mc68hc908gr16 Freescale Semiconductor, Inc, mc68hc908gr16 Datasheet - Page 192

• Manufacturer Part Number: mc68hc908gr16
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

System Integration Module (SIM)
15.7 SIM Registers
The SIM has three memory-mapped registers.
15.7.1 Break Status Register
The break status register (BSR) contains a flag to indicate that a break caused an exit from wait mode.
This register is only used in emulation mode.
SBSW — SIM Break Stop/Wait
192
SBSW can be read within the break state SWI routine. The user can modify the return address on the
stack by subtracting one from it.
1 = Wait mode was exited by break interrupt.
0 = Wait mode was not exited by break interrupt.
CGMXCLK
INT/BREAK
IAB
Address:
Reset:
Read:
Write:
1. Writing a 0 clears SBSW.
$FE00
Bit 7
R
R
0
Figure 15-20. Stop Mode Recovery from Interrupt
Address
$FE00
$FE01
$FE03
Figure 15-21. Break Status Register (BSR)
STOP +1
= Reserved
R
6
0
MC68HC908GR16 Data Sheet, Rev. 5.0
Table 15-4. SIM Registers
R
5
0
Register
SRSR
BFCR
BSR
STOP + 2
Table 15-4
STOP RECOVERY PERIOD
R
4
0
STOP + 2
shows the mapping of these registers.
R
3
0
Access Mode
SP
User
User
User
R
2
0
SP – 1
Note
SBSW
1
0
(1)
Freescale Semiconductor
SP – 2
Bit 0
R
0
SP – 3