M32CSLASH8B datasheet(379/406 Pages) RENESAS

379 / 406 page

Under development

M32C/8B Group

25. Usage Notes

Preliminary specification

Specifications in this manual are tentative and subject to change.

REJ09B0450-0050 Rev.0.50 Oct 31, 2008

Page 362 of 385

25.2

Special Function Registers (SFRs)

25.2.1

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.

25.2.2

Table 25.3 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 25.4 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 25.3

Registers with Write-Only Bits

NOTE:

1. In one-shot timer mode and pulse width modulation mode only.

Table 25.4

Read-Modify-Write Instructions

Address

WDTS register

000Eh

U3TB register

032Bh to 032Ah

U1BRG register

02E9h

U2BRG register

0339h

U1TB register

02EBh to 02EAh

U2TB register

033Bh to 033Ah

U4BRG register

02F9h

UDF register

0344h

U4TB register

02FBh to 02FAh

TA0 register(1)

0347h to 0346h

TA11 register

0303h to 0302h

TA1 register(1)

0349h to 0348h

TA21 register

0305h to 0304h

TA2 register(1)

034Bh to 034Ah

TA41 register

0307h to 0306h

TA3 register(1)

034Dh to 034Ch

DTT register

030Ch

TA4 register(1)

034Fh to 034Eh

ICTB2 register

030Dh

U0BRG register

0369h

U3BRG register

0329h

U0TB register

036Bh to 036Ah

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, INC,

MUL, MULEX, MULU, NEG, SBB, SUB, SUBX

Logical

AND, NOT, OR, XOR

Jump

ADJNZ, SBJNZ

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