C8051F970-A-GM Datasheet, PDF (185/454 Pages) Silicon Laboratories – Low Power Capacitive Sensing MCU with up to 32 kB of Flash

C8051F97x
Register 20.9. SFRNEXT: SFR Page Next
Bit
7
6
5
4
3
2
1
0
Name
SFRNEXT
Type
RW
Reset
0
0
0
0
0
0
0
0
SFR Page = ALL; SFR Address: 0xF3
Table 20.10. SFRNEXT Register Bit Descriptions
Bit
Name
Function
7:0 SFRNEXT SFR Page Next.
This is the value that will go to the SFR Page register upon a return from interrupt.
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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Rev 1.0