Datasheet

Chapter 17 Periodic Interrupt Timer (S12PIT24B8CV2)
MC9S12XE-Family Reference Manual Rev. 1.25
Freescale Semiconductor 671
17.4 Functional Description
Figure 17-27 shows a detailed block diagram of the PIT module. The main parts of the PIT are status,
control and data registers, two 8-bit down-counters, eight 16-bit down-counters and an interrupt/trigger
interface.
Figure 17-27. PIT24B8C Detailed Block Diagram
PITMLD0 Register
8-Bit Micro Timer 0
PITCFLMT Register
PITLD0 Register
PITMLD1 Register
8-Bit Micro Timer 1
PITMUX Register
PITCNT0 Register
Timer 0
PMUX0
PFLT0
8
8
PITTF Register
PITINTE Register
Interrupt /
Hardware
Trigger
8
Interrupt
Request
8
PITLD1 Register
PITCNT1 Register
Timer 1
[1]
PFLT1
PITLD2 Register
PITCNT2 Register
Timer 2
[2]
PFLT2
PITLD3 Register
PITCNT3 Register
Timer 3
PFLT3
time-out 0
PFLMT
[1]
[0]
PMUX
Trigger Interface
Bus
Clock
PIT24B8C
[3]
PITLD4 Register
PITCNT4 Register
Timer 4
PFLT4
time-
[4]
PITLD5 Register
PITCNT5 Register
Timer 5
PFLT5
time-out 5
[5]
PITLD6 Register
PITCNT6 Register
Timer 6
PFLT6
time-out 6
[6]
PITLD7 Register
PITCNT7 Register
Timer 7
PFLT7
time-out 7
[7]
PMUX7
out 4
time-
out 3
time-out 2
time-out 1
PITFLT Register