
M68HC11
REFERENCE MANUAL
INSTRUCTION SET DETAILS
MOTOROLA
A-107
TSY
Transfer from SP to Index Register Y
TSY
Operation:
IY
(SP) + $0001
Description:
Loads the index register Y with one plus the contents of the stack pointer.
The contents of the stack pointer remain unchanged. After a TSY instruction the
index register Y points at the last value that was stored on the stack.
Condition Codes and Boolean Formulae:
None affected
Source Forms:
TSY
Addressing Modes, Machine Code, and Cycle-by-Cycle Execution:
S
—
X
—
H
—
I
N
—
Z
—
V
—
C
—
—
Cycle
TSY (INH)
Data
18
30
—
—
Addr
OP
OP+1
OP+2
SP
R/W
1
1
1
1
1
2
3
4