
Technical Reference Manual
002-29852 Rev. *B
Bits Name
SW
HW
Default or
Enum
Description
5
IFS_WAIT
RW
RW1C
0
SW sets this field to '1' to wait for IFS. HW clears this
field to '0' after it detects logical '1' based on IFS.
HW will keep this field to '1' if it detects logical '0'
before fulfilling the number of logical '1' required.
The intention of this bit is to provide capability for SW
to direct HW to check bus idle-ness before
transmitting. Without setting this bit before directing
HW to send header, HW will not check bus idle before
transmitting. Besides that, this bit will also provide SW
an option to configure HW to wait for IFS before
sending again PTYPE or PID to fulfill IFS if there is no
response from other nodes.
Note: SW needs to configure valid IFS values before
setting IFS_WAIT=1.
8
RX_HEADER
RW
RW1C
0
SW sets this field to '1' to receive a header. HW sets
this field to '0' on successful completion of the ANY of
the legal command sequences.
(Not set to '0' when an error is detected).
-RX_HEADER
-RX_HEADER, TX_RESPONSE
-RX_HEADER, RX_RESPONSE
The above applies for cases of receiving PID without
prior receiving PTYPE.
The header is received when the PID field STOP bits
are received (INTR.RX_HEADER_PID_DONE and
INTR.RX_HEADER_DONE).
Typically, a slave node SW sets both RX_HEADER
and RX_RESPONSE to '1', anticipating a transfer of a
response from the master node to this slave node.
After receipt of the header PID/PTYPE field
(INTR.RX_HEADER_PID_DONE is activated), the
slave node may decide to set TX_RESPONSE to '1'
(which has lower priority than RX_RESPONSE hence
RX_RESPONSE need to be clear to '0' by SW) to
transmit a response.
Note that, for cases with RXPIDZERO_CHECK_EN=1
for slave in polling mode, RX_HEADER is cleared
upon receiving PTYPE if the next course of action is to
transmit PID. If the next course of action is to receive
PID, then the RX_HEADER is cleared upon
completion of response.
9
RX_RESPONSE
RW
RW1C
0
SW sets this field to '1' to receive a response. HW sets
this field to '0' on successful completion of ANY of the
legal command sequences (NOT set to '0' when an
error is detected).
-TX_HEADER, RX_RESPONSE
-RX_HEADER, RX_RESPONSE
SW can set this field to '1' to be conservative on
receiving response i.e. IBS=0 whenever it is receiving
PID. If the PID corresponds to transmit response, the
SW can then clear this field to '0' and set
TX_RESPONSE=1 to direct HW to send response.
The response is received after CRC are received
(INTR.RX_RESPONSE_DONE).
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2022-04-18
TRAVEO™ T2G Automotive MCU: TVII-B-E-4M body controller entry registers