Values of Reserved Bits in CMPA/CFPA Registers

[LucianA]

Hello!

I have a question regarding how to set Reserved bits in the following registers
DCFG_CC_SOCU_NS_PIN (bits 14:10, and

DCFG_CC_SOCU_NS_DFLT (bits 15:10, 8).

In User Manual, for SECURE_BOOT_CFG (page 153), PRINCE_BASE_ADDR (page 154) etc

it is specified that Reserved Bits should be filled with zeros.

Is that also mandatory for Reserved Bits in DCFG_CC_SOCU_NS_PIN, DCFG_CC_SOCU_NS_DFLT?

Thank you!

[ZhangJennie]

HI LucianA 

To resolve your problem, please let me know,

- your chip part number

- document screenshot of where you concerned about.

Thanks for your cooperation,

Jun Zhang

[LucianA]

Hi Jennie,

According to "LPC55S6x_LPC55S2x_LPC552x Protected Flash Region v1.3.xlsx"

DCFG_CC_SOCU_NS_PIN and DCFG_CC_SOCU_NS_DFLT registers have the same format for all those families.

However, I'm particularly interested for LPC5528 device.
It's a must to write zeros in the Reserved Bits marked in red in the attached picture (DCFG_CC_SOCU_NS_PIN[14:10] and DCFG_CC_SOCU_NS_PIN[8])  ?

Thank you!

[ZhangJennie · Accepted solution]

HI LucianA 

If you don't want to enforce UUID checking, please leave these bits as default (0)

Hope this helps,

Jun Zhang

[LucianA]

Thanks Jennie,

I will keep all reserved bits on default values (zeros).