I loaded the MB11414-A_v1.xml into ST25R3916 Discovery GUI. And find there is a register '0x68', but in ST25R3916's datasheet, I can't find 0x68, only 0x28. Where 0x68 comes from.If it's a typo, that is 0x68 is actually 0x28, write 0x00 to mask 0x20 should disable the external load modulation, right? But the comment is 'Disable Internal Modulation', why ?Similar to above, write 0x10 to mask 0x10 should enable the internal load modulation, right? But the comment is 'use external load modulation'.In analogConfigTbl_NFC061A1.c, same problem exist thereBest regards.

D

diverger

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Confused about the 'load modulation' setting of CHIP_INIT configuration in ST25R3916 GUI and 'analogConfigTbl_NFC06A1.c'

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I loaded the MB11414-A_v1.xml into ST25R3916 Discovery GUI. And find there is a register '0x68', but in ST25R3916's datasheet, I can't find 0x68, only 0x28. Where 0x68 comes from.
If it's a typo, that is 0x68 is actually 0x28, write 0x00 to mask 0x20 should disable the external load modulation, right? But the comment is 'Disable Internal Modulation', why ?
Similar to above, write 0x10 to mask 0x10 should enable the internal load modulation, right? But the comment is 'use external load modulation'.
In analogConfigTbl_NFC061A1.c, same problem exist there

Best regards.

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Ulysses HERNIOSUSBest answer

ST Technical Moderator

Hi,

sorry for the confusion. Unfortunately the comments are wrong - they were manually created.

Regarding register addresses: If you read the DS there are registers in register space A and other in space B at the same addresses. So our software has refrained from providing separate functions for reading A vs B registers and has put both into a virtual register space with A being at base address 0x00 and B at base address 0x40.

So this 0x68 translates into 0x40|0x28: space B register 0x28.

Regards, Ulysses