Handshake Mdma Initial Edge Count Registers; Handshake Mdma Edge Count Urgent Registers - Analog Devices ADSP-BF506F Hardware Reference Manual

DMA Registers
Handshake MDMA Current Edge Count Register (HMDMAx_ECOUNT)
15 14 13 12 11 10
0 0 0 0
Figure 7-21. Handshake MDMA Current Edge Count Registers

Handshake MDMA Initial Edge Count Registers

(HMDMAx_ECINIT)
The
HMDMAx_ECINIT
that is loaded into
number is in a signed two's complement representation.
Handshake MDMA Initial Edge Count Registers (HMDMAx_ECINIT)
15 14 13 12 11 10
0 0 0 0
Figure 7-22. Handshake MDMA Initial Edge Count Registers

Handshake MDMA Edge Count Urgent Registers

(HMDMAx_ECURGENT)
The
HMDMAx_ECURGENT
threshold. If the
this threshold, the MDMA request is urgent and might get higher
priority.
7-88
9 8 7 6 5 4
0 0 0 0 0 0 0 0
register, shown in
HMDMAx_ECOUNT
9 8 7 6 5 4
0 0 0 0 0 0 0 0
register, shown in
field in the
ECOUNT
ADSP-BF50x Blackfin Processor Hardware Reference
3 2 1 0
Reset = 0x0000
0 0 0 0
ECOUNT[15:0] (Edges
Remaining to be Serviced)
Figure 7-22, holds a signed number
when handshake DMA is enabled. This
3 2 1 0
Reset = 0x0000
0 0 0 0
ECINIT[15:0] (Initial Edge
Count)
Figure 7-23, holds the urgent
register is greater than
HMDMAx_ECOUNT