isp1161bm NXP Semiconductors, isp1161bm Datasheet - Page 25

• Manufacturer Part Number: isp1161bm
• Description: Isp1161 Full-speed Universal Serial Bus Single-chip Host And Device Controller
• Manufacturer: NXP Semiconductors

Philips Semiconductors
9397 750 09567
Product data
The USB traffic blocks are:
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Fig 24. ISP1161 HC operating flow.
Reset
This includes hardware reset by pin RESET and software reset by the
HcSoftwareReset command (A9H). The reset function will clear all the HC’s
internal control registers to their reset status. After reset, the HCD must initialize
the ISP1161 USB HC by setting some registers.
Initialize HC
It includes:
See also
Entry
The normal entry point. The microprocessor returns to this point when there are
HC requests.
Need USB traffic
USB devices need the HC to generate USB traffic when they have USB traffic
requests such as:
To generate USB traffic, the HCD must enter the USB transaction loop.
Prepare PTD data in P system RAM
The communication channel between the HCD and ISP1161’s USB HC is in the
form of Philips Transfer Descriptor (PTD) data. The PTD data provides USB traffic
information about the commands, status, and USB data packets.
– Setting the physical size for the HC’s internal FIFO buffer RAM by setting the
– Setting the HcHardwareConfiguration register according to requirements
– Clearing interrupt events, if required
– Enabling interrupt events, if required
– Setting the HcFmInterval register (0DH - read, 8DH - write)
– Setting the HC’s root hub registers
– Setting the HcControl register to move the HC into USB Operational state.
– Connecting to or disconnecting from the downstream ports
– Issuing the Resume signal to the HC
Initialize
Reset
Entry
HcITLBufferLength register (2AH - read, AAH - write) and the
HcATLBufferLength register (2BH - read, ABH - write)
HC
USB_Operational
Section
HC state =
Rev. 02 — 13 December 2002
9.5.
HC informs HCD of
USB traffic results
Full-speed USB single-chip host and device controller
USB traffic?
Need
Exit
no
yes
HC performs USB transactions
Prepare PTD data in
P system RAM
via USB bus I/F
© Koninklijke Philips Electronics N.V. 2002. All rights reserved.
Transfer PTD data into
HC FIFO buffer RAM
ISP1161
HC interprets
PTD data
MGT948
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