171
Chapter 11 Memory Controller
8.Explanations of Registers
Important remark: To maintain data consistency it is strongly recommended to disable the instruction cache while
writing to the FLASH memory and to flush the instruction cache (FLUSH=1) after completing the write procedure to
the FLASH memory.
Important remark: It is not allowed to switch between the 16 bit, the 32 bit and the 64 bit mode while reading instruc-
tions or data from the FLASH memory.
• BIT[24]: LPM - Low Power Mode
This bit is cleared after reset. The low power mode is switched off by default.
If LPM=0, CEX is permanently asserted to ’0’ (active). This enables fastest possible FLASH access timing.
Setting this bit to ’1’ enables the low power mode. CEX is asserted low only in case of FLASH access. In between
the FLASH macro is in stand-by mode.
Remark: On the MB91460 series with embedded FLASH memories it is not necessary to use this setting
since the FLASH memory supports an “automatic sleep mode” which puts the FLASH automatically in a
low power consumption state when not accessed.
FLASH Memory Control Register (FMCR)
The FMCR register is not available on the evaluation device MB91V460.
• BIT[19]: LOCK - ALEH auto-update lock
FLASH memories embedded on the MB91460 series require a certain timing between ATDIN falling edge and EQIN
rising edge. This timing is named tALEH and has usually the same length as the ATDIN duration.
By writing the setting of ATDIN length to the FMWT.ATD[2:0] bits, the FMWT2.ALEH[2:0] bits will be updated auto-
matically to the same setting. To avoid this automatic update it is possible to set the ALEH LOCK bit.
It is also possible to apply a different setting to the FMWT2.ALEH[2:0] bits by writing first to the FMWT.ATD[2:0] bits
and second to the FMWT2.ALEH[2:0] bits.
• BIT[18]: PHASE - ATDIN/EQIN clock phase
At lower core clock frequencies it can be beneficial to change the ATDIN/EQIN generation to inverted core clock to
save a waitcycle compared to the generation of these signals in phase with the core clock.
It is recommended to always refer to the setting requirements of ATDIN, EQIN and waitcycles for each product
which are provided by Fujitsu (see the related datasheets).
(PHASE setting is not available on MB91460 series)
0
Low power mode off (default)
1
Low power mode enabled
0
ALEH setting auto update is enabled (default)
1
ALEH setting auto update is disabled
0
ATDIN/EQIN generation is in phase with the core clock (default)
1
ATDIN/EQIN generation is inverted to the core clock
Содержание FR Family FR60 Lite
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Страница 3: ...FR60 32 BIT MICROCONTROLLER MB91460 Series User s Manual ...
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Страница 128: ...112 Chapter 4 CPU Architecture 9 Addressing ...
Страница 153: ...137 Chapter 8 Device State Transition 3 State Transition Diagram ...
Страница 154: ...138 Chapter 8 Device State Transition 3 State Transition Diagram ...
Страница 169: ...153 Chapter 9 Reset 10 Caution ...
Страница 170: ...154 Chapter 9 Reset 10 Caution ...
Страница 180: ...164 Chapter 10 Standby 7 Q A ...
Страница 182: ...166 Chapter 10 Standby 8 Caution ...
Страница 199: ...183 Chapter 12 Instruction Cache 2 Main body structure Figure 2 3 I Cache Address Map ...
Страница 200: ...184 Chapter 12 Instruction Cache 2 Main body structure Figure 2 4 I Cacheable Area ...
Страница 222: ...206 Chapter 13 Clock Control 8 Caution ...
Страница 232: ...216 Chapter 14 PLL Interface 7 Caution ...
Страница 236: ...220 Chapter 15 CAN Clock Prescaler 3 Registers ...
Страница 288: ...272 Chapter 19 Timebase Timer 8 Caution ...
Страница 314: ...298 Chapter 22 Main Oscillation Stabilisation Timer 8 Caution ...
Страница 326: ...310 Chapter 23 Sub Oscillation Stabilisation Timer 8 Caution ...
Страница 348: ...332 Chapter 25 External Interrupt 8 Caution ...
Страница 398: ...382 Chapter 26 DMA Controller 6 DMA External Interface ...
Страница 402: ...386 Chapter 27 Delayed Interrupt 8 Caution ...
Страница 412: ...396 Chapter 28 Bit Search 8 Caution ...
Страница 521: ...505 Chapter 30 I O Ports 3 Port Register Settings ...
Страница 522: ...506 Chapter 30 I O Ports 3 Port Register Settings ...
Страница 549: ...533 Chapter 31 External Bus 2 External Bus Interface Registers is set to the high impedance state ...
Страница 574: ...558 Chapter 31 External Bus 4 Endian and Bus Access Byte Access ...
Страница 628: ...612 Chapter 31 External Bus 13 Notes on Using the External Bus Interface ...
Страница 706: ...690 Chapter 33 I2C Controller 4 Programming Flow Charts ...
Страница 748: ...732 Chapter 34 CAN Controller 4 CAN Application ...
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Страница 838: ...822 Chapter 39 Programmable Pulse Generator 8 Caution ...
Страница 850: ...834 Chapter 40 Pulse Frequency Modulator 4 PFM Operation and Setting ...
Страница 886: ...870 Chapter 42 Sound Generator 3 Registers ...
Страница 900: ...884 Chapter 43 Stepper Motor Controller 4 Caution ...
Страница 939: ...923 Chapter 47 LCD Controller 3 Configuration Figure 3 2 Register List ...
Страница 943: ...927 Chapter 47 LCD Controller 4 Registers Correspondence between VRAM and Common Segment Pins ...
Страница 964: ...948 Chapter 48 Clock Monitor 8 Caution ...
Страница 994: ...978 Chapter 51 Low Voltage Reset Interrupt 3 Registers ...
Страница 998: ...982 Chapter 52 Regulator Control 3 Registers ...
Страница 1008: ...992 Chapter 53 Fixed Mode Reset Vector BOOT ROM 5 Bootloader Update Strategy ...
Страница 1024: ...1008 Chapter 54 Flash Memory 8 Caution ...
Страница 1032: ...1016 Chapter 55 Flash Security 4 Register ...
Страница 1034: ...1018 Chapter 56 Electrical Specification ...
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