MC56F8346 Freescale Semiconductor, Inc, MC56F8346 Datasheet - Page 114

• Manufacturer Part Number: MC56F8346
• Description: 56f8300 16-bit Digital Signal Controllers
• Manufacturer: Freescale Semiconductor, Inc

6.5.1.6
6.5.2
Bits in this register are set upon any system reset and are initialized only by a Power-On Reset (POR). A
reset (other than POR) will only set bits in the register; bits are not cleared. Only software should clear this
register.
6.5.2.1
This bit field is reserved or not implemented. It is read as 0 and cannot be modified by writing.
6.5.2.2
When 1, this bit indicates that the previous reset occurred as a result of a software reset (write to SW RST
bit in the SIM_CONTROL register). This bit will be cleared by any hardware reset or by software. Writing
a 0 to this bit position will set the bit, while writing a 1 to the bit will clear it.
6.5.2.3
When 1, the COPR bit indicates the Computer Operating Properly (COP) timer-generated reset has
occurred. This bit will be cleared by a Power-On Reset or by software. Writing a 0 to this bit position will
set the bit, while writing a 1 to the bit will clear it.
6.5.2.4
If 1, the EXTR bit indicates an external system reset has occurred. This bit will be cleared by a Power-On
Reset or by software. Writing a 0 to this bit position will set the bit, while writing a 1 to the bit position
will clear it. Basically, when the EXTR bit is 1, the previous system reset was caused by the external
RESET pin being asserted low.
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Base + $1
RESET
10 - The 56800E STOP instruction will not cause entry into Stop mode; STOP_DISABLE can then only be
changed by resetting the device
11 - Same operation as 10
00 - WAIT mode will be entered when the 56800E core executes a WAIT instruction
01 - The 56800E WAIT instruction will not cause entry into Wait mode; WAIT_DISABLE can be
reprogrammed in the future
10 - The 56800E WAIT instruction will not cause entry into Wait mode; WAIT_DISABLE can then only be
changed by resetting the device
11 - Same operation as 10
Read
Write
SIM Reset Status Register (SIM_RSTSTS)
Wait Disable (WAIT_DISABLE)—Bits 1–0
Reserved—Bits 15–6
Software Reset (SWR)—Bit 5
COP Reset (COPR)—Bit 4
External Reset (EXTR)—Bit 3
15
0
0
Figure 6-4 SIM Reset Status Register (SIM_RSTSTS)
14
0
0
13
O
0
12
0
0
56F8346 Technical Data, Rev. 15
11
0
0
10
0
0
9
0
0
8
0
0
7
0
0
6
0
0
SWR
5
COPR
4
EXTR
3
Freescale Semiconductor
POR
2
1
0
0
Preliminary
0
0
0