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CAT24C208WI-GT3 Datenblatt(PDF) 7 Page - Catalyst Semiconductor |
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CAT24C208WI-GT3 Datenblatt(HTML) 7 Page - Catalyst Semiconductor |
7 / 13 page CAT24C208 7 Doc No. 1044, Rev. F © 2006 by Catalyst Semiconductor, Inc. Characteristics subject to change without notice DEVICE ADDRESSING DDC Interface Both the DDC and DSP interfaces to the device are based on the I2C bus serial interface. All memory space operations are done at the A0/A1 DDC address pair. As such, all write operations to the memory space are done at DDC address A0h and all read operations of the memory space are done at DDC address A1h. Figure 3 shows the bit sequence of a random read from anywhere within the memory space. The word offset determines which of the 256 bytes within segment 00h Figure 3. Random Access Read (Segment 00h only) Figure 4. Sequential Read (Segment 00h only) T R A T S0 0 0 0 0 1 0 1K C AS S E R D D A 0 A - 7 AK C AT R A T S1 0 0 0 0 1 0 1K C AA T A DK C A O NP O T S T R A T S0 0 0 0 0 1 0 1K C A 0 A - 7 A S S E R D D A K C AT R A T S1 0 0 0 0 1 0 1K C A0 A T A DK C A. . . . . . . . .N A T A DK C A O NP O T S Figures 5 and 6 show the byte and page write respectively. The configuration register must have the WE bit set to 1 prior to any write on DDC Port. Only the segment 00h can be accessed of either lower or upper bank. Figure 5. Byte Write (Segment 00h only) T R A T S0 0 0 0 0 1 0 1K C AS S E R D D A 0 A - 7 AK C AA T A DK C AP O T S Figure 6. Page Write (Segment 00h only) T R A T S0 0 0 0 0 1 0 1K C AS S E R D D A 0 A - 7 AK C A0 A T A DK C A. . . . . . . . .5 1 A T A DK C AP O T S WORD OFFSET WORD OFFSET WORD OFFSET WORD OFFSET is being read. Here the segment 00h can be at the lower or upper bank depending on the configuration register. Sequential reads can be done in much the same manner by reading successive bytes after each acknowledge without generating a stop condition. See Figure 4. The device automatically increments the word offset value (8-bit value) and with wraparound in the same segment 00h to read maximum of 256 bytes. |
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Ähnliche Beschreibung - CAT24C208WI-GT3 |
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