mc9s12xs128 Freescale Semiconductor, Inc, mc9s12xs128 Datasheet - Page 359

• Manufacturer Part Number: mc9s12xs128
• Description: Hcs12 Microcontrollers 16-bit Automotive Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

12.3.0.9
Read: Anytime
Write: Has no meaning or effect
Freescale Semiconductor
Module Base + 0x000A, 0x000B
Module Base + 0x000E, 0x000F
Module Base + 0x0012, 0x0013
Module Base + 0x0016, 0x0017
Reset
Reset
Reset
Reset
PCNT[15:0]
Field
W
W
W
W
15:0
R PCNT
R PCNT
R PCNT
R PCNT
15
15
15
15
15
15
15
15
0
0
0
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.
PIT Count Register 0 to 3 (PITCNT0–3)
PCNT
PCNT
PCNT
PCNT
14
14
14
14
14
14
14
14
0
0
0
0
PCNT
PCNT
PCNT
PCNT
13
13
13
13
13
13
13
13
0
0
0
0
PCNT
PCNT
PCNT
PCNT
12
12
12
12
12
12
12
12
0
0
0
0
Figure 12-15. PIT Count Register 0 (PITCNT0)
Figure 12-16. PIT Count Register 1 (PITCNT1)
Figure 12-17. PIT Count Register 2 (PITCNT2)
Figure 12-18. PIT Count Register 3 (PITCNT3)
Table 12-10. PITCNT0–3 Field Descriptions
S12XS Family Reference Manual, Rev. 1.10
PCNT
PCNT
PCNT
PCNT
11
11
11
11
11
11
11
11
0
0
0
0
PCNT
PCNT
PCNT
PCNT
10
10
10
10
10
10
10
10
0
0
0
0
PCNT
PCNT
PCNT
PCNT
9
0
9
0
9
0
9
0
9
9
9
9
Description
PCNT
PCNT
PCNT
PCNT
8
0
8
0
8
0
8
0
8
8
8
8
PCNT
PCNT
PCNT
PCNT
7
0
7
0
7
0
7
0
7
7
7
7
PCNT
PCNT
PCNT
PCNT
6
0
6
0
6
0
6
0
6
6
6
6
PCNT
PCNT
PCNT
PCNT
Periodic Interrupt Timer (S12PIT24B4CV1)
5
0
5
0
5
0
5
0
5
5
5
5
PCNT
PCNT
PCNT
PCNT
4
0
4
0
4
0
4
0
4
4
4
4
PCNT
PCNT
PCNT
PCNT
3
3
0
3
3
0
3
3
0
3
3
0
PCNT
PCNT
PCNT
PCNT
2
0
2
0
2
0
2
0
2
2
2
2
PCNT
PCNT
PCNT
PCNT
1
0
1
0
1
0
1
0
1
1
1
1
PCNT
PCNT
PCNT
PCNT
0
0
0
0
0
0
0
0
0
0
0
0
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