isp1160 NXP Semiconductors, isp1160 Datasheet - Page 16

• Manufacturer Part Number: isp1160
• Description: Isp1160 Embedded Universal Serial Bus Host Controller
• Manufacturer: NXP Semiconductors

Philips Semiconductors
9. Host Controller (HC)
9397 750 13963
Product data
9.1 HC’s four USB states
To re-enable the interrupt generation:
Remark: The InterruptPinEnable bit in the HcHardwareConfiguration register latches
the interrupt output. When this bit is set to logic 0, the interrupt output will remain
unchanged, regardless of any operations on the interrupt control registers.
If INT1 is asserted, and the Host Controller Driver (HCD) wishes to temporarily mask
off the INT signal without clearing the Hc PInterrupt register, the following procedure
should be followed:
To re-enable the interrupt generation:
The ISP1160’s USB HC has four USB states—USBOperational, USBReset,
USBSuspend and USBResume—that define the HC’s USB signalling and bus states
responsibilities. The signals are visible to the Host Controller Driver (HCD) via the
ISP1160 USB HC’s control registers.
1. Set all bits in the Hc PInterrupt register.
2. Set the InterruptPinEnable bit to logic 1.
1. Make sure that the InterruptPinEnable bit is set to logic 1.
2. Clear all bits in the Hc PInterruptEnable register.
3. Set the InterruptPinEnable bit to logic 0.
1. Set all bits in the Hc PInterruptEnable register according to the HCD
2. Set the InterruptPinEnable bit to logic 1.
requirements.
Rev. 05 — 24 December 2004
Embedded USB Host Controller
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
ISP1160
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