7721 datasheet(497/577 Pages) RENESAS

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APPENDIX

Appendix 3. Control registers

7721 Group User’s Manual

17–34

Single transfer mode

b15

Source address register 0 (Addresses 1FC216 to 1FC016)

Source address register 1 (Addresses 1FD216 to 1FD016)

Source address register 2 (Addresses 1FE216 to 1FE016)

Source address register 3 (Addresses 1FF216 to 1FF016)

Functions

Bit

At reset

23 to 0 [Write]

Set the transfer start address of the source.

These bits can be set to “00000016” to “FFFFFF16.”

[Read]

The read value indicates the source address of data

which is next transferred.

Undefined

Note: When writing to this register, write to all 24 bits.

b23

b16

b15

Destination address register 0 (Addresses 1FC616 to 1FC416)

Destination address register 1 (Addresses 1FD616 to 1FD416)

Destination address register 2 (Addresses 1FE616 to 1FE416)

Destination address register 3 (Addresses 1FF616 to 1FF416)

Functions

Bit

At reset

23 to 0 [Write]

Set the transfer start address of the destination.

These bits can be set to “00000016” to “FFFFFF16.”

[Read]

The read value indicates the destination address of

data which is next transferred.

Undefined

Note: When writing to this register, write to all 24 bits.

b23

b16

b15

Transfer counter register 0 (Addresses 1FCA16 to 1FC816)

Transfer counter register 1 (Addresses 1FDA16 to 1FD816)

Transfer counter register 2 (Addresses 1FEA16 to 1FE816)

Transfer counter register 3 (Addresses 1FFA16 to 1FF816)

Functions

Bit

At reset

23 to 0 [Write]

Set the byte number of the transfer data.

These bits can be set to “00000116” to “FFFFFF16.”

[Read]

The read value indicates remaining byte number of

the transfer data.

Undefined

Note: When writing to this register, write to all 24 bits.

Do not set this register to “00000016.”

b23

b16

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