Analog Devices ADSP-BF506F Hardware Reference Manual page 321

Handshake MDMA Control Registers (HMDMAx_CONTROL)
15 14 13 12 11 10
0
BDI (Block Done
Interrupt Generated)
- W1C
0 - Block done interrupt
not generated
1 - Block done interrupt
generated
OI (Overflow Interrupt
Generated) - W1C
0 - Overflow interrupt
not generated
1 - Overflow interrupt
generated
PS (Pin Status) - RO
0 - Request pin is 0
1 - Request pin is 1
RBC (Force Reload of
BCOUNT) - WO
0 - Reload not active
1 - Force reload of BCOUNT with BCINIT.
Write 1 to activate
DRQ[1:0] (Default MDMA Request
When Handshake DMA is Disabled
EN=0)
00 - No request
01 - Request single transfer from MDMA channel
10 - Request multiple transfers from MDMA channel (default)
11 - Request urgent multiple transfers from MDMA channel
Figure 7-18. Handshake MDMA Control Registers
ADSP-BF50x Blackfin Processor Hardware Reference
9 8 7
0 0 0 0 0 1 0 0
Direct Memory Access
6 5 4 3 2 1 0
0 0 0 0 0 0 0
Reset = 0x0200
HMDMAEN (Handshake MDMA
Enable)
0 - Disable handshake
Operation
1 - Enable handshake
Operation
REP (HMDMA Request Polarity)
0 - Increment ECOUNT on
falling edges of DMARx
input
1 - Increment ECOUNT on
rising edges of DMARx
input
UTE (Urgency Threshold
Enable)
0 - Disable urgency threshold
1 - Enable urgency threshold
OIE (Overflow Interrupt
Enable)
0 - Disable overflow interrupt
1 - Enable overflow interrupt
BDIE (Block Done Interrupt
Enable)
0 - Disable block done interrupt
1 - Enable block done interrupt
MBDI (Mask Block Done
Interrupt)
BDIE must = 1
0 - Interrupt generated when
BCOUNT decrements to 0
1 - Interrupt generated when
BCOUNT decrements to 0
and ECOUNT = 0
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