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SMS44 Datasheet(PDF) 13 Page - Summit Microelectronics, Inc. |
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SMS44 Datasheet(HTML) 13 Page - Summit Microelectronics, Inc. |
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13 / 16 page ![]() 13 2047 2.3 10/23/00 SMS44 SUMMIT MICROELECTRONICS, Inc. The high order bits of the address byte remain constant. Should the master transmit more than 16 bytes, prior to generating the STOP condition, the address counter will “roll over” and the previously written data will be overwrit- Figure 10. Read and Write Operations ten. As with the byte-write operation, all inputs are disabled during the internal write cycle. Refer to Figure 10 for the address, ACKnowledge, and data transfer se- quence. Typical Write Operation (Standard memory device type) A C K R / W A C K D 7 D 6 D 5 D 4 D 3 D 2 D 1 D 0 A C K S T O P S T A R T Typical Reading Operation (Alternate memory device type) Master SDA Slave 1 1 0 S T A R T A C K B A 2 B A 1 A 8 R / W A C K D 7 D 6 D 5 D 4 D 3 D 2 D 1 D 0 A C K S T O P Master SDA Slave 0 1 10 A C K R / W A C K D 7 D 6 D 5 D 4 D 3 D 2 D 1 D 0 A C K S T O P S T A R T Writing Configuration Registers Master SDA Slave 01 10 Master SDA Slave Device Type Address Bus Address A 7 A 6 A 5 A 4 A 3 A 2 A 1 A 0 A 7 A 6 A 5 A 4 A 3 A 2 A 1 A 0 1 C 7 C 6 C 5 C 4 C 3 C 2 C 1 C 0 A C K R / W A C K S T A R T C 7 C 6 C 5 C 4 C 3 C 2 C 1 C 0 Reading the Configuration Register 01 10 A C K R / W A C K S T O P S T A R T D 7 D 6 D 5 D 4 D 3 D 2 D 1 D 0 01 10 Up to 15 additional bytes can be written before issuing the stop. The host may continue clocking out data so long as it provides an ACK response after each byte. B A 2 B A 1 A 8 B A 2 B A 1 X B A 2 B A 1 X B A 2 B A 1 X 2047 Fig10 2.1 |
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