M306NKT3-RPD-E User’s Manual 3. Usage (How to Use the Emulator Debugger)
REJ10J0326-0400 Rev.4.00 Sep. 01, 2006 Page 68 of 104
3) Trace Window (Bus mode display) 4) Trace Window (Disassemble mode display)
5) Trace Window (Source mode display)
6) Trace Window (Data access mode display)
Explanation of the trace window (bus display)
Shows the status of the address bus.
- Address
Shows the status of the address bus.
- Data
Shows the status of the data bus.
- BUS
Shows the width of the external data bus. In the present
emulator, “16b” for 16-bit wide bus and “8b” for 8-bit wide
bus are displayed.
- BIU
Shows the status between the BIU (Bus Interface Unit) and
memory or I/O.
Symbol Status
- : No change (non-active)
DMA : Data access except for CPU
INT : Interrupt acknowledge cycle
IB : Instruction code read (bytes) by CPU
DB : Data access (bytes) by CPU
IW : Instruction code read (words) by CPU
DW : Data access (words) by CPU
- R/W
Shows the status of the data bus. Displayed as “R” for Read,
“W” for Write, and “-” for no access.
- RWT
This is the signal to indicate a valid bus cycle. When valid,
RWT = 0. The Address, Data, and the BIU signals are effective
when this signal is 0.
- CPU
Shows the status between the CPU and BIU (Bus Interface
Unit).
Symbol Status
CB : Op-code read (bytes)
RB : Operand read (bytes)
QC : Clears instruction queue buffer
CW : Op-code read (words)
RW : Operand read (words)
- QN
Shows the byte count stored in the instruction queue buffer.
The display range is 0 to 4.
- 76543210
Shows the level of external trace signal input cable EXTIN0 to
EXTIN7.
- h” m’ s: ms. us
Shows the elapsed time after starting the user program.