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System Interface Unit (SIU)
MPC5553/MPC5554 Microcontroller Reference Manual,
Rev. 5
Freescale Semiconductor
6-11
Address: Base + 0x000C
Access: Read[0:5, 14:16, 29:31]/Write[15, 31]
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R
PORS
ERS
LLRS
LCRS
WDRS
CRS
0
0
0
0
0
0
0
0
SSRS SERF
W
w1c
Reset
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Address: Base + 0x000C
Access: Read[0:5, 14:16, 29:31]/Write[15, 31]
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
R
WKP
CFG
2
0
0
0
0
0
0
0
0
0
0
0
0
BOOTCFG
RGF
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
U
0
1
The reset status register receives its reset values during power-on reset.
2
The reset value of the WKPCFG bit is determined by the value on the WKPCFG pin at reset.
3
The reset value of the BOOTCFG field is determined by the values on the BOOTCFG[0:1] pins at reset.
Figure 6-4. Reset Status Register (SIU_RSR)
Table 6-6. SIU_RSR Field Descriptions
Register Bit Range
Field Name
Description
0
PORS
Power-on reset status.
0 Another reset source has been acknowledged by the reset controller since the last assertion of the
power-on reset input.
1 The power-on reset input to the reset controller has been asserted and no other reset source has
been acknowledged since that assertion of the power-on reset input except an external reset.
1
ERS
External reset status.
0 The last reset source acknowledged by the reset controller was not a valid assertion of the RESET
pin.
1 The last reset source acknowledged by the reset controller was a valid assertion of the RESET pin.
2
LLRS
Loss-of-lock reset status.
0 The last reset source acknowledged by the reset controller was not a loss of PLL lock reset.
1 The last reset source acknowledged by the reset controller was a loss of PLL lock reset.
3
LCRS
Loss-of-clock reset status.
0 The last reset source acknowledged by the reset controller was not a loss-of-clock reset.
1 The last reset source acknowledged by the reset controller was a loss-of-clock reset.
4
WDRS
Watchdog timer/debug reset status.
0 The last reset source acknowledged by the reset controller was not a watchdog timer or debug reset.
1 The last reset source acknowledged by the reset controller was a watchdog timer or debug reset.
5
CRS
Checkstop reset status.
0 The last reset source acknowledged by the reset controller was not an enabled checkstop reset.
1 The last reset source acknowledged by the reset controller was an enabled checkstop reset.
6–13
Reserved.
Содержание MPC5553
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