MC9S12XD256CAL Datasheet, PDF (550/1348 Pages) Freescale Semiconductor, Inc – This specification describes the function of the clocks and reset generator (CRG).

Chapter 13 Periodic Interrupt Timer (S12PIT24B4CV1)
13.3.0.9 PIT Count Register 0 to 3 (PITCNT0–3)
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
R _{PCNT PCNT PCNT PCNT PCNT PCNT PCNT PCNT PCNT PCNT PCNT PCNT PCNT PCNT PCNT PCNT}
W ¹⁵
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Reset 0
0
0
0
0
0
0000000000
Figure 13-15. PIT Count Register 0 (PITCNT0)
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
R _{PCNT PCNT PCNT PCNT PCNT PCNT PCNT PCNT PCNT PCNT PCNT PCNT PCNT PCNT PCNT PCNT}
W ¹⁵
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Reset 0
0
0
0
0
0
0000000000
Figure 13-16. PIT Count Register 1 (PITCNT1)
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
R _{PCNT PCNT PCNT PCNT PCNT PCNT PCNT PCNT PCNT PCNT PCNT PCNT PCNT PCNT PCNT PCNT}
W ¹⁵
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Reset 0
0
0
0
0
0
0000000000
Figure 13-17. PIT Count Register 2 (PITCNT2)
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
R _{PCNT PCNT PCNT PCNT PCNT PCNT PCNT PCNT PCNT PCNT PCNT PCNT PCNT PCNT PCNT PCNT}
W ¹⁵
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Reset 0
0
0
0
0
0
0000000000
Figure 13-18. PIT Count Register 3 (PITCNT3)
Read: Anytime
Write: Has no meaning or effect
Table 13-9. PITCNT0–3 Field Descriptions
Field
Description
15:0
PIT Count Bits 15-0 — These bits represent the current 16-bit modulus down-counter value. The read access
PCNT[15:0] for the count register must take place in one clock cycle as a 16-bit access.
MC9S12XDP512 Data Sheet, Rev. 2.21
550
Freescale Semiconductor