17
17-26
Rev.1.0
(5) When Bus Mode Control Register = 1 using 8/16-bit data bus memory blocks in combination
Figure 17.4.3 shows a typical connection diagram for the microcomputer when using an 8-bit
data bus memory which is located in the CS0 area and a 16-bit data bus memory which is located
in the CS1 area. (External extension memory can only be used in external extended and
processor modes).
Figure 17.4.5 Typical Connection of External Extension Memory for the M32172 (when
BUSMOD = 1 using 8/16-bit Memory Blocks in Combination)
Note: The M32R/E address and data are comprised of bit 0 = MSB and bit 15 = LSB.
When connecting external extension memory to the chip, the MSB and the LSB sides
must be reversed.
EXTERNAL BUS INTERFACE
17.4 Example for Connecting External Extension Memory
Memory mapping
Internal flash memory
(256KB)
External memory area
(1MB)
Memory can be connected with only 2 ns data delay
when CL = 50 pF
Normally used for port function. Use WAIT only when four or more wait states are required.
H'0000 0000
H'0040 0000
H'0020 0000
H'0004 0000
Unused
H'0010 0000
1M-CS0 area
2M-CS1 area
SRAM
8-bit memory
A18
A1
D7
D0
RD
CS
max1MB
A18
A0
D15
D0
BHE
CS
WR(D0-D15)
RD(D0-D15)
max1MB
M32172F2
A12
A30
D0
D15
RD
CS0
CS1
BHE
WR
WAIT
QS32X2245
D7
D8
A B
OE
BLE
BLE
A0
8-bit bus area
Note: The QS32X2245 is a product from IDT Company.
A B
Bus wait states can be set to 1 through 4.
H'000F FFFF
External memory area
(1MB)
16-bit bus area
H'0030 0000
Ghost area
WR
Содержание 32172
Страница 20: ... This is a blank page 16 ...
Страница 21: ...1 1 Overview 1 2 Block Diagram 1 3 Pin Functions 1 4 Pin Layout CHAPTER 1 CHAPTER 1 OVERVIEW ...
Страница 44: ...1 1 24 Rev 1 0 This is a blank page Overview 1 4 Pin Layout ...
Страница 58: ...2 2 14 Rev 1 0 This is a blank page CPU 2 6 Data Formats ...
Страница 122: ...4 4 26 Rev 1 0 This is a blank page EIT 4 13 Precautions on EIT ...
Страница 200: ...7 7 6 Rev 1 0 This is a blank page RESET 7 4 Precautions to Be Taken Immediately after Reset ...
Страница 240: ...8 8 40 Rev 1 0 This is a blank page INPUT OUTPUT PORTS AND PIN FUNCTIONS 8 5 Precautions on Input Output Ports ...
Страница 298: ...9 9 58 Rev 1 0 This is a blank page DMAC 9 4 Precautions on Using DMAC ...
Страница 416: ...10 10 118 Rev 1 0 This is a blank page INPUT OUTPUT TIMERS 10 6 TOM Output Related 16 bit Timers ...
Страница 658: ...14 14 16 Rev 1 0 REAL TIME DEBUGGER RTD 14 4 Typical Connection with the Host This is a blank page ...
Страница 718: ...16 16 16 Rev 1 0 This is a blank page D A CONVERTERS 16 3 Functional Description of the D A Converters ...
Страница 766: ...18 18 22 Rev 1 0 WAIT CONTROLLER 18 3 Typical Operation of the Wait Controller This is a blank page ...
Страница 776: ...19 19 10 Rev 1 0 RAM BACKUP MODE 19 4 Exiting RAM Backup Mode Wakeup This is a blank page ...
Страница 777: ...CHAPTER 20 CHAPTER 20 OSCILLATION CIRCUIT 20 1 Oscillator Circuit 20 2 Clock Generator Circuit ...
Страница 782: ...20 20 6 Rev 1 0 OSCILLATION CIRCUIT 20 2 Clock Generator Circuit This is a blank page ...
Страница 856: ...23 23 26 Rev 1 0 This is a blank page ELECTRICAL CHARACTERISTICS 23 6 AC Characteristics ...
Страница 857: ...24 1 A D Conversion Characteristics CHAPTER 24 CHAPTER 24 STANDARD CHARACTERISTICS ...
Страница 859: ...Appendix 1 1 Dimensional Outline Drawing APPENDIX 1 APPENDIX 1 MECHANICAL SPECIFICATIONS ...
Страница 861: ...Appendix 2 1 M32R E Instruction Processing Time APPENDIX 2 APPENDIX 2 INSTRUCTION PROCESSING TIME ...
Страница 865: ...Appendix 3 1 Precautions about Noise APPENDIX 3 APPENDIX 3 PRECAUTIONS ABOUT NOISE ...