VME bus transferring system broadcasting modifiers to multiple devices and the multiple devices simultaneously receiving data synchronously to the modifiers without acknowledging the modifiers
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United States of America Patent
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-
Dec 31, 1996
Grant Date -
N/A
app pub date -
Jul 14, 1992
filing date -
Jul 14, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method for synchronous broadcasting of multiple bytes over a VME bus broadcasts multiple bytes of data across the VME bus using hardware which interfaces between the bus and attached devices. An VME address modifier code is used to identify the type of broadcast and is sent by a master device, without requiring any response from the slave devices. In a first type of broadcast an address location is transmitted over the address bus and a data message is transmitted over the data bus. In a second type of broadcast data messages are transmitted over both the data and the address buses. Multiple broadcast cycles are used to transmit the desired amount of data. An address strobe qualifies the address and data buses for a message broadcast cycle and is used by the receiving slave to clock in the message.
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