SAM9N12 Datasheet, PDF (533/1137 Pages) ATMEL Corporation – The ARM926EJ-S based SAM9CN12 features the frequently requested combination of user...

SAM9N12/SAM9CN11/SAM9CN12
• DST_PER_MSB: DST_PER Most Significant Bits
This field indicates the Most Significant bits of the DST_PER field.
• SOD: Stop On Done
0 (DISABLE): STOP ON DONE disabled, the descriptor fetch operation ignores DONE Field of CTRLA register.
1 (ENABLE): STOP ON DONE activated, the DMAC module is automatically disabled if DONE FIELD is set to 1.
• LOCK_IF: Interface Lock
0 (DISABLE): Interface Lock capability is disabled
1 (ENABLE): Interface Lock capability is enabled
• LOCK_B: Bus Lock
0 (DISABLE): AHB Bus Locking capability is disabled.
1(ENABLE): AHB Bus Locking capability is enabled.
• LOCK_IF_L: Master Interface Arbiter Lock
0 (CHUNK): The Master Interface Arbiter is locked by the channel x for a chunk transfer.
1 (BUFFER): The Master Interface Arbiter is locked by the channel x for a buffer transfer.
• AHB_PROT: AHB Protection
AHB_PROT field provides additional information about a bus access and is primarily used to implement some level of
protection.
HPROT[3]
AHB_PROT[2]
HPROT[2]
AHB_PROT[1]
HPROT[1]
AHB_PROT[0]
HPROT[0]
1
Description
Data access
0: User Access
1: Privileged Access
0: Not Bufferable
1: Bufferable
0: Not cacheable
1: Cacheable
• FIFOCFG: FIFO Configuration
Value
00
01
10
Name
ALAP_CFG
HALF_CFG
ASAP_CFG
Description
The largest defined length AHB burst is performed on the destination AHB interface.
When half FIFO size is available/filled, a source/destination request is serviced.
When there is enough space/data available to perform a single AHB access, then the
request is serviced.
11063G–ATARM–09-Oct-12
533