An electrode controlled switching module, for an active implantable medical device having a generator, a lead having a two-wire line connected to said generator, and a plurality of selectively switchable detection/stimulation electrodes, said module comprising:
- At least one proximal terminal and at least one distal terminal for coupling to respective conductors of a two-wire line of the lead connected to the generator;
- An electrode terminal, connected to one of said detection/stimulation electrodes of the lead;
- A first circuit for selectively switching the electrode terminal to one or other of the proximal and distal terminals, said first circuit comprising a first controlled switch and a second controlled switch respectively coupling the electrode terminal to the proximal and distal terminals, said first and second controlled switches being volatile switches requiring activation by a power supply, and a first non-volatile programmable memory component associated with said first controlled switch and a second non-volatile programmable memory component associated with said second controlled switch, each of said non-volatile programmable memory components having in the absence of a power supply at least two stable states, one of said stable states controlling a corresponding open state of its associated controlled switch and the other of said stable states controlling a corresponding closed state of its associated controlled switch, and a maximum-minimum generator (MMG) circuit, having an input, a maximum output and a minimum output, coupled at the input between the proximal and distal terminals and coupled at the maximum and minimum outputs to the first and second controlled switches for selectively controlling them via the corresponding non-volatile programmable memory component;
- and
- A second circuit, responsive to a decoding signal delivered by the generator over said two-wire line, for controlling the first circuit according to said decoding signal to set said first and second controlled switches to a corresponding particular electrode configuration associated with said decoding signal, and means for previously programming the state of the first and second non-volatile programmable memory components by corresponding decoding signals applied by the generator on the two-wire line.