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DSP56852 Datasheet(PDF) 11 Page - Motorola, Inc |
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DSP56852 Datasheet(HTML) 11 Page - Motorola, Inc |
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11 / 44 page  Introduction DSP56852 Technical Data 11 Preliminary C4 MISO GPIOC4 SRCK Input/Output Input/Output Input/Output SPI Master In/Slave Out (MISO)—This serial data pin is an input to a master device and an output from a slave device. The MISO line of a slave device is placed in the high- impedance state if the slave device is not selected. Port C GPIO (4)—This pin is a General Purpose I/O (GPIO) pin that can individually be programmed as input or output pin. SSI Serial Receive Clock (SRCK)—This bidirectional pin provides the serial bit rate clock for the receive section of the SSI. The clock signal can be continuous or gated. C5 MOSI GPIOC5 SRFS Input/ Output (Z) Input/Output Input/Output SPI Master Out/Slave In (MOSI)—This serial data pin is an output from a master device and an input to a slave device. The master device places data on the MOSI line a half-cycle before the clock edge that the slave device uses to latch the data. Port C GPIO (5)—This pin is a General Purpose I/O (GPIO) pin that can individually be programmed as input or output pin. SSI Serial Receive Frame Sync (SRFS)— This bidirectional pin is used to count the number of words in a frame while receiving. A programmable frame rate divider and a word length divider are used for frame rate sync signal generation. A1 IRQA Input External Interrupt Request A (IRQA)—The IRQA Schmitt trigger input is a synchronized external interrupt request that indicates that an external device is requesting service. It can be programmed to be level-sensitive or negative-edge- triggered. C2 IRQB Input External Interrupt Request B (IRQB)—The IRQB Schmitt trigger input is an external interrupt request that indicates that an external device is requesting service. It can be programmed to be level-sensitive or negative-edge- triggered. A6 EXTAL Input External Crystal Oscillator Input (EXTAL)—This input should be connected to an external crystal. If an external clock source other than a crystal oscillator is used, EXTAL must be tied off. A7 XTAL Input/Output Crystal Oscillator Output (XTAL)—This output connects the internal crystal oscillator output to an external crystal. If an external clock source other than a crystal oscillator is used, XTAL must be used as the input. Table 3. DSP56852 Signal and Package Information for the 81-pin MAPBGA Pin No. Signal Name Type Description Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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