Rainbow-electronics DS1996 User Manual download pdf (Page 8)

DS1996

8 of 18

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 (480-960 µs)

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=0

TX 00h TA2, address=0000h

RX <8192 bytes> Read entire memory

TX Reset Reset pulse

RX Presence Presence pulse, done

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 17 18

No comments

Rainbow-electronics DS1996 User Manual Page 8