Pioneer SX-7 Service Manual page 14

The RWM hold period in the SX-7 has been
extended by inhibiting the microcomputer (con-
sumption current is less than 10pA). And in the
SX-6, SX-5 and SX-4, the battery life has likewise
been extended in much the same way. This
inhibition operation is controlled by the I-EQ- and
STBY terminals. The switching sequence involved
in switching to inhibit mode must follow the order
shown in Fig. 1-8. Normal memory functions are
lost once the inhibit mode Vcc drops below 2.5V.
Note that the RIESET terminal has to be at H level
during inhibit mode. Furthermore, approximately
lmA of current is consumed until cessation of the
clock pulse input (Extal).
Although the switch on sequence during restart
has not been specified, the reset signal is applied
only after all prescribed values have been retumed
to normal.
Fig. 1-8 Power supply sequence for inhibit mode