Jan 12, 2015 I am studying Sanyo BQ8030 controller in order to change the FCC. First I tried to enter in Boot mode by writting 0x0F00 to address 0x00 but without success. I found out that there are some special commands to access boot mode like 0x70, 0x71, 0x72 and 0x73. Jan 27, 2018 - Sanyo Tool Reset Bq8030 Datasheet Catalog. All Battery Server Software ver 1.5. Support Open Flash BQ20695A Ver 2.01. Edit direct FCC. Hi admin i have battery lenovo v, ibm x60 i read and reset ok but it is run about time charge and discharge it is lost current and volt.
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I started out by measuring voltages on all the pins. Data warehousing data mining and olap alex berson pdf merger. Just going by logic I was expecting some sort of differentiation on the various sides of the chip. To summarize my findings after the first pass: • 1-12 is the 'main microcontroller side' has the SMBus pins, VCC (and probably RESET and others) • 25-36 is connected to current sensing and exposes various built-in voltage regulators • 37-48 appears to be mainly unused with a couple of pins at 3.3v, GPIO side? • 13-24 has many pins connected directly to 'high voltage' from the cells. I took a 1k resistor connected to ground and started poking the pins with it to find reset.
It should be possible to pull reset low through 1k resistor but unlikely on VCC and it shouldn't lead to a complete reset on an unrelated pin. It's also possible to rule out most pins through visual inspection and measurement. So long story short: Pin #12 is Reset. Next I wanted to see if there's something like a Boot pin that's going to get me a different mode when pulled either low or high during reset so I started up a continuous command scan and started poking at the pins again.
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Pulling Pin #4 (also connected to Test Point 1 on the other side of the PCB) low during reset gave me this. $ smbusb_scan -w 0x16 ------------------------------------ smbusb_scan ------------------------------------ SMBusb Firmware Version: 1.0.1 Scanning for command writability. Scan range: 00 - ff Skipping: None ------------------------------------ *snip* [f0] ACK, Byte writable [f1] ACK [f2] ACK [f3] ACK [f4] ACK [f5] ACK [f6] ACK [f7] ACK [f8] ACK [f9] ACK [fa] ACK, Byte writable, Word writable, Block writable [fb] ACK, Byte writable, Word writable, Block writable [fc] ACK, Byte writable, Word writable, Block writable, >Block writable [fd] ACK, Byte writable, Word writable, Block writable, >Block writable [fe] ACK [ff] ACK The chip was ACKing on every command. 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.
Pin #4 appears to be BOOT (active-low). Mapping Mapping out the protocol took a while especially because it doesn't correspond to standard SMBus protocol but I was eventually able to figure out how to read and write to RAM and erase blocks of memory-mapped flash.
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Just writing to the appropriate address in ram (after the flash blocks have been erased) writes the flash memory which is convenient. There are several partitions of flash mapped into RAM and I'm sure I haven't found all of them. The ones I did are included as address&length presets in the flasher tool. $ smbusb_r2j240flasher -d eep2.bin -p df2 ------------------------------------ smbusb_r2j240flasher ------------------------------------ SMBusb Firmware Version: 1.0.1 ------------------------------------ Dumping memory 0x3400-0x37ff. $ xxd eep2.bin 0000000: 0000 0000 0000 0000 0000 ffff ffff ffff.
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0000010: 4c4e 562d 3432 5434 3739 3700 0000 0000 LNV-42T4797. *snip* $ smbusb_r2j240flasher -d eep3.bin -p df3 ------------------------------------ smbusb_r2j240flasher ------------------------------------ SMBusb Firmware Version: 1.0.1 ------------------------------------ Dumping memory 0xc000-0xdfff.