MC68HC908GZ8 Datasheet, PDF (271/344 Pages) Motorola, Inc – Microcontrollers

Freescale Semiconductor, Inc.
System Integration Module (SIM)
SIM Registers
20.7 SIM Registers
The SIM has three memory-mapped registers. Table 20-4 shows the mapping of
these registers.
Table 20-4. SIM Registers
Address
$FE00
$FE01
$FE03
Register
SBSR
SRSR
SBFCR
Access Mode
User
User
User
20.7.1 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.
Address: $FE00
Bit 7
6
5
4
3
2
1
Bit 0
Read:
SBSW
R
Write:
R
R
R
R
R
Note⁽¹⁾
R
Reset: 0
0
0
0
0
0
0
0
R
= Reserved
1. Writing a logic 0 clears SBSW.
Figure 20-20. Break Status Register (BSR)
SBSW — SIM Break Stop/Wait
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.
MC68HC908GZ8
MOTOROLA
System Integration Module (SIM)
For More Information On This Product,
Go to: www.freescale.com
Data Sheet
271