Technical Reference Manual
002-29852 Rev. *B
Bits Name
SW
HW
Default or
Enum
Description
8
FILTER_EN
RW
R
0
RX filter enable (for 'cxpi_rx_in')
'0': No filter
'1': Median 3 (default value) operates on the last three
'cxpi_rx_in' values. The sequences '000', '001', '010',
and '100' result in a filtered value '0'. The sequences
'111', '110', '101', and '011' result in a filtered value '1'.
16:20 IFS
RW
R
0
Inter Frame Space in bit periods:
'0'' Invalid.
...
'10': 10 bit periods
...
'31': 31 bit periods
Values of <10 are not allowed.
This field is used for transmission/reception for adding
waiting inter frame space.
Note that after a valid transaction (after CRC), HW
waits for 10 bits as EOF. Hence, by setting
CTL0.IFS=0xA means that HW will wait for 10bits
before transmitting a new transaction (not including the
EOF).
Note: 0 is not allowed when IFS_WAIT=1. SW needs
to ensure it has program valid values before it can set
IFS_WAIT=1.
If IFS_WAIT=1 after timeout occurs, the value of
CTL0.IFS would need to consider the timeout count
i.e. (IFS needed - CTL2.TIMEOUT_LENGTH-1) to get
the total idle time. For example if
TIMEOUT_LENGTH=9 and IFS needed is 20, then
CTL0.IFS is set to 10.
21:24 IBS
RW
R
0
Inter Byte Space in bit periods:
'0' No offset.
'1' 1 IBS is inserted per every byte frame.
...
'9' 9 IBS are inserted per every byte frame.
Values >9 are invalid per spec.
This field is used to control number of IBS after every
byte frame when transmitting message frame.
Note that this field is the minimum IBS inserted for
every byte frame as the SW may require some time to
prepare the response when it receives the PID.
When receiving, this field is ignored with the exception
of receiving header and transmitting response. For
receiving header and transmitting response, SW can
enable IBS insertion by setting TIMEOUT_SEL=1/2
prior to setting CMD.RX_HEADER=1 and
CMD.RX_RESPONSE=1. If the received header
corresponds to transmit response, SW clears
CMD.RX_RESPONSE =0 and sets TX FIFO and
CMD.TX_RESPONSE=1. HW waits for minimum IBS
before transmit response (if timeout has not occurred
yet). It is prohibit to program IBS>TIMEOUT_LENGTH.
This field should not be changed during inflight
transaction including EOF.
767
2022-04-18
TRAVEO™ T2G Automotive MCU: TVII-B-E-4M body controller entry registers