M16C5L_15 Datasheet, PDF (55/116 Pages) Renesas Technology Corp – RENESAS MCU

M16C/5L Group, M16C/56 Group
4. Special Function Registers (SFRs)
4.2 Notes on SFRs
4.2.1 Register Settings
Table 4.32 lists Registers with Write-Only Bits and registers whose function differs between reading and
writing. Set these registers with immediate values. Do not use read-modify-write instructions. When
establishing the next value by altering the existing value, write the existing value to the RAM as well as
to the register. Transfer the next value to the register after making changes in the RAM.
Read-modify-write instructions can be used when writing to the no register bits.
Table 4.32 Registers with Write-Only Bits
Address
Register
0249h
UART0 Bit Rate Register
024Bh to 024Ah UART0 Transmit Buffer Register
0259h
UART1 Bit Rate Register
025Bh to 025Ah UART1 Transmit Buffer Register
0269h
UART2 Bit Rate Register
026Bh to 026Ah UART2 Transmit Buffer Register
0299h
UART4 Bit Rate Register
029Bh to 029Ah UART4 Transmit Buffer Register
02A9h
UART3 Bit Rate Register
02ABh to 02AAh UART3 Transmit Buffer Register
02B6h
I2C0 Control Register 1
02B8h
I2C0 Status Register 0
0303h to 0302h Timer A1-1 Register
0305h to 0304h Timer A2-1 Register
0307h to 0306h Timer A4-1 Register
030Ah
Three-Phase Output Buffer Register 0
030Bh
Three-Phase Output Buffer Register 1
030Ch
Dead Time Timer
030Dh
Timer B2 Interrupt Generation Frequency Set Counter
0327h to 0326h Timer A0 Register
0329h to 0328h Timer A1 Register
032Bh to 032Ah Timer A2 Register
032Dh to 032Ch Timer A3 Register
032Fh to 032Eh Timer A4 Register
037Dh
Watchdog Timer Refresh Register
037Eh
Watchdog Timer Start Register
D7C9h
CAN0 Receive FIFO Pointer Control Register
D7CBh
CAN0 Transmit FIFO pointer Control Register
Symbol
U0BRG
U0TB
U1BRG
U1TB
U2BRG
U2TB
U4BRG
U4TB
U3BRG
U3TB
S3D0
S10
TA11
TA21
TA41
IDB0
IDB1
DTT
ICTB2
TA0
TA1
TA2
TA3
TA4
WDTR
WDTS
C0RFPCR
C0TFPCR
R01DS0035EJ0110 Rev.1.10
Sep 01, 2011
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