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CAT34TS02 Datasheet(PDF) 10 Page - ON Semiconductor |
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CAT34TS02 Datasheet(HTML) 10 Page - ON Semiconductor |
10 / 20 page CAT34TS02 http://onsemi.com 10 Figure 27. EEPROM Page Write SDA LINE BYTE ADDRESS (n) DATA n DATA n+1 SLAVE ADDRESS SPD NOTE: In this example n = XXXX 0000(B); X = 1 or 0 SLAVE BUS ACTIVITY: MASTER A C K A C K A C K A C K A C K S S T A R T S T O P P DATA n+P Read Operations Immediate Read Upon power−up, the address counters for both the Temperature Sensor (TS) and on−board EEPROM are initialized to 00h. The TS address counter will thus point to the Capability Register and the EEPROM address counter will point to the first location in memory. The two address counters may be updated by subsequent operations. A CAT34TS02 presented with a Slave address containing a ‘1’ in the R/W position will acknowledge the Slave address and will then start transmitting data being pointed at by the current EEPROM data or respectively TS register address counter. The Master stops this transmission by responding with NoACK, followed by a STOP (Figure 28). Selective Read The Read operation can be started at an address different from the one stored in the respective address counters, by preceding the Immediate Read sequence with a ‘data less’ Write operation. The Master sends out a START, Slave address and address byte, but rather than following up with data (as in a Write operation), the Master then issues another START and continuous with an Immediate Read sequence (Figure 29). Sequential EEPROM Read EEPROM data can be read out indefinitely, as long as the Master responds with ACK (Figure 30). The internal address count is automatically incremented after every data byte sent to the bus. If the end of memory is reached during continuous Read, then the address counter ‘wraps−around’ to beginning of memory, etc. Sequential Read works with either Immediate Read or Selective Read, the only difference being that in the latter case the starting address is intentionally updated. Figure 28. Immediate Read SLAVE ADDRESS SPD TS SDA LINE SLAVE BUS ACTIVITY: MASTER DATA DATA (MSB) DATA (LSB) S S T A R T A C K N O A C K S T O P P N O A C K SLAVE ADDRESS BUS ACTIVITY: MASTER SDA LINE SLAVE A C K A C K S S T A R T A C K P S T O P |
Similar Part No. - CAT34TS02_13 |
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Similar Description - CAT34TS02_13 |
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