SuperH (SH) 64-bit RISC Series SH-5 System Architecture, Volume ...

PRELIMINARY DATA
Debug module 101
DM.TRCTL
0x100040
Field Bits Size Volatile? Synopsis Type
FF_STATUS [7:6] 2 ✓ DM FIFO status RO
Operation
When read
When written
HARD reset
Indicates the status of the DM FIFO. When the trace destination is
programmed as “DM FIFO trace hold” mode (destn == 0b00) or
“Circular DM FIFO” mode (destn == 0b11), this indicates whether
there are trace messages waiting to be read. In “Trace link mode” or
“Trace buffer mode”, this indicates whether there are trace
messages still waiting to be written to the selected trace destination.
Note:
These status bits do not show whether there are
any WPC watchpoint hits waiting in the capture
buffer. Depending on the programming of the DM
action registers, these may cause new trace
messages to be generated later.
Value - Description
0b00: DM FIFO contains some trace data.
0b01: DM FIFO is empty.
0b10: DM FIFO is full.
0b11: Undefined
Returns current value
Ignored
0b01
Table 31: DM.TRCTL definition
D R A FT
05-SA-10003 v1.0
SuperH, Inc.
SH-5 System Architecture, Volume 3: Debug