PXS20RM Datasheet, PDF (1243/1368 Pages) Freescale Semiconductor, Inc – PXS20 Microcontroller

Reset Generation Module (MC_RGM)
Address 0xC3FE_4002
Access: User read, Supervisor read/write, Test read/write
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R
0000000
00
W w1c w1c
w1c w1c w1c
w1c w1c
Reset^* 1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
* _{This register is reset if and only if one of thefollowing occurs:}
• Power up
• 1.2 V low-voltage detection (i.e. when the core voltage drops below the point at which the flip-flops can reliably retain
their value)
Figure 41-4. Destructive Event Status Register (RGM_DES) for cut2/3
This register contains the status of the last asserted destructive reset sources. It can be accessed in
read/write on either supervisor mode or test mode. Register bits are cleared on write ‘1’.
Table 41-4. Destructive Event Status Register (RGM_DES) Field Descriptions
Field
Description
F_POR
Flag for Power-On reset
0 No power-on event has occurred since the last clear
1 A power-on event has occurred
F_SOFT_DE Flag for software 'destructive' reset
ST (cut2/3) 0 No software 'destructive' reset event has occurred since either the last clear or the last power-on
reset assertion
1 A software 'destructive' reset event has occurred
F_LVD27_IO Flag for 2.7 V low-voltage det. (I/O)
0 No 2.7 V low-voltage det. (I/O) event has occurred since either the last clear or the last power-on
reset assertion
1 A 2.7 V low-voltage det. (I/O) event has occurred
F_LVD27_FL Flag for 2.7 V low-voltage det. (flash)
ASH
0 No 2.7 V low-voltage det. (flash) event has occurred since either the last clear or the last power-on
reset assertion
1 A 2.7 V low-voltage det. (flash) event has occurred
F_LVD27_V
REG
Flag for 2.7 V low-voltage det. (VREG)
0 No 2.7 V low-voltage det. (VREG) event has occurred since either the last clear or the last
power-on reset assertion
1 A 2.7 V low-voltage det. (VREG) event has occurred
Freescale Semiconductor
PXS20 Microcontroller Reference Manual, Rev. 1
41-11