ZHCSJM7 April 2019 BQ79606A-Q1
PRODUCTION DATA.
A broadcast write command enables the customer to update up to 8 consecutive registers for an entire stack of devices (including the base and the bridge devices) with one command. As in the previous example, some register writes, OTP_PROG_UNLOCK1* and OTP_PROG_UNLOCK2* for example, require that multiple registers be written with one command. The broadcast write command frame must contain the register address to start at (address field) and the data bytes to write to the registers. The DATA_SIZE field in the initialization frame for the single device write command is the number of registers to update. The command frame for a broadcast write to the OTP_PROG_UNLOCK1* registers is configured as in Table 18
| Data | Comments | |
|---|---|---|
| Initialization Byte | 0xD3 | Writing 4 bytes to the all devices (D0 for 1byte) |
| Device ID Address | -- | No address byte is sent in broadcast mode |
| Register Address | 0x0100 | Start with address 0x100 (OTP_PROG_UNLOCK1A) |
| Data | 0x02B778BC | Write 4 bytes to registers 0x100-0x103 to all devices |
| CRC | 0x336A |