Atmel Evaluation Kit AT91SAM9G25-EK AT91SAM9G25-EK Hoja De Datos

490

SAM9G25 [DATASHEET]

11032D–ATARM–10-Mar-2014

Notes: 1. USR means that the register field is manually programmed by the user.

2. CONT means that address are contiguous.

1) Single Buffer or Last 

buffer of a multiple buffer 

transfer

0

–

–

–

–

USR

0

USR

USR

USR

2) Multi Buffer transfer with 

contiguous DADDR

0

–

0

0

1

LLI

USR

LLI

CONT

LLI

3) Multi Buffer transfer with 

contiguous SADDR

0

0

–

1

0

LLI

USR

CONT

LLI

LLI

4) Multi Buffer transfer with 

LLI support

0

–

–

0

0

LLI

USR

LLI

LLI

LLI

5) Multi Buffer transfer with 

DADDR reloaded

0

–

1

0

1

LLI

USR

LLI

REP

LLI

6) Multi Buffer transfer with 

SADDR reloaded

0

1

–

1

0

LLI

USR

REP

LLI

LLI

7) Multi Buffer transfer

with BTSIZE reloaded and 

contiguous DADDR

1

–

0

0

1

REP

USR

LLI

CONT

LLI

8) Multi Buffer transfer with 

BTSIZE reloaded and 

contiguous SADDR

1

0

–

1

0

REP

USR

CONT

LLI

LLI

9) Automatic mode channel 

is stalling

BTsize is reloaded

1

0

0

1

1

REP

USR

CONT

CONT

REP

10) Automatic mode 

BTSIZE, SADDR and 

DADDR reloaded

1

1

1

1

1

REP

USR

REP

REP

REP

11) Automatic mode 

BTSIZE, SADDR reloaded 

and DADDR contiguous

1

1

0

1

1

REP

USR

REP

CONT

REP

System Memory

SADDRx

= DSCRx(0) + 0x0

DADDRx

= DSCRx(0) + 0x4

CTRLAx

= DSCRx(0) + 0x8

CTRLBx

= DSCRx(0) + 0xC

DSCRx(1)

= DSCRx(0) + 0x10

SADDRx

= DSCRx(1) + 0x0

DADDRx

= DSCRx(1) + 0x4

CTRLBx

= DSCRx(1) + 0x8

CTRLBx

= DSCRx(1) + 0xC

DSCRx(2)

= DSCRx(1) + 0x10

DSCRx(0)

DSCRx(2)
(points to 0 if
LLI(1) is the last
transfer descriptor

DSCRx(1)

LLI(0)

LLI(1)