mc9s08sh8mwjr Freescale Semiconductor, Inc, mc9s08sh8mwjr Datasheet - Page 68

• Manufacturer Part Number: mc9s08sh8mwjr
• Description: S08sh 5-volt 8-bit Microcontrollers With Sci, Spi, I2c, Adc And Analog Comparators
• Manufacturer: Freescale Semiconductor, Inc

1
Chapter 5 Resets, Interrupts, and General System Control
5.7.3
This high page register contains a single write-only control bit. A serial background command such as
WRITE_BYTE must be used to write to SBDFR. Attempts to write this register from a user program are
ignored. Reads always return 0x00.
68
BDFR is writable only through serial background debug commands, not from user programs.
Reset:
BDFR
Field
Field
ILAD
LVD
3
1
0
W
R
System Background Debug Force Reset Register (SBDFR)
Illegal Address — Reset was caused by an attempt to access either data or an instruction at an unimplemented
memory address.
0 Reset not caused by an illegal address
1 Reset caused by an illegal address
Low Voltage Detect — If the LVDRE bit is set and the supply drops below the LVD trip voltage, an LVD reset will
occur. This bit is also set by POR.
0 Reset not caused by LVD trip or POR.
1 Reset caused by LVD trip or POR.
Background Debug Force Reset — A serial background command such as WRITE_BYTE can be used to allow
an external debug host to force a target system reset. Writing 1 to this bit forces an MCU reset. This bit cannot
be written from a user program.
0
0
7
Figure 5-4. System Background Debug Force Reset Register (SBDFR)
= Unimplemented or Reserved
0
0
6
Table 5-5. SBDFR Register Field Descriptions
Table 5-4. SRS Register Field Descriptions
MC9S08SH32 Series Data Sheet, Rev. 2
0
0
5
PRELIMINARY
0
0
4
Description
Description
3
0
0
0
0
2
Freescale Semiconductor
0
0
1
BDFR
0
0
0
1