![]() A deliberate attempt at confusing any would-be attacker perhaps? The write scan however reveals that the chip is actually exposing some real functionality on some of the commands and that a couple of them violate SMBus protocol. ![]() Scan range: 00 - ff Skipping: None - *snip* ACK, Byte writable ACK ACK ACK ACK ACK ACK ACK ACK ACK ACK, Byte writable, Word writable, Block writable ACK, Byte writable, Word writable, Block writable ACK, Byte writable, Word writable, Block writable, >Block writable ACK, Byte writable, Word writable, Block writable, >Block writable ACK ACK The chip was ACKing on every command. $ smbusb_scan -w 0x16 - smbusb_scan - SMBusb Firmware Version: 1.0.1 Scanning for command writability. Pulling Pin #4 (also connected to Test Point 1 on the other side of the PCB) low during reset gave me this. Sanyo Tool Reset Bq8030 License Dat Matlab.
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