mc56f801 Freescale Semiconductor, Inc, mc56f801 Datasheet - Page 67

• Manufacturer Part Number: mc56f801
• Description: 16-bit Digital Signal Controllers
• Manufacturer: Freescale Semiconductor, Inc

6.3.2.4
When set, this bit indicates that the previous system reset was caused by an external reset. It will only be
set if the external reset pin was asserted or remained asserted after the Power-On Reset deasserted.
6.3.2.5
This bit is set during a Power-On Reset.
6.3.2.6
This bit field is reserved or not implemented. It is read as 0 and cannot be modified by writing.
6.3.3
Only SIM_SWC0 is shown in this section. SIM_SWC1, SIM_SWC2, and SIM_SWC3 are identical in
functionality.
6.3.3.1
This register is reset only by the Power-On Reset (POR). It has no part-specific functionality and is
intended for use by a software developer to contain data that will be unaffected by the other reset sources
(RESET pin, software reset, and COP reset).
6.3.4
This read-only register displays the most significant half of the JTAG ID for the chip. This register reads
$01F2.
6.3.5
This read-only register displays the least significant half of the JTAG ID for the chip. This register reads
$401D.
Freescale Semiconductor
Preliminary
Base + $2
Base + $6
RESET
RESET
Read
Write
Read
Write
SIM Software Control Registers (SIM_SWC0, SIM_SWC1,
SIM_SWC2, and SIM_SWC3)
Most Significant Half of JTAG ID (SIM_MSHID)
Least Significant Half of JTAG ID (SIM_LSHID)
External Reset (EXTR)—Bit 3
Power-On Reset (POR)—Bit 2
Reserved—Bits 1–0
Software Control Data 0 (FIELD)—Bits 15–0
15
15
0
0
0
Figure 6-5 Most Significant Half of JTAG ID (SIM_MSHID)
Figure 6-4 SIM Software Control Register 0 (SIM_SWC0)
14
14
0
0
0
13
13
0
0
0
12
12
0
0
0
56F8014 Technical Data, Rev. 9
11
11
0
0
0
10
10
0
0
0
Software Control Data 0
9
0
9
0
0
8
8
0
1
1
7
7
0
1
1
6
6
0
1
1
5
0
5
1
1
4
0
4
1
1
3
3
0
0
0
2
0
2
0
0
Register Descriptions
1
0
1
1
1
0
0
0
0
0
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