topic Re: some questions about Timed serial Bus(TSB) and Microsecond Channel downstream(MSC) in MPC5xxx

some questions about Timed serial Bus(TSB) and Microsecond Channel downstream(MSC)

huayeshen — Fri, 11 Aug 2023 10:03:01 GMT

Hello NXP Teams：

I am using MPC5777M,the DSPI has a mode called "Timed Serial Bus ",the document said it can be support in DSI, but i can not make clear how the TSB working in DSI.

By the way,the proper noun “ MicroSecond Channel (MSC) downstream” i don't uderstand too ,so what is the MicroSecond Channel (MSC) downstream ?is there any references？

Re: some questions about Timed serial Bus(TSB) and Microsecond Channel downstream(MSC)

davidtosenovjan — Fri, 11 Aug 2023 11:28:52 GMT

In the past I have tested DSPI serialization what’s already configuration similar to microsecond bus (on this device the feature is called timed serial bus TSB):

https://community.nxp.com/t5/MPC5xxx-Knowledge-Base/Example-MPC5746R-DSPI-serialization-S32DS-Power-2-1/ta-p/1479086

Microsecond bus protocol consist additional features to the SPI. These would be needed to configure and add to mentioned example and you will get MSC example:

1 ) serialization of internal timers

2) LVDS terminal pairs (positive and negative) for data output and clock

3) changes in data format

For SOUT and SCLK it is needed to choose and configure pins properly according excel sheet embedded to the device’s RM.

Re: some questions about Timed serial Bus(TSB) and Microsecond Channel downstream(MSC)

davidtosenovjan — Fri, 11 Aug 2023 11:32:43 GMT

“MicroSecond Channel (MSC) downstream” means just the transmit path from MCU (master) to the device (slave).

Re: some questions about Timed serial Bus(TSB) and Microsecond Channel downstream(MSC)

huayeshen — Fri, 11 Aug 2023 12:58:16 GMT

Thank you, so what is the meaning of TSB? It seems like just a simple way of communication between one host and multiple slaves