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MT8981D Datasheet(PDF) 6 Page - Zarlink Semiconductor Inc |
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MT8981D Datasheet(HTML) 6 Page - Zarlink Semiconductor Inc |
6 / 17 page MT8981D ISO-CMOS 2-22 Figure 5 - Connection Memory High Bits Figure 6 - Connection Memory Low Bits BIT NAME DESCRIPTION 2 Message Channel When 1, the contents of the corresponding location in Connection Memory Low are output on the location’s channel and stream. When 0, the contents of the corresponding location in Connection Memory Low act as an address for the Data Memory and so determine the source of the connection to the location’s channel and stream. 1 Unused 0 Output Enable If the ODE pin is high and bit 6 of the Control Register is 0, then this bit enables the output driver for the location’s channel and stream. This allows individual channels on individual streams to be made high-impedance, allowing switching matrices to be constructed. A 1 enables the driver and a 0 disables it. BIT NAME DESCRIPTION 7 (Unused) Must be a 0. 6-5* Stream Address Bits* The number expressed in binary notation on these 2 bits is the number of the ST-BUS stream for the source of the connection. Bit 6 is the most significant bit. e.g., if bit 6 is 1, and bit 5 is 0, then the source of the connection is a channel on STi2. 4-0* Channel Address Bits* The number expressed in binary notation on these 5 bits is the number of the channel which is the source of the connection (The ST-BUS stream where the channel lies is defined by bits 6 and 5.). Bit 4 is the most significant bit. e.g., if bit 4 is 1, bit 3 is 0, bit 2 is 0, bit 1 is 1 and bit 0 is 1, then the source of the connection is channel 19. *If bit 2 of the corresponding Connection High location is 1 or if bit 6 of the Control Register is 1, then these entire 8 bits are output on the channel and stream associated with this location. Otherwise, the bits are used as indicated to define the source of the connection which is output on the channel and stream associated with this location. 76 5 4 3 2 1 0 No Corresponding Memory - These bits give 0s if read. Per Channel Control Bits 76 5 4 3 2 1 0 76 5 4 3 2 1 0 (unused) Stream Address Bits Channel Address Bits |
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Similar Description - MT8981D |
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