacturer Part Number
ISP1161A1BM,557
Description
Manufacturer
NXP Semiconductors
Datasheet
1.ISP1161A1BM557.pdf
(137 pages)
Specifications of ISP1161A1BM,557
Operating Temperature (max)
85C
Operating Temperature (min)
-40C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Lead Free Status / RoHS Status
Compliant
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Philips Semiconductors
9. USB host controller (HC)
9397 750 13961
Product data
Fig 23. ISP1161A1 HC USB states.
USBOperational write
9.1 HC’s four USB states
9.2 Generating USB traffic
USBSuspend write
The ISP1161A1 USB HC has four USB states USBOperational, USBReset,
USBSuspend, and USBResume
responsibilities.
The USB states are reflected in the HostControllerFunctionalState field of the
HcControl register (01H to read, 81H to write), which is located at bits 7 and 6 of the
register.
The Host Controller Driver (HCD) can perform only the USB state transitions shown
in
Remark: The Software Reset in
command. It is caused by the HostControllerReset field of the HcCommandStatus
register (02H to read, 82H to write).
USB traffic can be generated only when the ISP1161A1 USB HC is in the
USBOperational state. Therefore, the HCD must set the
HostControllerFunctionalState field of the HcControl register before generating USB
traffic.
A simplistic flow diagram showing when and how to generate USB traffic is shown in
Figure
protocol and ISP1161A1 USB HC register usage.
Figure
USBOperational
USBSuspend
24. For more detail, refer to the USB Specification Revision 2.0 about the
23.
Rev. 03 — 23 December 2004
USBResume write
remote wake-up
USBResume
or
USBOperational write
Figure 23
that define the HC’s USB signaling and bus states
USB single-chip host and device controller
is not caused by the HcSoftwareReset
USBReset write
USBReset write
USBReset write
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
hardware or software
ISP1161A1
USBReset
reset
MGT947
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