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PCM2704CDB.B датащи(PDF) 22 Page - Texas Instruments |
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PCM2704CDB.B датащи(HTML) 22 Page - Texas Instruments |
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22 / 53 page ![]() S P DT CK Start Condition Stop Condition Device Address R/W ACK ACK ACK DATA DATA NACK 1 7 - 1 8 - 1 8 - 8 9 9 9 9 R/ : Read operation if ‘1’; otherwise, Write operation ACK: Acknowledgement of a byte if ‘0’ DATA: 8 bits (1 byte) NACK: No acknowledgement if ‘1’ W PCM2704C, PCM2705C, PCM2706C, PCM2707C SBFS036B – MAY 2015 – REVISED AUGUST 2015 www.ti.com The data must be stored from address 0x00 and must consist of 57 bytes, according to these listed parameters: • Vendor ID (2 bytes) • Product ID (2 bytes) • Product string (16 bytes in ANSI ASCII code) • Vendor string (32 bytes in ANSI ASCII code) • Power attribute (1 byte) • Max power (1 byte) • Auxiliary HID usage ID in report descriptor (3 bytes) Figure 28 shows the timing for an external ROM read operation. Table 3 summarizes the timing characteristics. Figure 28. External ROM Read Operation Table 3. External ROM Read Operation Characteristics M M M S S M S M S M M S Device address R/W ACK DATA ACK DATA ACK . . . NACK P 22 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: PCM2704C PCM2705C PCM2706C PCM2707C |
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