Reset
MPC561/MPC563 Reference Manual, Rev. 1.2
Freescale Semiconductor
7-5
7.4
Reset Status Register (RSR)
All of the reset sources are fed into the reset controller. The 16-bit reset status register (RSR) reflects the
most recent source, or sources, of reset. (Simultaneous reset requests can cause more than one bit to be set
at the same time.) This register contains one bit for each reset source. A bit set to logic one indicates the
type of reset that occurred.
Once set, individual bits in the RSR remain set until software clears them. Bits in the RSR can be cleared
by writing a one to the bit. A write of zero has no effect on the bit. The register can be read at all times.
The reset status register receives its default reset values during power-on reset. The RSR is powered by the
KAPWR pin.
SRESET HRESET
HRESET & SRESET HRESET || SRESET
Provided only one of them is driven into the
MPC561/MPC563 at a time
MSB
0
1
2
3
4
5
6
7
8
9
10
11
12
13 14
LSB
15
Field EHRS ESRS LLRS SWRS CSRS DBHRS DBSRS JTRS OCCS ILBC GPOR GHRST GSRST
—
PORESET
0000_0000
0
1
0
1
1
1
000
HRESET
0000_0000_000
1
1
000
SRESET
0000_0000_0000
1
000
Addr
0x2F C288
1
OCCS will be set (1) if limp mode is enabled (SCCR[LME]=1).
Figure 7-1. Reset Status Register (RSR)
Table 7-3. Reset Status Register Bit Descriptions
Bits
Name
Description
0
EHRS
1
External hard reset status
0
No external hard reset has occurred
1
An external hard reset has occurred
1
ESRS
1
External soft reset status
0
No external soft reset has occurred
1
An external soft reset has occurred
2
LLRS
Loss of lock reset status
0
No enabled loss-of-lock reset has occurred
1
An enabled loss-of-lock reset has occurred
Table 7-2. Reset Configuration Word and Data Corruption/Coherency (continued)
Reset Driven
Reset to Use for Data
Coherency (EXT_RESET)
Comments
Summary of Contents for MPC561
Page 84: ...MPC561 MPC563 Reference Manual Rev 1 2 lxxxiv Freescale Semiconductor...
Page 144: ...Signal Descriptions MPC561 MPC563 Reference Manual Rev 1 2 2 46 Freescale Semiconductor...
Page 206: ...Central Processing Unit MPC561 MPC563 Reference Manual Rev 1 2 3 62 Freescale Semiconductor...
Page 302: ...Reset MPC561 MPC563 Reference Manual Rev 1 2 7 14 Freescale Semiconductor...
Page 854: ...Time Processor Unit 3 MPC561 MPC563 Reference Manual Rev 1 2 19 24 Freescale Semiconductor...
Page 968: ...Development Support MPC561 MPC563 Reference Manual Rev 1 2 23 54 Freescale Semiconductor...
Page 1144: ...Internal Memory Map MPC561 MPC563 Reference Manual Rev 1 2 B 34 Freescale Semiconductor...
Page 1212: ...TPU3 ROM Functions MPC561 MPC563 Reference Manual Rev 1 2 D 60 Freescale Semiconductor...
Page 1216: ...Memory Access Timing MPC561 MPC563 Reference Manual Rev 1 2 E 4 Freescale Semiconductor...