Pioneer-SX4-rec-sm1 维修电路原理图.pdf

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1、 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 The RWM hold period in the SX-7 has beenextended by inhibiting the microcomputer (con-sumption current is less than 10pA). And in theSX-6, SX-5 and SX-4, the battery life has likewisebeen extended in much the same way. Thisinhibition operation is cont

2、rolled by the I-EQ- andSTBY terminals. The switching sequence involvedin switching to inhibit mode must follow the ordershown in Fig. 1-8. Normal memory functions arelost once the inhibit mode Vcc drops below 2.5V.Note that the RIESET terminal has to be at H levelduring inhibit mode. Furthermore, approximatelylmA of current is consumed until cessation of theclock pulse input (Extal).Although the switch on sequence during restarthas not been specified, the reset signal is appliedonly after all prescribed values have been retumedto normal.Fig. 1-8 Power supply sequence for inhibit mode