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BQ2028 Datasheet(PDF) 11 Page - Texas Instruments |
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BQ2028 Datasheet(HTML) 11 Page - Texas Instruments |
11 / 26 page BUFFER Buffer3 Buffer2 Buffer1 Buffer0 128 x 32-bit EEPROM Pages 0–7, P[2:0] Page_Reg P[2:0] bq2028 www.ti.com SLUSB22B – OCTOBER 2012 – REVISED NOVEMBER 2012 EEPROM Access The bq2028 provides 512 bytes of EEPROM non-volatile memory storage organized as 128 words x 32 bits. Due to the address limitations of the HDQ interface protocol, the EEPROM is accessed in 8 pages, with 16 rows of 4 bytes each. For IC manufacturing and analog trim data, 16 bytes or 4 words are reserved in last page of data. The access model terminology is listed below: EEPROM = 128x32-bit (512 bytes) non-volatile memory with paged access BUFFER = 32-bit long word in 4x8b volatile Buffer C = 2-bit byte Column index for Buffer: C[1:0] Buffer[C] = 8-bit access to BUFFER at index C. MSB is at byte indexed by C='11‘. P = 3-bit Page index for EEPROM: P[2:0] (8 pages/EEPROM) PAGE[P] = 16x32-bit rows (64 bytes) from EEPROM indexed by [P] R = 4-bit Row index for EEPROM: R[3:0] (16 rows/page) ROW[P,R] = 32-bit long word from EEPROM indexed by [P,R] Pre-Fetch = Automatic copy of an ROW[P,R] to BUFFER before read/write operation M = Mapping operations to access BUFFER and EEPROM: M[1:0] Figure 11. Memory Map Copyright © 2012, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Links :bq2028 |
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