mc9s12xs128 Freescale Semiconductor, Inc, mc9s12xs128 Datasheet - Page 356

• Manufacturer Part Number: mc9s12xs128
• Description: Hcs12 Microcontrollers 16-bit Automotive Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Periodic Interrupt Timer (S12PIT24B4CV1)
12.3.0.6
Read: Anytime
Write: Anytime (write to clear)
12.3.0.7
Read: Anytime
Write: Anytime
356
Module Base + 0x0005
Module Base + 0x0006
Module Base + 0x0007
PTF[3:0]
Reset
Reset
Reset
Field
3:0
W
W
W
R
R
R
PMTLD7
PMTLD7
PIT Time-out Flag Bits for Timer Channel 3:0 — PTF is set when the corresponding 16-bit timer modulus
down-counter and the selected 8-bit micro timer modulus down-counter have counted to zero. The flag can be
cleared by writing a one to the flag bit. Writing a zero has no effect. If flag clearing by writing a one and flag setting
happen in the same bus clock cycle, the flag remains set. The flag bits are cleared if the PIT module is disabled
or if the corresponding timer channel is disabled.
0 Time-out of the corresponding PIT channel has not yet occurred.
1 Time-out of the corresponding PIT channel has occurred.
PIT Time-Out Flag Register (PITTF)
PIT Micro Timer Load Register 0 to 1 (PITMTLD0–1)
0
0
0
0
7
7
7
PMTLD6
PMTLD6
Figure 12-10. PIT Micro Timer Load Register 1 (PITMTLD1)
Figure 12-9. PIT Micro Timer Load Register 0 (PITMTLD0)
0
0
0
0
6
6
6
Figure 12-8. PIT Time-Out Flag Register (PITTF)
S12XS Family Reference Manual, Rev. 1.10
Table 12-7. PITTF Field Descriptions
PMTLD5
PMTLD5
0
0
0
0
5
5
5
PMTLD4
PMTLD4
0
0
0
0
4
4
4
Description
PMTLD3
PMTLD3
PTF3
0
0
0
3
3
3
PMTLD2
PMTLD2
PTF2
0
0
0
2
2
2
PMTLD1
PMTLD1
Freescale Semiconductor
PTF1
0
0
0
1
1
1
PMTLD0
PMTLD0
PTF0
0
0
0
0
0
0