C8051F80X_14 Datasheet, PDF (89/251 Pages) Silicon Laboratories – Mixed Signal ISP Flash MCU Family

C8051F80x-83x
SFR Definition 14.3. SP: Stack Pointer
Bit
7
6
5
4
3
2
1
0
Name
SP[7:0]
Type
R/W
Reset
0
0
0
0
0
1
1
1
SFR Address = 0x81
Bit Name
Function
7:0 SP[7:0] Stack Pointer.
The Stack Pointer holds the location of the top of the stack. The stack pointer is incre-
mented before every PUSH operation. The SP register defaults to 0x07 after reset.
SFR Definition 14.4. ACC: Accumulator
Bit
7
6
5
4
3
2
1
0
Name
ACC[7:0]
Type
R/W
Reset
0
0
0
0
0
0
0
0
SFR Address = 0xE0; Bit-Addressable
Bit Name
Function
7:0 ACC[7:0] Accumulator.
This register is the accumulator for arithmetic operations.
Rev. 1.0
89