14
14-7
Ver.0.10
REAL-TIME DEBUGGER (RTD)
14.3 Functional Description of the RTD
14.3.3 Operation of WRR (RAM Content Forcible Rewrite)
When the WRR (RAM content forcible rewrite) command is issued, the RTD forcibly rewrites the
contents of the internal RAM without causing the CPU's internal bus to stop. Because the RTD
writes data to the internal RAM while no transfers are being performed between the CPU and
internal RAM, no extra load is levied on the CPU.
The address to be read from the internal RAM can only be specified on 32-bit word boundaries.
(The two low-order address bits specified by a command are ignored.) Note also that data are
written to the internal RAM in units of 32 bits.
The external host should transmit the command and address in the first frame and then the write
data in the second frame. The timing at which the RTD writes to the internal RAM occurs in the third
frame after receiving the write data.
Figure 14.3.4 WRR Command Data Format
Note 1: X = Don't Care (However, if issued immediately after the RCV command, bits 20-31 must all be
set to 1.)
Note 2 : The specified address and write data are transferred LSB-first.
31
X
0
0
1
1
19 18 17 16
X
15
X
14 13 12
1
A16
0
X
20
A17
A28
A29
• • • • • •
• • • • • •
Command (WRR)
Specified address
• • • • • •
• • • • • •
RTDRXD
(MSB side)
(LSB side)
31
D31
1
D0
0
D30
30
D1
Write data (Note)
• • • • • • • • • • • • • • • • • •
(MSB side)
(LSB side)
• • • • • • • • • • • • • • • • • •
RTDRXD
a) First frame
b) Second frame
Summary of Contents for M32170F3VFP
Page 42: ...1 1 24 Ver 0 10 OVERVIEW 1 4 Pin Layout This is a blank page ...
Page 56: ...2 2 14 Ver 0 10 This is a blank page ...
Page 88: ...3 3 32 Ver 0 10 ADDRESS SPACE 3 7 Notes on Address Space This is a blank page ...
Page 270: ...9 9 40 Ver 0 10 DMAC 9 4 Precautions about the DMAC This is a blank page ...
Page 614: ...12 12 64 Ver 0 10 This is a blank page SERIAL I O 12 9 Precautions on Using UART Mode ...
Page 756: ...17 17 10 Ver 0 10 RAM BACKUP MODE 17 4 Exiting RAM Backup Mode Wakeup This is a blank page ...
Page 762: ...18 18 6 Ver 0 10 OSCILLATION CIRCUIT 18 2 Clock Generator Circuit This is a blank page ...
Page 831: ...CHAPTER 22 CHAPTER 22 TYPICAL CHARACTERISTICS 22 1 A D Conversion Characteristics ...
Page 833: ...Appendix 1 1 Dimensional Outline Drawing APPENDIX 1 APPENDIX 1 MECHANICAL SPECIFICATIONS ...
Page 841: ...Appendix 3 1 Precautions about Noise APPENDIX 3 APPENDIX 3 PRECAUTIONS ABOUT NOISE ...