700
Chapter 34 CAN Controller
2.Register Description
The LEC field holds a code which indicates the type of the last error to occur on the CAN bus. This field will be
cleared to ‘0’ when a message has been transferred (reception or transmission) without error. The unused
code ‘7’ may be written by the CPU to check for updates.
■
Status Interrupts
A Status Interrupt is generated by bits BOff and EWarn (Error Interrupt) or by RxOk, TxOk, and LEC (Status
Change Interrupt) assumed that the corresponding enable bits in the CAN Control Register are set. A change
of bit EPass or a write to RxOk, TxOk,or LEC will never generate a Status Interrupt.
Reading the Status Register will clear the Status Interrupt value (8000h) in the Interrupt Register, if it is
pending.
■
Error Counter (ERRCNT)
5
Bit0Error
During the transmission of a message (or acknowledge bit or active
error flag, or overload flag), the device wanted to send a dominant
level (data or identifier bit logical value ‘0’), but the monitored Bus
value was recessive. During busoff recovery this status is set each
time a sequence of 11 recessive bits has been monitored. This
enables the CPU to monitor the proceeding of the busoff recovery
sequence (indicating the bus is not stuck at dominant or continuously
disturbed).
6
CRCError
The CRC check sum was incorrect in the message received, the
CRC received for an incoming message does not match with the cal-
culated CRC for the received data.
7
unused
When the LEC shows the value ‘7’, no CAN bus event was detected
since the CPU wrote this value to the LEC.
RP
REC6-0
⇐
Bit no.
Read/write
⇒
(R)
(R)
(R)
(R)
(R)
(R)
(R)
(R)
Default value
⇒
(0)
(0)
(0)
(0)
(0)
(0)
(0)
(0)
Error Counter high byte
Address : Base + 0x04
H
15
14
13
12
11
10
9
8
ERRCNTH
TEC7-0
⇐
Bit no.
Read/write
⇒
(R)
(R)
(R)
(R)
(R)
(R)
(R)
(R)
Default value
⇒
(0)
(0)
(0)
(0)
(0)
(0)
(0)
(0)
Address : Base + 0x05
H
7
6
5
4
3
2
1
0
ERRCNTL
Error Counter low byte
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 ...
Page 1036: ......
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