CYT4DNJBJS datasheet(195/209 Pages) INFINEON

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Datasheet

195

002-24601 Rev. *I

2023-02-14

TRAVEO™ T2G 32-bit Automotive MCU

Based on Arm® Cortex®-M7 dual

Errata

1. CAN FD RX FIFO top pointer feature does not function as expected

Problem Definition

RX FIFO top pointer function calculates the address for received messages in Message RAM by

hardware. This address should be re-start back from the start address after reading all messages

of RX FIFO n size (n: 0 or 1). However, the address does not re-start back from the start address

when RX FIFO n size is set to 1 (CANFD_CH_RXFnC.FnS = 0x01). This results in CPU/DMA to read

messages from the wrong address in Message RAM.

Parameters Affected

N/A

Trigger Condition(s)

RX FIFO top pointer function is used when RX FIFO n size set to 1 element (CANFD_CH_RXFnC.FnS

= 0x01).

Scope of Impact

Received message cannot be correctly read by using RX FIFO top pointer function, when RX FIFO

n size set to 1 element.

Workaround

Any of the following.

1) Set RX FIFO n size to 2 or more when using RX FIFO top pointer function.

2) Do not use RX FIFO top pointer function when RX FIFO n size set to 1 element. Instead of RX

FIFO top pointer, read received messages from the Message RAM directly.

Fix Status

No silicon fix planned. Use workaround.

2. CAN FD debug message handling state machine not get reset to Idle state when CANFD_CH_CCCR.INIT is set

Problem Definition

If either CANFD_CH_CCCR.INIT bit is set by the Host or when the M_TTCAN module enters Bus-off

state, the debug message handling state machine stays in its current state instead of being reset

to Idle state. Configuring the bit CANFD_CH_CCCR.CCE does not change CANFD_CH_RXF1S.DMS.

Parameters Affected

N/A

Trigger Condition(s)

Either CANFD_CH_CCCR.INIT bit is set by the Host or when the M_TTCAN module enters Bus-off

state.

Scope of Impact

The errata is limited to the use case when the Debug on CAN functionality is active. Normal

operation of CAN module is not affected, in which case the debug message handling state

machine always remains in Idle state. In the described use case, the debug message handling

state machine is stopped and remains in the current state signaled by the bit

CANFD_CH_RXF1S.DMS. In case CANFD_CH_RXF1S.DMS is set to 0b11, DMA request remains

active.

Bosch classifies this as non-critical error with low severity, there is no fix for the IP. Bosch recom-

mends the workaround listed also here.

Workaround

In case the debug message handling state machine has stopped while CANFD_CH_RXF1S.DMS

is 0b01 or 0b10, it can be reset to Idle state by hardware reset or by reception of debug messages

after CANFD_CH_CCCR.INIT is reset to zero.

Fix Status

No silicon fix planned. Use workaround.

3. No YUV422 allowed in Direct Capture Mode

Problem Definition

When VIDEOSS is operating in Direct Capture Mode (video input data goes directly to a display

without frame buffer interaction) the YUV 4:2:2 to 4:4:4 up-sampling function is corrupting video

in a way that prevents the display engine to properly synchronize.

Parameters Affected

N/A

Trigger Condition(s)

RASTERMODE = YUV422 in ExtScr4 when destination is ExtDst4 and not Store4 unit.

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