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Download Preliminary - Analog Devices
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System Design Preliminary Following the Control word is the regular bootstream, i.e., a series of “headers” and data payloads or “blocks”, with each header optionally followed by a corresponding block of data. An example bootstream appears in Table 12-6 on page 12-17. Table 12-6. Sample Bootstream Word Type Description Control Word 16-bit field (Wait State Information, EPROM/SPI Width) Flag 16-bit field (PM/DM/Final PM/Final DM) 24-bit Starting Address 32-bit field (24-bit padded to yield 32-bits) 16-bit Word Count 16-bit field Data Word 16-bit field if 16-bit data 32-bit field if 24-bit EMI data 24-bit field if 24-bit SPI data Data Word (see above) : : Flag (see above) 24-bit Starting Address (see above) 16-bit Word Count (see above) Data Word (see above) Data Word (see above) : Each header will consist of four 16-bit words: Flag, 24-bit Starting Address (uses two 16-bit words), and 16-bit Word Count. The first word of a header is a 16-bit field consisting of a flag that indicates whether the block of data to follow is either a 24-bit or 16-bit payload or zero-initialized data. The flag also uniquely identifies the last ADSP-2199x Mixed Signal DSP Controller Hardware Reference 12-17
