
C8051F340/1/2/3/4/5/6/7
SFR Definition 15.1. XBR0: Port I/O Crossbar Register 0
R/W  | 
  | R/W  | R/W  | R/W  | R/W  | R/W  | R/W  | R/W  | ||
CP1AE | 
  | CP1E | CP0AE | 
  | CP0E | 
  | SYSCKE | SMB0E | SPI0E | URT0E | 
Bit7  | 
  | Bit6  | Bit5  | Bit4  | Bit3  | Bit2  | Bit1  | Bit0  | ||
Bit7:  | CP1AE: Comparator1 Asynchronous Output Enable  | 
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  | 0: Asynchronous CP1 unavailable at Port pin.  | 
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  | 1: Asynchronous CP1 routed to Port pin.  | 
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Bit6:  | CP1E: Comparator1 Output Enable  | 
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  | 0: CP1 unavailable at Port pin.  | 
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  | 1: CP1 routed to Port pin.  | 
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Bit5:  | CP0AE: Comparator0 Asynchronous Output Enable  | 
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  | 0: Asynchronous CP0 unavailable at Port pin.  | 
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  | 1: Asynchronous CP0 routed to Port pin.  | 
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Bit4:  | CP0E: Comparator0 Output Enable  | 
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  | 0: CP0 unavailable at Port pin.  | 
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  | 1: CP0 routed to Port pin.  | 
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Bit3:  | SYSCKE: /SYSCLK Output Enable  | 
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  | 0: /SYSCLK unavailable at Port pin.  | 
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  | 1: /SYSCLK output routed to Port pin.  | 
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Bit2:  | SMB0E: SMBus I/O Enable  | 
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  | 0: SMBus I/O unavailable at Port pins.  | 
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  | 1: SMBus I/O routed to Port pins.  | 
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Bit1:  | SPI0E: SPI I/O Enable  | 
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  | 0: SPI I/O unavailable at Port pins.  | 
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  | 1: SPI I/O routed to Port pins.  | 
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Bit0:  | URT0E: UART0 I/O Output Enable  | 
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  | 0: UART0 I/O unavailable at Port pins.  | 
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  | 1: UART0 TX0, RX0 routed to Port pins P0.4 and P0.5.  | 
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Reset Value
00000000
SFR Address:
0xE1
152  | Rev. 0.5 |