Technical Reference Manual
002-29852 Rev. *B
Bits Name
SW
HW
Default or
Enum
Description
8
DATA_PREFETCH
R
W
Undefined
Source data prefetch:
'0': No source data prefetch. Source data transfers are
only initiated AFTER the input trigger is activated.
'1': Source data prefetch. Source data transfers are
initiated as soon as the channel is enabled, the current
descriptor pointer is NOT '0' and there is space
available in the channel's data FIFO. When the input
trigger is activated, the trigger can initiate destination
data transfers with data that is already in the channel's
data FIFO. This effectively shortens the initial delay of
the data transfer.
Note: data prefetch should be used with care, to
ensure that data coherency is guaranteed and that
prefetches do not cause undesired side effects.
16:17 DATA_SIZE
R
W
Undefined
Specifies the data element size:
'0': Byte (8 bits).
'1': Halfword (16 bits).
'2': Word (32 bits).
DATA_SIZE, SRC_TRANSFER_SIZE and
DST_TRANSFER_SIZE together determine how data
elements are transferred. The following are the 9 legal
settings:
- DATA is 8 bit, SRC is 8 bit, DST is 8 bit.
- DATA is 8 bit, SRC is 32 bit (higher 24 bits are
dropped), DST is 8 bit.
- DATA is 8 bit, SRC is 8 bit, DST is 32 bit (higher 24
bits are made '0').
- DATA is 8 bit, SRC is 32 bit (higher 24 bits are
dropped), DST is 32 bit (higher 24 bits are made '0').
- DATA is 16 bit, SRC is 16 bit, DST is 16 bit.
- DATA is 16 bit, SRC is 32 bit (higher 16 bits are
dropped), DST is 16 bit.
- DATA is 16 bit, SRC is 16 bit, DST is 32 bit (higher
16 bits are made '0').
- DATA is 16 bit, SRC is 32 bit (higher 16 bits are
dropped), DST is 32 bit (higher 16 bits are made '0').
- DATA is 32 bit, SRC is 32 bit, DST is 32 bit.
Note: this field is not used for a 'memory copy'
descriptor type. Note: this field must be set to '2' for a
'initialization' descriptor type.
24
CH_DISABLE
R
W
Undefined
Specifies whether the channel is disabled or not after
completion of the current descriptor (independent of
the value of the DESCR_NEXT_PTR value):
'0': Channel is not disabled.
'1': Channel is disabled.
26
SRC_TRANSFER_SIZE
R
W
Undefined
Specifies the bus transfer size to the source location:
'0': As specified by DATA_SIZE.
'1': Word (32 bits).
Distinguishing bus transfer size from data element size
allows for source components with data elements that
are smaller than their 32-bit bus interface width. E.g.,
an ADC source has a 32-bit bus transfer size, but only
provides a 16-bit data element.
Note: this field is not used for a 'memory copy'
descriptor type. Note: this field must be set to '1' for a
'scatter' descriptor type.
814
2022-04-18
TRAVEO™ T2G Automotive MCU: TVII-B-E-4M body controller entry registers