S912XEG384J3VA Datasheet, PDF (684/1324 Pages) Freescale Semiconductor, Inc – MC9S12XEP100 Reference Manual Covers MC9S12XE Family

Chapter 18 Periodic Interrupt Timer (S12PIT24B4CV2)
18.3.0.6 PIT Time-Out Flag Register (PITTF)
Module Base + 0x0005
7
R
0
W
Reset
0
6
5
4
3
2
0
0
0
PTF3
PTF2
0
0
0
0
0
Figure 18-8. PIT Time-Out Flag Register (PITTF)
Read: Anytime
Write: Anytime (write to clear)
1
PTF1
0
0
PTF0
0
Table 18-7. PITTF Field Descriptions
Field
3:0
PTF[3:0]
Description
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.
18.3.0.7 PIT Micro Timer Load Register 0 to 1 (PITMTLD0–1)
Module Base + 0x0006
R
W
Reset
7
PMTLD7
0
6
PMTLD6
5
PMTLD5
4
PMTLD4
3
PMTLD3
2
PMTLD2
1
PMTLD1
0
0
0
0
0
0
Figure 18-9. PIT Micro Timer Load Register 0 (PITMTLD0)
0
PMTLD0
0
Module Base + 0x0007
R
W
Reset
7
PMTLD7
0
Read: Anytime
Write: Anytime
6
PMTLD6
5
PMTLD5
4
PMTLD4
3
PMTLD3
2
PMTLD2
1
PMTLD1
0
0
0
0
0
0
Figure 18-10. PIT Micro Timer Load Register 1 (PITMTLD1)
0
PMTLD0
0
MC9S12XE-Family Reference Manual Rev. 1.25
684
Freescale Semiconductor