R01UH0136EJ0210 Rev.2.10
Page 38 of 800
Jul 31, 2012
M16C/64A Group
4. Special Function Registers (SFRs)
4.2
Notes on SFRs
4.2.1
Register Settings
Table 4.19 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 4.19
Registers with Write-Only Bits
Address
Register
Symbol
0249h
UART0 Bit Rate Register
U0BRG
024Bh to 024Ah
UART0 Transmit Buffer Register
U0TB
0259h
UART1 Bit Rate Register
U1BRG
025Bh to 025Ah
UART1 Transmit Buffer Register
U1TB
0269h
UART2 Bit Rate Register
U2BRG
026Bh to 026Ah
UART2 Transmit Buffer Register
U2TB
0273h
SI/O3 Bit Rate Register
S3BRG
0277h
SI/O4 Bit Rate Register
S4BRG
0289h
UART5 Bit Rate Register
U5BRG
028Bh to 028Ah
UART5 Transmit Buffer Register
U5TB
0299h
UART6 Bit Rate Register
U6BRG
029Bh to 029Ah
UART6 Transmit Buffer Register
U6TB
02A9h
UART7 Bit Rate Register
U7BRG
02ABh to 02AAh
UART7 Transmit Buffer Register
U7TB
02B6h
I2C0 Control Register 1
S3D0
02B8h
I2C0 Status Register 0
S10
0303h to 0302h
Timer A1-1 Register
TA11
0305h to 0304h
Timer A2-1 Register
TA21
0307h to 0306h
Timer A4-1 Register
TA41
030Ah
Three-Phase Output Buffer Register 0
IDB0
030Bh
Three-Phase Output Buffer Register 1
IDB1
030Ch
Dead Time Timer
DTT
030Dh
Timer B2 Interrupt Generation Frequency Set Counter
ICTB2
0327h to 0326h
Timer A0 Register
TA0
0329h to 0328h
Timer A1 Register
TA1
032Bh to 032Ah
Timer A2 Register
TA2
032Dh to 032Ch
Timer A3 Register
TA3
032Fh to 032Eh
Timer A4 Register
TA4
037Dh
Watchdog Timer Refresh Register
WDTR
037Eh
Watchdog Timer Start Register
WDTS
Содержание M16C/60 Series
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