176
Chapter 11 Memory Controller
8.Explanations of Registers
WTP controls the wait timing of the FLASH access in case of page hit for Page Mode FLASH. The WTP
configuration is in units of clock cycles. The value of WTP should be set to the intra page access time
(cycle time) of the FLASH memory in number of clock cycles, subtracted by one.
The setting is used if the page size PS[2:0] is set different to 0.
• BIT[29:28]: WEXH[1:0] - Minimum WEX High timing requirement
WEXH is set to 3 after reset. The minimum high time duration of WEX is 5 cycles by default.
Setting an other value reduces the WEX high time to 2 fixed WEXH.
• BIT[27:24]: WTC[3:0] - Wait cycles for FLASH memory access
WTC is set to 15 after reset.
WTC controls the wait timing of the FLASH access. The WTC configuration is in units of clock cycles.
The value of WTC should be set to the access time (cycle time) of the FLASH memory in number of clock
cycles, subtracted by one.
• BIT[23]: FRAM - Wait cycles for F-Bus general purpose RAM memory access
FRAM is set to 0 after reset.
This is a reserved bit. This version on MB91V460 has no configurable wait timing to F-Bus RAM, it op-
erates with fixed 0 wait states RAM access.
• BIT[22:20]: ATD[2:0] - Duration of the ATDIN signal for FLASH memory access
MB91V460: ATD is set to 7 after reset. ATD defaults to 4 clock cycles.
MB91F467DA: ATD is set to 5 after reset. ATD defaults to 3 clock cycles.
ATD controls the timing of the ATDIN signal for FLASH access. The ATD configuration is in units of half
clock cycles. The effective high duration of ATDIN equals to tATDIN=(ATD+1)*0.5 clock cycles.
• BIT[19:16]: EQ[3:0] - Duration of the EQIN signal for FLASH memory access
MB91V460: EQ is set to 15 after reset. EQ defaults to 8 clock cycles.
MB91F467DA: EQ is set to 13 after reset. EQ defaults to 7 clock cycles.
EQ controls the timing of the EQIN signal for FLASH access. The EQ configuration is in units of half clock
cycles. The effective high duration of EQIN equals to tEQIN=(EQ+1)*0.5 clock cycles.
• BIT[14:12]: ALEH[2:0] - Duration of the ALEH time for FLASH memory access
MB91V460: not available
MB91F467DA: ALEH is set to 5 after reset. ALEH defaults to 3 clock cycles.
ALEH controls the timing of the ATDIN falling edge to EQIN rising edge for FLASH access.
The EQ configuration is in units of half clock cycles. The effective duration of ALEH equals to
tALEH=(ALEH+1)*0.5 clock cycles.
Important remark: ALEH[2:0] is updated automatically to the same value as ATD[2:0] when writing to
ATD[2:0]. Usually the ALEH time equals the ATD time, so there is normarlly no reason to update
ALEH[2:0] in particular.
Even though it is possible to program ALEH[2:0] with a different value than ATD[2:0] by:
- Writing a different value to ALEH[2:0] after writing to ATD[2:0], or
- Setting the FMCR.LOCK bit to disable the auto update
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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