c8051t623-g Silicon Laboratories, c8051t623-g Datasheet - Page 40

• Manufacturer Part Number: c8051t623-g
• Description: Full Speed Usb Eprom Mcu Family
• Manufacturer: Silicon Laboratories

SFR Definition 8.3. SP: Stack Pointer
SFR Address = 0x81
SFR Definition 8.4. ACC: Accumulator
SFR Address = 0xE0; Bit-Addressable
SFR Definition 8.5. B: B Register
SFR Address = 0xF0; Bit-Addressable
Name
Reset
Name
Reset
Name
Reset
Bit
7:0
Bit
7:0
Bit
7:0
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
6
6
0
0
0
5
0
5
0
5
0
C8051T622/3 and C8051T326/7
Rev. 1.1
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
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