Chapter 10 XGATE (S12XGATEV3)
MC9S12XE-Family Reference Manual , Rev. 1.19
Freescale Semiconductor
357
10.3.1.1
XGATE Control Register (XGMCTL)
All module level switches and flags are located in the XGATE Module Control Register
.
Read: Anytime
Write: Anytime
Module Base +0x00000
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
R
0
0
0
0
0
0
0
0
XGE
XGFRZ XGDBG XGSS XGFACT
0
XG
SWEF
XGIE
W
XGEM
XG
FRZM
XG
DBGM
XG
SSM
XG
FACTM
XG
SWEFM
XGIEM
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
= Unimplemented or Reserved
Figure 10-3. XGATE Control Register (XGMCTL)
Table 10-2. XGMCTL Field Descriptions (Sheet 1 of 3)
Field
Description
15
XGEM
XGE Mask
— This bit controls the write access to the XGE bit. The XGE bit can only be set or cleared if a "1" is
written to the XGEM bit in the same register access.
Read:
This bit will always read "0".
Write:
0 Disable write access to the XGE in the same bus cycle
1 Enable write access to the XGE in the same bus cycle
14
XGFRZM
XGFRZ Mask
— This bit controls the write access to the XGFRZ bit. The XGFRZ bit can only be set or cleared
if a "1" is written to the XGFRZM bit in the same register access.
Read:
This bit will always read "0".
Write:
0 Disable write access to the XGFRZ in the same bus cycle
1 Enable write access to the XGFRZ in the same bus cycle
13
XGDBGM
XGDBG Mask
— This bit controls the write access to the XGDBG bit. The XGDBG bit can only be set or cleared
if a "1" is written to the XGDBGM bit in the same register access.
Read:
This bit will always read "0".
Write:
0 Disable write access to the XGDBG in the same bus cycle
1 Enable write access to the XGDBG in the same bus cycle
12
XGSSM
XGSS Mask
— This bit controls the write access to the XGSS bit. The XGSS bit can only be set or cleared if a
"1" is written to the XGSSM bit in the same register access.
Read:
This bit will always read "0".
Write:
0 Disable write access to the XGSS in the same bus cycle
1 Enable write access to the XGSS in the same bus cycle
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