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DS1994L-F5 Datasheet(PDF) 9 Page - Dallas Semiconductor |
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DS1994L-F5 Datasheet(HTML) 9 Page - Dallas Semiconductor |
9 / 17 page DS1992/DS1993 9of 9 MEMORY FUNCTION EXAMPLES Example: Write two data Bytes to memory locations 0026h and 0027h (the seventh and eighth Bytes of page 1). Read entire memory. MASTER MODE DATA (LSB FIRST) COMMENTS TX Reset Reset pulse (480 ms to 960ms) RX Presence Presence pulse TX CCh Issue skip ROM command TX 0Fh Issue write scratchpad command TX 26h TA1, beginning offset = 6 TX 00h TA2, address = 0026h TX <2 data Bytes> Write 2 Bytes of data to scratchpad TX Reset Reset pulse RX Presence Presence pulse TX CCh Issue skip ROM command TX Aah Issue read scratchpad command RX 26h Read TA1, beginning offset = 6 RX 00h Read TA2, address = 0026h RX 07h Read E/S, ending offset = 7, flags = 0 RX <2 data Bytes> Read scratchpad data and verify TX Reset Reset pulse RX Presence Presence pulse TX CCh Issue skip ROM command TX 55h Issue copy scratchpad command TX 26h TX 00h TX 07h TA1 TA2 AUTHORIZATION CODE E/S TX Reset Reset pulse RX Presence Presence pulse TX CCh Issue skip ROM command TX F0h Issue read memory command TX 00h TA1, beginning offset = 6 TX 00h TA2, address = 0000h RX <128 Bytes (DS1992)> <512 Bytes (DS1993)> Read entire memory TX Reset Reset pulse RX Presence Presence pulse, done |
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