M32C8A Datasheet, PDF (350/372 Pages) Renesas Technology Corp – RENESAS MCU M16C FAMILY / M32C/80 Series

M32C/8A Group
24. Usage Notes
24.2 Special Function Registers (SFRs)
24.2.1 100 Pin-Package
Set addresses 03CBh, 03CEh, 03CFh, 03D2h, and 03D3h to FFh after reset when using the 100-pin package.
Address 03DCh must be set to 00h after reset.
24.2.2 Register Settings
Table 24.3 lists registers containing write-only bits. Read-modify-write instructions cannot be used to set these
registers. If these registers are set using a read-modify-write instruction, undefined values are read from the
write-only bits in the register and written back to these bits. Table 24.4 lists read-modify-write instructions.
When establishing new values by modifying previous ones, write the previous values into RAM as well as to
the register. Change the contents of the RAM and then transfer the new values to the register.
Table 24.3 Registers with Write-Only Bits
Register
WDTS register
Address
000Eh
Register
U3TB register
U1BRG register
U1TB register
02E9h
02EBh to 02EAh
U2BRG register
U2TB register
U4BRG register
U4TB register
TA11 register
TA21 register
02F9h
02FBh to 02FAh
0303h, 0302h
0305h, 0304h
UDF register
TA0 register⁽¹⁾
TA1 register⁽¹⁾
TA2 register⁽¹⁾
TA41 register
DTT register
0307h, 0306h
030Ch
TA3 register⁽¹⁾
TA4 register⁽¹⁾
ICTB2 register
U3BRG register
030Dh
0329h
U0BRG register
U0TB register
NOTE:
1. In one-shot timer mode and pulse width modulation mode only.
Address
032Bh to 032Ah
0339h
033Bh to 033Ah
0344h
0347h to 0346h
0349h to 0348h
034Bh to 034Ah
034Dh to 034Ch
034Fh to 034Eh
0369h
036Bh to 036Ah
Table 24.4 Read-Modify-Write Instructions
Function
Mnemonic
Transfer
MOVDir
Bit manipulation
BCLR, BMCnd, BNOT, BSET, BTSTC, BTSTS
Shift
ROLC, RORC, ROT, SHA, SHANC, SHL, SHLNC
Arithmetic
ABS, ADC, ADCF, ADD, ADDX, DADC, DADD, DEC, DSBB, DSUB, EXTS, EXTZ, INC,
MUL, MULEX, MULU, NEG, SBB, SUB, SUBX
Logical
AND, NOT, OR, XOR
Jump
ADJNZ, SBJNZ
Rev.1.00 Jul 15, 2007 Page 333 of 352
REJ09B0385-0100