Datasheet
Chapter 17 Periodic Interrupt Timer (S12PIT24B8CV2)
MC9S12XE-Family Reference Manual Rev. 1.25
Freescale Semiconductor 669
Read: Anytime
Write: Anytime
17.3.0.9 PIT Count Register 0 to 7 (PITCNT0–7)
Module Base + 0x0024, 0x0025
15 14 13 12 11 10 9876543210
R
PLD15 PLD14 PLD13 PLD12 PLD11 PLD10 PLD9 PLD8 PLD7 PLD6 PLD5 PLD4 PLD3 PLD2 PLD1 PLD0
W
Reset 0000000000000000
Figure 17-18. PIT Load Register 7 (PITLD7)
Table 17-9. PITLD0–7 Field Descriptions
Field Description
15:0
PLD[15:0]
PIT Load Bits 15:0 — These bits set the 16-bit modulus down-counter load value. Writing a new value into the
PITLD register must be a 16-bit access, to ensure data consistency. It will not restart the timer. When the timer
has counted down to zero the PTF time-out flag will be set and the register value will be loaded. The PFLT bits
in the PITFLT register can be used to immediately update the count register with the new value if an immediate
load is desired.
Module Base + 0x000A, 0x000B
15 14 13 12 11 10 9876543210
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 0000000000000000
Figure 17-19. PIT Count Register 0 (PITCNT0)
Module Base + 0x000E, 0x000F
15 14 13 12 11 10 9876543210
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 0000000000000000
Figure 17-20. PIT Count Register 1 (PITCNT1)
Module Base + 0x0012, 0x0013
15 14 13 12 11 10 9876543210
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 0000000000000000
Figure 17-21. PIT Count Register 2 (PITCNT2)