157
4.16 Relationship between Data Bus Widths and Control Signals
❍
16-bit data bus (using 2 DRAMs)
Figure 4.16-19 Example of Connection between MB91F109 and Two 8-Bit Output DRAMs (16-Bit Data
Bus)
This LSI
COLUMN Address
A08 A07 A06 A05 A04 A03 A02 A01 A00
ROW Address
A16 A15 A14 A13 A12 A11 A10 A09 A08
External pin
A08 A07 A06 A05 A04 A03 A02 A01 A00
A07 A06 A05 A04 A03 A02 A01 A00
RAS,CASL,WE (RAS,CAS,WEL)
D07-00
D31-24
2 DRAMs
A07 A06 A05 A04 A03 A02 A01 A00
RAS,CASH,WE (RAS,CAS,WEH)
D07-00
D23-16
( ): Values in parentheses are for 1CAS/2WE.
8
8
Summary of Contents for MB91F109
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Page 3: ...FUJITSU LIMITED FR30 32 Bit Microcontroller MB91F109 Hardware Manual ...
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Page 10: ...vi ...
Page 24: ...xx ...
Page 96: ...72 CHAPTER 2 CPU ...
Page 224: ...200 CHAPTER 4 BUS INTERFACE ...
Page 234: ...210 CHAPTER 5 I O PORTS ...
Page 268: ...244 CHAPTER 9 U TIMER ...
Page 290: ...266 CHAPTER 10 UART ...
Page 314: ...290 CHAPTER 12 16 BIT RELOAD TIMER ...
Page 322: ...298 CHAPTER 13 BIT SEARCH MODULE ...
Page 392: ...368 CHAPTER 16 FLASH MEMORY ...
Page 432: ...408 APPENDIX E Instructions F Table E 2 Instruction Formats OP rel11 5 11 ...
Page 448: ...424 APPENDIX E Instructions ...
Page 449: ...425 INDEX INDEX The index follows on the next page This is listed in alphabetic order ...
Page 458: ...434 INDEX ...
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Page 461: ...FUJITSU SEMICONDUCTOR FR30 32 Bit Microcontroller MB91F109 Hardware Manual ...