DS2703 SHA-1 Battery Pack Authentication IC

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PROGRAMMING PULSE

A typical programming waveform is shown in Figure 10. The user issues a 1-Wire reset followed by a Skip ROMID

command, Match ROMID plus the ROMID, Search or Read Net, the Load Secret command and then the two 32-bit

nominal voltage. The fast rise and fall time requirements for the programming pulse are required to prevent

damage during the transition between normal communication mode and programming mode.

Figure 10. Lock Secret, Set/Clear Overdrive Function Commands

SKIP ROM

Cmd

Lock Secret

or

Set/Clear Overdrive

Cmd

1-Wire

Reset

Presence

Pulse

Apply

Programming

Pulse

t

PPW