C8051F124TB Silicon Laboratories Inc, C8051F124TB Datasheet - Page 143

• Manufacturer Part Number: C8051F124TB
• Description: MCU, MPU & DSP Development Tools With C8051F124 MCU
• Manufacturer: Silicon Laboratories Inc

Specifications of C8051F124TB

• Processor To Be Evaluated: C8051F12x and C8051F13x
• Interface Type: USB
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Bits7–0: SFR Page Stack Bits: SFR page context is retained upon interrupts/return from interrupts in
Bits7–0: SFR Page Stack Bits: SFR page context is retained upon interrupts/return from interrupts in
R/W
R/W
Bit7
Bit7
a 3 byte SFR Page Stack: SFRPAGE is the first entry, SFRNEXT is the second, and SFR-
LAST 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 inter-
rupts cause pushes and pops of the SFR Page Stack.
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.
This is the value that will go to the SFR Page register upon a return from interrupt.
a 3 byte SFR Page Stack: SFRPAGE is the first entry, SFRNEXT is the second, and SFR-
LAST 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 inter-
rupts cause pushes and pops of the SFR Page Stack.
Write: Sets the SFR Page in the last entry of the SFR Stack. This will cause the SFRNEXT
SFR to have this SFR page value upon a return from interrupt.
Read: Returns the value of the SFR page contained in the last entry of the SFR stack.
R/W
R/W
Bit6
Bit6
SFR Definition 11.4. SFRNEXT: SFR Next Register
SFR Definition 11.5. SFRLAST: SFR Last Register
R/W
R/W
Bit5
Bit5
R/W
R/W
Bit4
Bit4
Rev. 1.4
R/W
R/W
Bit3
Bit3
C8051F120/1/2/3/4/5/6/7
R/W
R/W
Bit2
Bit2
C8051F130/1/2/3
R/W
R/W
Bit1
Bit1
SFR Address:
SFR Address:
SFR Page:
SFR Page:
R/W
Bit0
R/W
Bit0
0x85
All Pages
00000000
Reset Value
0x86
All Pages
00000000
Reset Value
143