Chapter 7 S12 Clock, Reset and Power Management Unit (S12CPMU_UHV_V5)
S12ZVHY/S12ZVHL Family Reference Manual, Rev. 1.05
Freescale Semiconductor
241
7.3.2
Register Descriptions
This section describes all the S12CPMU_UHV_V5 registers and their individual bits.
Address order is as listed in
7.3.2.1
S12CPMU_UHV_V5 Reset Flags Register (CPMURFLG)
This register provides S12CPMU_UHV_V5 reset flags.
Read: Anytime
Write: Refer to each bit for individual write conditions
Module Base + 0x0003
7
6
5
4
3
2
1
0
R
0
PORF
LVRF
0
COPRF
0
OMRF
PMRF
W
Reset
0
Note 1
Note 2
0
Note 3
0
Note 4
Note 5
1. PORF is set to 1 when a power on reset occurs. Unaffected by System Reset.
2. LVRF is set to 1 when a low voltage reset occurs. Unaffected by System Reset. Set by power on reset.
3. COPRF is set to 1 when COP reset occurs. Unaffected by System Reset. Cleared by power on reset.
4. OMRF is set to 1 when an oscillator clock monitor reset occurs. Unaffected by System Reset. Cleared by power on reset.
5. PMRF is set to 1 when a PLL clock monitor reset occurs. Unaffected by System Reset. Cleared by power on reset.
= Unimplemented or Reserved
Figure 7-4. S12CPMU_UHV_V5 Flags Register (CPMURFLG)
Table 7-2. CPMURFLG Field Descriptions
Field
Description
6
PORF
Power on Reset Flag
—
PORF is set to 1 when a power on reset occurs. This flag can only be cleared by writing
a 1. Writing a 0 has no effect.
0 Power on reset has not occurred.
1 Power on reset has occurred.
5
LVRF
Low Voltage Reset Flag
—
LVRF is set to 1 when a low voltage reset occurs on the VDD, VDDF or VDDX
domain. This flag can only be cleared by writing a 1. Writing a 0 has no effect.
0 Low voltage reset has not occurred.
1 Low voltage reset has occurred.
3
COPRF
COP Reset Flag
—
COPRF is set to 1 when a COP (Computer Operating Properly) reset occurs. Refer to
“Computer Operating Properly Watchdog (COP) Reset
and
7.3.2.10, “S12CPMU_UHV_V5 COP Control
for details.This flag can only be cleared by writing a 1. Writing a 0 has no effect.
0 COP reset has not occurred.
1 COP reset has occurred.