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Chapter 29 MPU / EDSU
3.Break Functions
3. Break Functions
3.1 Instruction address break
The instruction address point break is the most basic break that occurs when an instruction is fetched at the address
specified by the break address data registers BAD[3:0]. Setting the CTC[1:0] bits of the control register BCR0 to ’00’
provides this mode. The bits EP[3:0] in BCR0 enable the break points.
Up to 4 instruction breakpoints from channels 0 to 3 can be set. All instruction break events are ORed into instruction
break exception requests to the CPU.
2 of the break address registers can operate as mask registers (BAD0, BAD2) for masking the instruction address
which is being fetched. Mask register BAD0 can be assigned either to BAD1 (same channel) or BAD2/3 (opposite
channel), mask register BAD2 can be assigned either to BAD3 or BAD0/1.
Normally Instruction break address and mask information reside in the same channel. So BAD3 contains the in-
struction break address and BAD2 the address mask information. The channel is enabled with EP3. The same ap-
plies for channel BAD1 (address), BAD0 (mask) and EP1 (enable).
But some cases require enabling point 2 (EP2) or the range function (ER1). Then BAD2 holds Instruction Address
information and could not carry the address mask. In that cases (when EP2 or ER1 are set) the mask information
is taken from the opposite BAD0 register. The same applies for EP0 and ER0 - which enables the use of the oppo-
site BAD2 register for the mask information.
Example:
CTC
00
Type: Instruction Address Break
EP1
1
Enable break point address BAD1
EM0
1
Set mask BAD0 for break address BAD1
BAD1
0x12345678
Set break address
BAD0
0x00000FFF
Set break mask
Break occurs at 0x12345000 to 0x12345FFF
On break at BAD[3:0] the respective flags BD[3:0] in the break interrupt request register BIRQ will be set to ’1’. They
have to be reset by software in the instruction break routine.
Channels 0 and 1 (BAD0, BAD1) can be set up to function as address range match. Setting the ER0 bit of the control
register BCR0 to ’1’ provides this mode. BAD0 is the lower address and BAD1 is the upper address for address
comparison. In this mode the mask register BAD2 will mask both channels 0 and 1, if the mask feature is enabled
by EM0 = ’1’.
Alternatively channels 2 and 3 (BAD2, BAD3) can be set up to function as address range match. Setting the ER1
bit of the control register BCR0 to ’1’ provides this mode. BAD2 is the lower address and BAD3 is the upper address
for address comparison. In this mode the mask register BAD0 will mask both channels 2 and 3, if the mask feature
is enabled by EM1 = ’1’.
Example:
CTC
00
Type: Instruction Address Break
EP0
1
Enable break point on BAD0
EP1
1
Enable break point on BAD1
ER0
1
Enable address range function on BAD0, BAD1
EM0
1
Enable address mask function on BAD0, BAD1
BAD0
0x12345200
Set lower break address
BAD1
0x12345300
Set upper break address
BAD2
0xF0000000
Set break mask
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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