How to configure PSSI to be used as Parallel Slave port

[bhavan_kumar]

Hi,

     I am currently using STM32H5 series, to transmit the RTC register content to an escalator base board. I need to transmit these data in a parallel manner (i.e. MCU act as a slave and the base board act as a master). I studied that STM32H5 series has PSSI which involves a data bus (PSSI_D[15:0]), data enable (PSSI_DE) and ready bit (PSSI_RDY) and a clock (PSSI_PDCK). Where the signal comes from the base boards are address and data lines (PMD<7:0>), chip select (PMCSx), read (PMRD) and write signal (PMWR).

A 4-bit address is transmit to the MCU (slave) from the base board (master). The MCU needs to place the data in the data bus as shown in the Figure 4-1. Is it possible to implement this in STM32H5 series? If not then suggests me some other STM MCUs with the following specifications:

1. Dimension between (5mmx5mm) to (9mmx9mm)

2. Pin count between 32 to 64

3. Package - Any package except ball grid array

Your help and advice much appreciated.

[SofLit · Accepted solution]

Hello and welcome to the community,

Have a look at this article (used H7 but it applies also to H5): https://community.st.com/t5/stm32-mcus/how-to-configure-and-use-the-pssi-on-the-stm32h7/ta-p/49811