c8051f544 Silicon Laboratories, c8051f544 Datasheet - Page 82

• Manufacturer Part Number: c8051f544
• Description: Mixed Signal Isp Flash Mcu Family
• Manufacturer: Silicon Laboratories

C8051F54x
SFR Definition 10.3. SP: Stack Pointer
SFR Address = 0x81; SFR Page = All Pages
SFR Definition 10.4. ACC: Accumulator
SFR Address = 0xE0; SFR Page = All Pages; Bit-Addressable
SFR Definition 10.5. B: B Register
SFR Address = 0xF0; SFR Page = All Pages; Bit-Addressable
82
Name
Reset
Name
Reset
Name
Reset
7:0
7:0
7:0
Bit
Bit
Bit
Type
Type
Type
Bit
Bit
Bit
ACC[7:0]
SP[7:0]
Name
Name
Name
B[7:0]
7
0
7
0
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.
Accumulator.
This register is the accumulator for arithmetic operations.
B Register.
This register serves as a second accumulator for certain arithmetic operations.
6
0
6
0
6
0
5
0
5
0
5
0
Rev. 1.0
4
0
4
0
4
0
ACC[7:0]
SP[7:0]
B[7:0]
R/W
R/W
R/W
Function
Function
Function
3
0
3
0
3
0
2
1
2
0
2
0
1
1
1
0
1
0
0
1
0
0
0
0