525
Chapter 31 External Bus
2.External Bus Interface Registers
[Bits 2] W02 (Address -> CSn Delay)
The address -> CSn delay setting is made when a certain type of setup is required for the address when CSn
falls or CSn edges are needed for successive accesses to the same chip select area.
Set the address and set the delay from AS output to CS0-CS7 output.
If no delay is selected by setting 0, assertion of CS0-CS7 starts at the same timing that AS is asserted. If, at this
point, successive accesses are made to the same chip select area, assertion of CS0-CS7 without change
between two access operations may continue.
If delay is specified by selecting 1, assertion of CS0-CS7 starts when the external clock memory MCLK output
rises. If, at this point, successive accesses are made to the same chip select area, CS0-CS7 are negated at a
timing between two access operations. If CS delay is selected, one setup cycle is inserted before asserting the
read/write strobe after assertion of the delayed CSn (operation is the same as the CSn ->RD/WE setup setting of
W01).
The address -> CSn delay setting works for DACK signal (basic mode) output to the same area in the same way.
DACK output in basic mode has the same waveforms as those of CS output to the same area.
[Bits 1] W01 (CSn -> RD/WRn Setup Extension Cycle)
The CSn -> RD/WRn setup extension cycle is set to extend the period before the read/write strobe is asserted
after CSn is asserted. At least one setup extension cycle is inserted before the read/write strobe is asserted
after CS is asserted.
If 0 cycle is selected by setting 0, RD/WR0-WR3/WRn are output at the earliest when external clock MCLK output
rises just after CS is asserted. WR0-WR3/WRn may be delayed one cycle or more depending on the internal bus
state.
If 1 cycle is selected by setting 1, RD/WR0-WR3/WRn are always output 1 cycle or more later.
When successive accesses are made within the same chip select area without negating CSn, a setup extension
cycle is not inserted. If a setup extension cycle for determining the address is required, set the W02 bit and insert
the address -> CSn delay.
Since CSn is negated for each access operation, the setup extension cycle is
enabled.
If the CSn delay set by W02 is inserted, this setup cycle is always enabled regardless of the setting of the W01
bit.
W02
Address -> CSn delay
0
No delay
1
Delay
W01
CSn -> RD/WRn setup delay cycle
0
0 cycle
1
1 cycle
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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