mc9s12xd256 Freescale Semiconductor, Inc, mc9s12xd256 Datasheet - Page 550

• Manufacturer Part Number: mc9s12xd256
• Description: Hcs12x Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Chapter 13 Periodic Interrupt Timer (S12PIT24B4CV1)
13.3.0.9
Read: Anytime
Write: Has no meaning or effect
550
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 13-15. PIT Count Register 0 (PITCNT0)
Figure 13-16. PIT Count Register 1 (PITCNT1)
Figure 13-17. PIT Count Register 2 (PITCNT2)
Figure 13-18. PIT Count Register 3 (PITCNT3)
Table 13-9. PITCNT0–3 Field Descriptions
PCNT
PCNT
PCNT
PCNT
MC9S12XDP512 Data Sheet, Rev. 2.17
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
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
Freescale Semiconductor
3
0
3
0
3
0
3
0
3
3
3
3
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