Fujitsu FR81S User Manual
FUJITSU SEMICONDUCTOR LIMITED
CONTENTS
FUJITSU SEMICONDUCTOR CONFIDENTIAL
4.2.5.
CAN Interrupt Register : INTR ............................................................................................................. 1717
4.2.6.
CAN Test Register : TESTR ................................................................................................................. 1718
4.2.7.
CAN Prescaler Extension Register : BRPER .................................................................................... 1720
4.3.
Message Interface Register ............................................................................................ 1721
4.3.1.
IFx Command Request Register : IFxCREQ ..................................................................................... 1722
4.3.2.
IFx Command Mask Register (IFxCMSK) .......................................................................................... 1724
4.3.3.
IFx Mask Registers 1, 2 : IFxMSK1, IFxMSK2 .................................................................................. 1728
4.3.4.
IFx Arbitration Registers 1, 2 : IFxARB1, IFxARB2........................................................................... 1729
4.3.5.
IFx Message Control Register : IFxMCTR ......................................................................................... 1730
4.3.6.
IFx Data Registers A1, A2, B1, B2 : IFxDTA1, IFxDTA2, IFxDTB1, IFxDTB2 ............................... 1731
4.4.
Message Object............................................................................................................... 1732
4.4.1.
Configuration of Message Object ........................................................................................................ 1733
4.4.2.
Functions of Message Object .............................................................................................................. 1734
4.5.
Message Handler Registers ............................................................................................ 1739
4.5.1.
CAN Transmission Request Registers : TREQR1 to TREQR4....................................................... 1740
4.5.2.
CAN Data Update Registers : NEWDT1 to NEWDT4 ...................................................................... 1743
4.5.3.
CAN Interrupt Pending Registers :INTPND1 to INTPND4 .............................................................. 1746
4.5.4.
CAN Message Valid Registers : MSGVAL1 to MSGVAL4 ............................................................... 1749
5.
O
PERATION
............................................................................................................................... 1752
5.1.
Message Object............................................................................................................... 1753
5.1.1.
Message Object ..................................................................................................................................... 1754
5.1.2.
Data Transmission/Reception with Message RAM ........................................................................... 1755
5.2.
Message Transmission Operation ................................................................................... 1756
5.2.1.
Message Transmission ......................................................................................................................... 1757
5.2.2.
Transmission Priority ............................................................................................................................. 1758
5.2.3.
Transmission Message Object Setting ............................................................................................... 1759
5.2.4.
Update of Transmission Message Object .......................................................................................... 1760
5.3.
Message Reception Operation ........................................................................................ 1761
5.3.1.
Reception Message Acceptance Filter ............................................................................................... 1762
5.3.2.
Reception Priority .................................................................................................................................. 1763
5.3.3.
Data Frame Reception .......................................................................................................................... 1764
5.3.4.
Remote Frame ....................................................................................................................................... 1765
5.3.5.
Reception Message Object Setting ..................................................................................................... 1766
5.3.6.
Reception Message Processing .......................................................................................................... 1767
5.4.
FIFO Buffer Function ....................................................................................................... 1768
5.4.1.
Configuration of FIFO Buffer ................................................................................................................ 1769
5.4.2.
Message Reception by FIFO Buffer .................................................................................................... 1770
5.4.3.
Reading from FIFO Buffer .................................................................................................................... 1771
5.5.
Interrupt Function ............................................................................................................ 1773
5.6.
Bit Timing and CAN System Clock (fsys) Generation ..................................................... 1774
5.7.
Test Mode ........................................................................................................................ 1777
5.7.1.
Test Mode Setting .................................................................................................................................. 1778
5.7.2.
Silent Mode ............................................................................................................................................. 1779
5.7.3.
Loopback Mode ..................................................................................................................................... 1780
5.7.4.
Combination of Silent and Loopback Modes ..................................................................................... 1781
5.7.5.
Basic Mode ............................................................................................................................................. 1782
5.7.6.
Software Control of the CAN_TX Pin .................................................................................................. 1783
5.8.
Software Initialization....................................................................................................... 1784
5.9.
CAN Wake Up Function .................................................................................................. 1785
CHAPTER 42: CAN CLOCK PRESCALER ..................................................................................... 1787
1.
O
VERVIEW
................................................................................................................................ 1788
2.
F
EATURES
................................................................................................................................. 1789
3.
C
ONFIGURATION
........................................................................................................................ 1790
4.
R
EGISTERS
............................................................................................................................... 1791
4.1.
CAN Prescaler Register : CANPRE ................................................................................ 1792
CHAPTER 43: D/A CONVERTER .................................................................................................... 1795
1.
O
VERVIEW
................................................................................................................................ 1796
MB91520 Series
MN705-00010-1v0-E
(30)