mc68hc908gr8b Freescale Semiconductor, Inc, mc68hc908gr8b Datasheet - Page 169

• Manufacturer Part Number: mc68hc908gr8b
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

14.7 SIM Registers
The SIM has three memory-mapped registers.
14.7.1 SIM Break Status Register
The SIM break status register (SBSR) contains a flag to indicate that a break caused an exit from wait
mode. This register is only used in emulation mode.
Freescale Semiconductor
CGMXCLK
INT/BREAK
IAB
Address:
Reset:
Note: Previous data can be operand data or the STOP opcode, depending
Read:
CPUSTOP
Write:
R/W
IDB
IAB
on the last instruction.
1. Writing a 0 clears SBSW.
$FE00
Bit 7
R
R
0
Figure 14-19. Stop Mode Recovery from Interrupt
Address
$FE00
$FE01
$FE03
Figure 14-20. Break Status Register (SBSR)
STOP ADDR
STOP +1
= Reserved
Figure 14-18. Stop Mode Entry Timing
R
6
0
MC68HC908GR8B Data Sheet, Rev. 3.0
PREVIOUS DATA
Table 14-4. SIM Registers
R
5
0
STOP ADDR + 1
Register
SBFCR
SRSR
SBSR
STOP + 2
Table 14-4
STOP RECOVERY PERIOD
NEXT OPCODE
R
4
0
STOP + 2
shows the mapping of these registers.
R
3
0
SAME
Access Mode
SP
User
User
User
R
2
0
SAME
SP – 1
Note
SBSW
SAME
1
0
(1)
SAME
SP – 2
Bit 0
R
0
SIM Registers
SP – 3
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