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MB91301 Scheda tecnica(PDF) 54 Page - Fuji Electric |
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MB91301 Scheda tecnica(HTML) 54 Page - Fuji Electric |
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54 / 135 page  MB91301 Series 54 Control Registers • Cache Size Register (ISIZE) • Instruction Cache Control Register (ICHCR) The instruction cache (I-cache) control register (ICHCR) controls the operations of the instruction cache. Writing a value to the ICHCR has no effect on the caching of any instruction fetched within three cycles that follow. bit Initial value Address : 00000307H - - - - - - 10B 76 5 4 3 2 1 0 R/W ⎯ ⎯⎯ ⎯ ⎯ ⎯ SIZE1 ⎯ ⎯⎯ ⎯ ⎯ ⎯ R/W SIZE0 bit Initial value Address : 000003E7H 0 - 000000B 76 5 4 3 2 1 0 R/W ⎯ RAM GBLK ALFL EOLK ELKR FLSH ⎯ R/W R/W R/W R/W R/W R/W ENAB Address 00010000H 00010200H 00010400H 00010600H 00010800H 00010FFFH TAG RAM 00010000H 00010004H 00010008H 0001000CH 00010010H 00010014H 00014000H 00014200H 00014400H 00014600H 00014800H 00014FFFH 00018000H 00018200H 00018400H 00018600H 00018800H 00018FFFH 0001C000H 0001C200H 0001C400H 0001C600H 0001C800H 0001CFFFH Cache RAM 00018000H 00018004H 00018008H 0001800CH 00018010H 00018014H Cache off RAM off Cache off RAM on TAG1 TAG2 IRAM1 IRAM1 IRAM2 IRAM2 <TAG1> <TAG2> <IRAM1> <IRAM1> <IRAM2> IRAM1 IRAM2 IRAM1 IRAM2 <IRAM1> <IRAM2> IRAM1 IRAM2 <IRAM1> <IRAM2> <IRAM2> TAG1 TAG2 $RAM1 $RAM2 <TAG1> <TAG2> <$RAM1> <$RAM2> TAG1 TAG2 $RAM1 $RAM2 <TAG1> <TAG2> <TAG1> <TAG2> <$RAM1> <$RAM2> IRAM1 IRAM2 TAG1 TAG2 $RAM1 $RAM2 <TAG1> <TAG2> <TAG1> <TAG2> <TAG1> <TAG2> <TAG1> <TAG2> <$RAM1> <$RAM2> Cache 4 K RAM off Cache 4 K RAM on Cache 2 K RAM off Cache 2 K RAM on Cache 1 K RAM off Cache RAM on TAG1 ⋅⋅⋅TAG RAM (way1) TAG2 ⋅⋅⋅TAG RAM (way2) <> ⋅⋅⋅Mirror area RAM on/off ⋅⋅⋅RAM bit = I/O $RAM1 ⋅⋅⋅Cache RAM (way1) IRAM1 ⋅⋅⋅I-bus RAM (way1) $RAM2 ⋅⋅⋅Cache RAM (way2) IRAM1 ⋅⋅⋅I-bus RAM (way2) ←Entry at address 00x ←Mirror of 00x ←Entry at address 00x ←Mirror of 00x Instruction at address 000 (SBV0) Instruction at address 004 (SBV1) Instruction at address 008 (SBV2) Instruction at address 00C (SBV3) Instruction at address 010 (SBV0) Instruction at address 014 (SBV1) ⋅⋅⋅ |
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