T2080 sdcard clock

[manikumar]

Hi,

In T2080 custom board, when cfg_rcw_src [0]_[1:4]_[5:8] Value 0_0100_0000 are set to SD CARD BOOT option.

Did power cycle: observations are:

1. HRESET_B is not released by processor (Always low)
2. Observed clock on SDHC_CLK pin which is connected to SD card (SD card is having image of RCW only). no clock on this line

But while emulator is connected and read the contents of POR Status Register 1 (DCFG_CCSR_PORSR1) from processor. the values shown proper.

Can someone please let me know how to debug this issue.

Regards,

Mani

[manikumar]

Hi,

In T2080 custom board, when cfg_rcw_src [0]_[1:4]_[5:8] Value 0_0100_0000 are set to SD CARD BOOT option.

Did power cycle: observations are:

1. HRESET_B is not released by processor (Always low)
2. Not observed clock on SDHC_CLK pin which is connected to SD card (SD card is having image of RCW only).

But while emulator is connected and read the contents of POR Status Register 1 (DCFG_CCSR_PORSR1) from processor. the cfg_rcw_src values which are set for SDcard boot mode are shown proper.

Can someone please let me know how to debug this issue.

Regards,

Mani

[alexander_yakov]

1. Please confirm TRST is asserted along with PORESET

2. Please confirm bit numbering is correct in cfg_rcw_src - specify which particular pin you are driving "1" to make 0_0100_0000

3. Please let me know the exact value of DCFG_CCSR_PORSR1

4. Please show scope screenshot of PORESET and SDHC_CLK simultaneously starting from PORESET assertion

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