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C8051F300 Datasheet(PDF) 22 Page - List of Unclassifed Manufacturers |
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C8051F300 Datasheet(HTML) 22 Page - List of Unclassifed Manufacturers |
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22 / 174 page  C8051F300/1/2/3/4/5 22 Rev. 2.6 Perhaps the most unique Port I/O enhancement is the Digital Crossbar. This is essentially a digital switch- ing network that allows mapping of internal digital system resources to Port I/O pins (See Figure 1.7). On- chip counter/timers, serial buses, HW interrupts, comparator output, and other digital signals in the control- ler can be configured to appear on the Port I/O pins specified in the Crossbar Control registers. This allows the user to select the exact mix of general purpose Port I/O and digital resources needed for the particular application. Figure 1.7. Digital Crossbar Diagram 1.5. Serial Ports The C8051F300/1/2/3/4/5 Family includes an SMBus/I2C interface and a full-duplex UART with enhanced baud rate configuration. Each of the serial buses is fully implemented in hardware and makes extensive use of the CIP-51's interrupts, thus requiring very little CPU intervention. XBR0, XBR1, XBR2 Registers Digital Crossbar Priority Decoder SYSCLK 2 2 Highest Priority Lowest Priority P0 I/O Cells P0.0 P0.7 8 P0MDOUT, P0MDIN Registers SMBus UART T0, T1 2 4 PCA P0 Port Latch (P0.0-P0.7) 8 CP0 Outputs 2 |
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