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ML51/ML54/ML56
Sep. 01, 2020
Page
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Rev 2.00
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ML51/M
L54
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L56
Series
Tec
hnical Reference
Manual
SP
– Stack Pointer
Register
SFR Address
Reset Value
SP
81H, All pages
0000_0111b
7
6
5
4
3
2
1
0
SP[7:0]
R/W
Bit
Name
Description
[7:0]
SP[7:0]
Stack Pointer
The Stack Pointer stores the scratch-pad RAM address where the stack begins. It is
incremented before data is stored during PUSH or CALL instructions. Note that the default
value of SP is 07H. This causes the stack to begin at location 08H.