High-speed IEEE 1394 link interface
First Claim
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1. A high-speed IEEE 1394 link interface, comprising:
- a speed-selectable electrical physical layer device, said electrical physical layer device operational in three selectable speed modes, alpha, beta and fast beta modes; and
a speed-selecting link layer device in communication with said speed-selectable electrical physical layer device, said link layer device controlling said physical layer device to switch between said beta and said fast beta modes.
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Abstract
A High-speed IEEE 1394 Link Interface is disclosed. Also disclosed is an interface device and method that is compatible with legacy IEEE 1394 devices. The device is used to replace a conventional 1394 physical layer interface device and can then cooperatively operate with a slightly modified link layer controller. The device is further selectively activatable and deactivatable. When activated, the device will double the clock speed, and therefore permit data transfer rates of 1600 Megabits per second, with Control Signal transfer speeds of 200 MHz.
17 Citations
20 Claims
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1. A high-speed IEEE 1394 link interface, comprising:
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a speed-selectable electrical physical layer device, said electrical physical layer device operational in three selectable speed modes, alpha, beta and fast beta modes; and
a speed-selecting link layer device in communication with said speed-selectable electrical physical layer device, said link layer device controlling said physical layer device to switch between said beta and said fast beta modes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A Phy-Link Interface operational method, said Phy-link interface comprising a speed-selectable electrical physical layer device in communication with a speed-selecting link layer device, the method comprising the steps of:
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said link layer device setting a BMODE_LINK parameter to “
high”
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powering up said physical layer device;
programming internal registers of said physical layer device with said link layer device;
enabling said phy-link interface in BETA mode; and
said physical layer device continuously monitoring a FASTBETA bit parameter. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A high-speed IEEE 1394 link interface, comprising:
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a speed-selectable electrical physical layer device, said electrical physical layer device operational in three selectable speed modes, alpha, beta and fast beta modes; and
a speed-selecting link layer device in communication with said speed-selectable electrical physical layer device, said link layer device controlling said physical layer device to switch between said beta and said fast beta modes. - View Dependent Claims (17, 18, 19, 20)
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Specification