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M16C/5L Group, M16C/56 Group
28.2
Notes on SFRs
28.2.1
Register Settings
Table 28.1 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 28.1
Registers with Write-Only Bits
Address
0249h
024Bh to 024Ah
0259h
025Bh to 025Ah
0269h
026Bh to 026Ah
0299h
029Bh to 029Ah
02A9h
02ABh to 02AAh
02B6h
02B8h
0303h to 0302h
0305h to 0304h
0307h to 0306h
030Ah
030Bh
030Ch
030Dh
0327h to 0326h
0329h to 0328h
032Bh to 032Ah
032Dh to 032Ch
032Fh to 032Eh
037Dh
037Eh
D7C9h
D7CBh
R01UH0127EJ0110 Rev.1.10
Sep 01, 2011
UART0 Bit Rate Register
UART0 Transmit Buffer Register
UART1 Bit Rate Register
UART1 Transmit Buffer Register
UART2 Bit Rate Register
UART2 Transmit Buffer Register
UART4 Bit Rate Register
UART4 Transmit Buffer Register
UART3 Bit Rate Register
UART3 Transmit Buffer Register
I2C0 Control Register 1
I2C0 Status Register 0
Timer A1-1 Register
Timer A2-1 Register
Timer A4-1 Register
Three-Phase Output Buffer Register 0
Three-Phase Output Buffer Register 1
Dead Time Timer
Timer B2 Interrupt Generation Frequency Set Counter
Timer A0 Register
Timer A1 Register
Timer A2 Register
Timer A3 Register
Timer A4 Register
Watchdog Timer Refresh Register
Watchdog Timer Start Register
CAN0 Receive FIFO Pointer Control Register
CAN0 Transmit FIFO pointer Control Register
Register
28. Usage Notes
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
Page 759 of 803
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