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C8051F54X Datasheet(PDF) 99 Page - Silicon Laboratories |
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C8051F54X Datasheet(HTML) 99 Page - Silicon Laboratories |
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99 / 276 page  C8051F54x 98 Rev. 1.1 SFR Address = 0x85; SFR Page = All Pages SFR Definition 12.3. SFRNEXT: SFR Next Bit 7 6 5 4 3 2 1 0 Name SFRNEXT[7:0] Type R/W Reset 0 0 0 0 0 0 0 0 Bit Name Function 7:0 SFRNEXT[7:0] SFR Page Bits. This is the value that will go to the SFR Page register upon a return from inter- rupt. Write: Sets the SFR Page contained in the second byte of the SFR Stack. This will cause the SFRPAGE SFR to have this SFR page value upon a return from interrupt. Read: Returns the value of the SFR page contained in the second byte of the SFR stack. SFR page context is retained upon interrupts/return from interrupts in a 3 byte SFR Page Stack: SFRPAGE is the first entry, SFRNEXT is the second, and SFRLAST is the third entry. The SFR stack bytes may be used alter the context in the SFR Page Stack, and will not cause the stack to “push” or “pop”. Only interrupts and return from interrupts cause pushes and pops of the SFR Page Stack. |
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