M32C83T datasheet(142/527 Pages) RENESAS

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Page 119

12. DMAC

)

(

Figure 12.4 DCT0 to DCT3 Registers and DRC0 to DRC3 Registers

Function

DMAi Transfer Count Register (i=0 to 3)

Setting Range

Symbol

Address

After Reset

DCT0(2)

(CPU Internal Register)

XXXX16

DCT1(2)

(CPU Internal Register)

XXXX16

DCT2(bank1;R0)(3)

(CPU Internal Register)

000016

DCT3(bank1;R1)(4)

(CPU Internal Register)

000016

000016 to FFFF16(1)

Set the number of transfers

NOTES:

1. When the DCTi register to "000016", no data transfer occurs regardless of a DMA request.

2. Use the LDC instruction to set the DCT0 and DCT1 registers.

3. To set the DCT2 register, set the B flag in the FLG register to "1" (register bank 1) and set R0

4. To set the DCT3 register, set the B flag to "1" and set R1 register. Use the MOV instruction to

set the R1 register.

b15

b8 b7

Function

DMAi Transfer Count Reload Register (i=0 to 3)

Setting Range

Symbol

Address

After Reset

DRC0(1)

(CPU Internal Register)

XXXX16

DRC1(1)

(CPU Internal Register)

XXXX16

DRC2(bank1;R2)(2)

(CPU Internal Register)

000016

DRC3(bank1;R3)(3)

(CPU Internal Register)

000016

000016 to FFFF16

Set the number of transfers

NOTES:

1. Use the LDC instruction to set the DRC0 and DRC1 registers.

2. To set the DRC2 register, set the B flag in the FLG register to "1" (register bank 1) and set R2

3. To set the DRC3 register, set the B flag to "1" and set R3 register. Use the MOV instruction to set the

R3 register.

b15

b8 b7

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