Operation Of Rcv (Recover From Runaway) - Renesas M32R/ECU Series User Manual

14
RTDCLK
RTDRXD
RTDTXD
RTDACK
RTD interrupt
Figure 14.3.9 Operation of the VEI (Interrupt Request) Command

14.3.6 Operation of RCV (Recover from Runaway)

If the RTD runs out of control, the RCV (recover from runaway) command may be issued to recover from the
runaway condition without the need to reset the system. The RCV command must always be issued twice in
succession. Also, any command issued immediately following the RCV command must have all of its bits 20–31
set to "1".
RTDRXD
Figure 14.3.10 RCV Command Data Format
32 clock 32 clock
periods periods
RDR(A1) VEI
(Note 1)
2 clock periods
Note 1: WRR command can also be used.
Notes: • (An) = Specified address
• D(An) = Data at specified address (An)
(LSB side)
31 20 19 18 17 16
1 1 1 1
Command (RCV)
Notes: • All of 32 data bits are 1's.
• The RCV command must always be issued twice in succession.
REAL TIME DEBUGGER (RTD)
14.3 Functional Description of the RTD
32 clock
periods
D (A1)
RTD interrupt request
Read value
15
1 1 1
14-8
32 clock
periods
D (A1)
Read value
(MSB side)
0
1
32180 Group User's Manual (Rev.1.0)