S912XEG128J2MAA Datasheet, PDF (671/1324 Pages) Freescale Semiconductor, Inc – Microcontrollers

Chapter 17 Periodic Interrupt Timer (S12PIT24B8CV2)
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.
Bus
Clock
PITFLT Register
8
PFLT0
PMUX0
8
Timer 0
PITLD0 Register
PITMUX Register
PITCNT0 Register
PITMLD0 Register
8-Bit Micro Timer 0
[0]
PFLT1
[1]
Timer 1
PITLD1 Register
PITCNT1 Register
PITMLD1 Register
8-Bit Micro Timer 1
[1]
PITCFLMT Register
PFLMT
PFLT2
[2]
Timer 2
PITLD2 Register
PITCNT2 Register
PFLT3
[3]
Timer 3
PITLD3 Register
PITCNT3 Register
PFLT4
[4]
Timer 4
PITLD4 Register
PITCNT4 Register
PFLT5
[5]
Timer 5
PITLD5 Register
PITCNT5 Register
PFLT6
[6]
Timer 6
PITLD6 Register
PITCNT6 Register
PMUX7
PFLT7
[7]
Timer 7
PITLD7 Register
PITCNT7 Register
PIT24B8C
time-out 0
time-out 1
time-out 2
time-
out 3
Interrupt /
Trigger Interface
time-
out 4
PITTF Register
PITINTE Register
8
Hardware
Trigger
8
Interrupt
Request
time-out 5
time-out 6
time-out 7
Figure 17-27. PIT24B8C Detailed Block Diagram
MC9S12XE-Family Reference Manual Rev. 1.25
Freescale Semiconductor
671