Chapter 17 Periodic Interrupt Timer (S12PIT24B8CV2)
MC9S12XE-Family Reference Manual , Rev. 1.19
670
Freescale Semiconductor
Read: Anytime
Write: Has no meaning or effect
Module Base + 0x0016, 0x0017
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
R PCNT
15
PCNT
14
PCNT
13
PCNT
12
PCNT
11
PCNT
10
PCN
T9
PCN
T8
PCN
T7
PCN
T6
PCN
T5
PCN
T4
PCN
T3
PCN
T2
PCN
T1
PCN
T0
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 17-22. PIT Count Register 3 (PITCNT3)
Module Base + 0x001A, 0x001B
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
R PCNT
15
PCNT
14
PCNT
13
PCNT
12
PCNT
11
PCNT
10
PCN
T9
PCN
T8
PCN
T7
PCN
T6
PCN
T5
PCN
T4
PCN
T3
PCN
T2
PCN
T1
PCN
T0
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 17-23. PIT Count Register 4 (PITCNT4)
Module Base + 0x001E, 0x001F
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
R PCNT
15
PCNT
14
PCNT
13
PCNT
12
PCNT
11
PCNT
10
PCN
T9
PCN
T8
PCN
T7
PCN
T6
PCN
T5
PCN
T4
PCN
T3
PCN
T2
PCN
T1
PCN
T0
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 17-24. PIT Count Register 5 (PITCNT5)
Module Base + 0x0022, 0x0023
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
R PCNT
15
PCNT
14
PCNT
13
PCNT
12
PCNT
11
PCNT
10
PCN
T9
PCN
T8
PCN
T7
PCN
T6
PCN
T5
PCN
T4
PCN
T3
PCN
T2
PCN
T1
PCN
T0
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 17-25. PIT Count Register 6 (PITCNT6)
Module Base + 0x0026, 0x0027
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
R PCNT
15
PCNT
14
PCNT
13
PCNT
12
PCNT
11
PCNT
10
PCN
T9
PCN
T8
PCN
T7
PCN
T6
PCN
T5
PCN
T4
PCN
T3
PCN
T2
PCN
T1
PCN
T0
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 17-26. PIT Count Register 7 (PITCNT7)
Table 17-10. PITCNT0–7 Field Descriptions
Field
Description
15:0
PCNT[15:0]
PIT Count Bits 15-0
— These bits represent the current 16-bit modulus down-counter value. The read access
for the count register must take place in one clock cycle as a 16-bit access.
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