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14
14.3.6 Operation of RCV (Recover from Runaway)
When the RTD runs out of control, the RCV (recover from runway) command can be issued to
forcibly recover from the runaway condition without having to reset the system. The RCV command
must always be issued twice in succession. Also, any command issued subsequently after the RCV
command must have its bits 20-31 all set to 1.
RTDRXD
Note : All of 32 data bits are 1's. The RCV command must always be issued twice in succession.
Figure 14.3.10 RCV Command Data Format
RTDCLK
RTDRXD
RTDTXD
RTDACK
Indeterminate value
during runway condition
Note : The next command following the RCV command must have its bits 20-31 all set to 1.
Figure 14.3.11 Operation of the RCV Command
(LSB side)
31
20
19 18 17 16
• • • • • •
1
• • • • • •
1
(Note)
Command (RCV)
32 clock
32 clock
periods
periods
RCV
RCV
Indeterminate data during runway condition
RCV command stored here
REAL-TIME DEBUGGER (RTD)
14.3 Functional Description of the RTD
15
1
1
1
1
1
32 clock
periods
Bits 20-31
1
1 RDR (A1)
• • •
Next command following the RCV command
14-11
(MSB side)
• • • • • • • • • •
• • • • • • • • • •
(Note)
32 clock
periods
• • • • • •
D (A1)
2 clock
2 clock
periods
periods
0
1
Ver.0.10
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