W90P710_05 Datasheet, PDF (166/526 Pages) Winbond – 16/32-bit ARM microcontroller

W90P710
Continued
BITS
[13:12]
[11]
[10]
[9]
[8]
[7]
[6]
[5]
TWS
SBMS
Reserved
BME
SIEN
SAFIX
DAFIX
SADIR
DESCRIPTIONS
Transfer Width Select
00 = One byte (8 bits) is transferred for every GDMA operation
01 = One half-word (16 bits) is transferred for every GDMA operation
10 = One word (32 bits) is transferred for every GDMA operation
11 = Reserved
The GDMA_SCRB and GDMA_DSTB should be alignment under the
TWS selection
Single/Block Mode Select
1’b0 = Selects single mode. It requires an external GDMA request for
every incurring GDMA operation.
1’b1 = Selects block mode. It requires a single external GDMA request
during the atomic GDMA operation. An atomic GDMA operation is defined
as the sequence of GDMA operations until the transfer count register
reaches zero.
-
Burst Mode Enable
1’b0 = Disables the 4-data burst mode
1’b1 = Enables the 4-data burst mode
FF there are 16 words to be transferred, and BME [9]=1, the
GDMA_TCNT should be 0x04;
However, if BME [9]=0, the GDMA_TCNT should be 0x10.
Stop Interrupt Enable
1’b0 = Do not generate an interrupt when the GDMA operation is
stopped
1’b1 = Interrupt is generated when the GDMA operation is stopped
Source Address Fixed
1’b0 = Source address is changed during the GDMA operation
1’b1 = Do not change the destination address during the GDMA
operation. This feature can be used when data were transferred from a
single source to multiple destinations.
Destination Address Fixed
1’b0 = Destination address is changed during the GDMA operation
1’b1 = Do not change the destination address during the GDMA
operation. This feature can be used when data were transferred from
multiple sources to a single destination.
Source Address Direction
1’b0 = Source address is incremented successively
1’b1 = Source address is decremented successively
- 166 -