| Metric | MCU T5.2.8 (Legacy) | MCU T5.3.19 | Delta | |-------------------|--------------------|--------------|-----------| | Secure Boot Time | 48 ms | 51 ms | +6% (slower) | | AES-256 Encryption (16KB) | 2.1 ms | 1.8 ms | | | Interrupt Latency (worst-case) | 42 cycles | 44 cycles | +4.7% (negligible) | | Idle Power (Stop Mode) | 12 µA | 11.2 µA | -6.6% improvement |
: Often caused by a mismatch between the MCU version and the actual audio/radio chips in the unit. Reverting to the factory-installed MCU version is usually the only fix. mcu t5.3.19
folder before attempting updates to preserve Bluetooth functionality. Research Resources | Metric | MCU T5
Commonly found on units running Android 6.0.1, 7.1.1, or 8.1.0. Hardware Control: or 8.1.0. Hardware Control: