M30850T2-EPB User’s Manual 3. Usage (How to Use the Emulator Debugger)
REJ10J1005-0200 Rev.2.00 April 1, 2007
Explanation of the trace window (bus display)2. Trace window (bus display)right.
- 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, only “16b” for 16 bits wide bus is displayed.
- BHE*
Shows the status (0 or 1) of the BHE (Byte High Enable)
signal. If this signal = 0, the odd-address data is valid.
- BIU
Shows the status between the BIU (Bus Interface Unit) and
memory or I/O.
Disassemble display Symbol Status - No change
WAIT Executing the wait instruction
RBML Read (bytes) ML on
F Fetch
QC Discontinuous fetch
RWML Read (words) ML on
INT Interrupt acknowledge cycle
RB Read (bytes)
WB Write (bytes)
DRB Read (bytes) by DMA
DWB Write (bytes) by D MA
RW Read (words)
WW Write (words)
Source display DRW Read (words) by DMA DWW Write (words) by DMA
- 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).
- OPC
Shows the op-code size in the read data.
- OPR
Shows the code size except op-code.
- QN
Shows the byte count stored in the instruction queue buffer.
The display range is 0 to 8.
- B-T
Shows the level of the trigger signal for break event
(EXTIN7 pin of external trace signal input cable, purple).
- Q-T
Shows the level of the trigger signal for trace event
(EXTIN6 pin of external trace signal input cable, blue).
- 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.