Chapter 10 XGATE (S12XGATEV3)
MC9S12XE-Family Reference Manual , Rev. 1.19
Freescale Semiconductor
425
Operation
Unlocks a semaphore that was locked by the RISC core.
In monadic address mode, bits RS[2:0] select the semaphore to be cleared.
CCR Effects
Code and CPU Cycles
CSEM
Clear Semaphore
CSEM
N
Z
V
C
—
—
—
—
N:
Not affected.
Z:
Not affected.
V:
Not affected.
C:
Not affected.
Source Form
Address
Mode
Machine Code
Cycles
CSEM #IMM3
IMM3
0
0
0
0
0
IMM3
1
1
1
1
0
0
0
0
PA
CSEM RS
MON
0
0
0
0
0
RS
1
1
1
1
0
0
0
1
PA
Because
of
an
order
from
the
United
States
International
Trade
Commission,
BGA-packaged
product
lines
and
part
numbers
indicated
here
currently
are
not
available
from
Freescale
for
import
or
sale
in
the
United
States
prior
to
September
2010:
S12XE
products
in
208
MAPBGA
packages