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Chapter 11 Memory Controller
1.Overview
Chapter 11 Memory Controller
1. Overview
This module combines the interfaces to the F-Bus memory resources, FLASH and General Purpose RAM (also ref-
erenced as I/D-RAM). These memories can be combined CODE and DATA storage. While code fetch is possible
in general via the F-Bus at the FR core, due to performance reasons the code fetch is accellerated by a direct I-Bus
connection in MB91460 series MCUs.
For FLASH access the interface contains an instruction cache and data read buffer. A prefetch mechanism removes
CPU internal code fetch latencies for linear code.
In addition the module includes the definition of the Fixed Mode Vector (FMV) and the Fixed Reset Vector (FRV),
depending on the device mode.
2. FLASH Interface
•
Wait timing
•
Generation of FLASH control signals ATDIN and EQIN for synchronous access.
(this version supports independent timing configuration of ADTIN, EQIN and Wait)
•
Generation of CEX, WEX and OEX
•
Handling of 32 or 64 bit read mode and 16 or 32 bit read/write mode for programming
•
Support of external SRAM for emulation devices with 1:1 timing transparency (same wait cycles)
•
Measures for FLASH macro test and parallel programming support
3. General Purpose RAM
•
Zero wait cycle access (code), one wait cycle access (data) to shared code/data memory (up to 64 kByte),
also referenced as I/D-RAM
4. Instruction Cache and Data Buffer
•
Up to 16 kByte Instruction cache (4k word entries, one way direct mapped, prefetch miss option)
•
Size configuration for the evaluation device (0, 4, 8 and 16 kB)
•
1 or 2 dword (32 or 64 bit) data read buffer (not available on MB91460 series)
5. Prefetch
•
Prefetch of consecutive instruction word address to the cache buffer
•
Prefetch is canceled in case of prefetch miss (branch or data access), thus it works without any penalties in
the prefetch miss case.
•
The FLASH macro needs to support FLASH access cycle cancelation at any point, that means it may not
affect the timing of the next complete access cycle (no special recovery condition required from previous
access cancelation).
6. Fixed Mode and Reset Vectors
•
Mode vector address: 0x000ffff8; return 0x06000000 for internal vector mode
Summary of Contents for FR Family FR60 Lite
Page 2: ...FUJITSU LIMITED ...
Page 3: ...FR60 32 BIT MICROCONTROLLER MB91460 Series User s Manual ...
Page 15: ...xi ...
Page 16: ...xii ...
Page 38: ...22 Chapter 2 MB91460 Rev A Rev B Overview 4 Block Diagram ...
Page 128: ...112 Chapter 4 CPU Architecture 9 Addressing ...
Page 153: ...137 Chapter 8 Device State Transition 3 State Transition Diagram ...
Page 154: ...138 Chapter 8 Device State Transition 3 State Transition Diagram ...
Page 169: ...153 Chapter 9 Reset 10 Caution ...
Page 170: ...154 Chapter 9 Reset 10 Caution ...
Page 180: ...164 Chapter 10 Standby 7 Q A ...
Page 182: ...166 Chapter 10 Standby 8 Caution ...
Page 199: ...183 Chapter 12 Instruction Cache 2 Main body structure Figure 2 3 I Cache Address Map ...
Page 200: ...184 Chapter 12 Instruction Cache 2 Main body structure Figure 2 4 I Cacheable Area ...
Page 222: ...206 Chapter 13 Clock Control 8 Caution ...
Page 232: ...216 Chapter 14 PLL Interface 7 Caution ...
Page 236: ...220 Chapter 15 CAN Clock Prescaler 3 Registers ...
Page 288: ...272 Chapter 19 Timebase Timer 8 Caution ...
Page 314: ...298 Chapter 22 Main Oscillation Stabilisation Timer 8 Caution ...
Page 326: ...310 Chapter 23 Sub Oscillation Stabilisation Timer 8 Caution ...
Page 348: ...332 Chapter 25 External Interrupt 8 Caution ...
Page 398: ...382 Chapter 26 DMA Controller 6 DMA External Interface ...
Page 402: ...386 Chapter 27 Delayed Interrupt 8 Caution ...
Page 412: ...396 Chapter 28 Bit Search 8 Caution ...
Page 521: ...505 Chapter 30 I O Ports 3 Port Register Settings ...
Page 522: ...506 Chapter 30 I O Ports 3 Port Register Settings ...
Page 574: ...558 Chapter 31 External Bus 4 Endian and Bus Access Byte Access ...
Page 628: ...612 Chapter 31 External Bus 13 Notes on Using the External Bus Interface ...
Page 706: ...690 Chapter 33 I2C Controller 4 Programming Flow Charts ...
Page 748: ...732 Chapter 34 CAN Controller 4 CAN Application ...
Page 762: ...746 Chapter 35 Free Run Timer 8 Caution ...
Page 790: ...774 Chapter 37 Output Compare 8 Caution ...
Page 838: ...822 Chapter 39 Programmable Pulse Generator 8 Caution ...
Page 850: ...834 Chapter 40 Pulse Frequency Modulator 4 PFM Operation and Setting ...
Page 886: ...870 Chapter 42 Sound Generator 3 Registers ...
Page 900: ...884 Chapter 43 Stepper Motor Controller 4 Caution ...
Page 939: ...923 Chapter 47 LCD Controller 3 Configuration Figure 3 2 Register List ...
Page 943: ...927 Chapter 47 LCD Controller 4 Registers Correspondence between VRAM and Common Segment Pins ...
Page 964: ...948 Chapter 48 Clock Monitor 8 Caution ...
Page 994: ...978 Chapter 51 Low Voltage Reset Interrupt 3 Registers ...
Page 998: ...982 Chapter 52 Regulator Control 3 Registers ...
Page 1008: ...992 Chapter 53 Fixed Mode Reset Vector BOOT ROM 5 Bootloader Update Strategy ...
Page 1024: ...1008 Chapter 54 Flash Memory 8 Caution ...
Page 1032: ...1016 Chapter 55 Flash Security 4 Register ...
Page 1034: ...1018 Chapter 56 Electrical Specification ...
Page 1035: ...FR60 MB91460 Series Hardware Manual European Microcontroller Design Centre Author MBo ...
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