Datasheet

Section 6 PC Break Controller (PBC)
Rev. 6.00 Mar. 18, 2010 Page 157 of 982
REJ09B0054-0600
Section 6 PC Break Controller (PBC)
The PC break controller (PBC) provides functions that simplify program debugging. Using these
functions, it is easy to create a self-monitoring debugger, enabling programs to be debugged with
the chip alone, without using an in-circuit emulator. A block diagram of the PC break controller is
shown in figure 6.1.
6.1 Features
• Two break channels (A and B)
• 24-bit break address
⎯ Bit masking possible
• Four types of break compare conditions
⎯ Instruction fetch
⎯ Data read
⎯ Data write
⎯ Data read/write
• Bus master
⎯ Either CPU or CPU/DTC can be selected
• The timing of PC break exception handling after the occurrence of a break condition is as
follows:
⎯ Immediately before execution of the instruction fetched at the set address (instruction
fetch)
⎯ Immediately after execution of the instruction that accesses data at the set address (data
access)
• Module stop mode can be set