Datasheet

299
SAM9263 [DATASHEET]
Atmel-6249N-ATARM-SAM9263-Datasheet_14-Mar-16
• HS_SEL_SRC: Source Software or Hardware Handshaking Select
This register selects which of the handshaking interfaces, hardware or software, is active for source requests on this
channel.
0: Hardware handshaking interface. Software-initiated transaction requests are ignored.
1: Software handshaking interface. Hardware-initiated transaction requests are ignored.
If the source peripheral is memory, then this bit is ignored.
• LOCK_CH_L: Channel Lock Level
Indicates the duration over which DMAC_CFGx.LOCK_CH bit applies.
00: Over complete DMA transfer
01: Over complete DMA block transfer
1x: Over complete DMA transaction
• LOCK_B_L: Bus Lock Level
Indicates the duration over which DMAC_CFGx.LOCK_B bit applies.
00: Over complete DMA transfer
01: Over complete DMA block transfer
1x: Over complete DMA transaction
• LOCK_CH: Channel Lock Bit
When the channel is granted control of the master bus interface and if the DMAC_CFGx.LOCK_CH bit is asserted, then no
other channels are granted control of the master bus interface for the duration specified in DMAC_CFGx.LOCK_CH_L.
Indicates to the master bus interface arbiter that this channel wants exclusive access to the master bus interface for the
duration specified in DMAC_CFGx.LOCK_CH_L.
• LOCK_B: Bus Lock Bit
When active, the AMBA bus master signal hlock is asserted for the duration specified in DMAC_CFGx.LOCK_B_L.
•DS_HS_POL: Destination Handshaking Interface Polarity
0: Active high
1: Active low
•SR_HS_POL: Source Handshaking Interface Polarity
0: Active high
1: Active low
•MAX_ABRST: Maximum AMBA Burst Length
Maximum AMBA burst length that is used for DMA transfers on this channel. A value of ‘0’ indicates that software is not
limiting the maximum AMBA burst length for DMA transfers on this channel.
• RELOAD_SR: Automatic Source Reload
The DMAC_SARx can be automatically reloaded from its initial value at the end of every block for multi-block transfers. A
new block transfer is then initiated.