Configuring ST25TV02KC into Two Areas (Public Area 1, Password-Protected Area 2) Using RFAL
Hi everyone,
I’m trying to split an ST25TV02KC NFC-V tag into two memory areas using the RFAL (RF Abstraction Layer) library:
1. Area 1 (blocks 0 … END_A1) should be public (read/write without password)
2. Area 2 (blocks END_A1+1 … max) should be protected by the CONFIG password
My overall approach:
1. Enable Multi-Area
Read block 0x0A (the LCK_CONFIG register)
Set bit 0 in byte 1 to enable multi-area
2. Open CONFIG Security Session
GET_RANDOM_NUMBER (opcode 0xB4) with 1-byte manufacturer code (0x02)
PRESENT_PASSWORD (opcode 0xB3) with [IC-code, PWDID, encrypted 4-byte challenge]
3. WriteConfiguration for END_A1
FID=0x00, PID=0x01, DATA=END_A1
4. Verify with READ_CONFIGURATION (opcode 0xA0)
5. Write user data into Area 1 (public) or Area 2 (protected)
Despite following the ST25TV02KC datasheet, every time I issue the WRITE_CONFIGURATION command for setting END_A1, RFAL returns a timeout (RFAL_ERR_TIMEOUT, code 4).
Questions:
1. Am I missing any preliminary command or flag before WRITE_CONFIGURATION?
2. Do I need to issue a special “Select File” or “Change file ID” first?
3. Any timing-related tricks for ST25TV02KC (e.g. longer RF field-off durations)?
4. Has anyone successfully configured multi-area on ST25TV02KC via RFAL and can share a minimal working sequence?
Thanks in advance!