BU8313K

Communication ICs Panel interface BU8310AK / BU8311KS / BU8313K The BU8310AK, BU8311KS, and BU8313K are large-scale integrated circuits for telephones, which enable a serial input / output interface between the key input required for telephone panel boards and LED control functions. They reduce the number of wiring harnesses needed between the main board in the telephone and the panel board, and take some of the processing load off the main CPU. FApplications Telephones and cordless telephones FFeatures 1) Keypad matrix interface 1 Key input is output as 16-bit serial data. 2 Internal chattering prevention circuit built into the key input circuit. 2) LED interface 1 LED control commands input as 16-bit serial data. 2 Bits with a pattern generator and pattern register can be assigned three independent flashing patterns in addition to being lighted or off. 3 Power consumption can be reduced using RST pin input. 4 LED on and off control can be initiated using ENA pin input or by commands setting all LEDs valid or invalid. 277 Communication ICs FBlock diagram BU8310AK / BU8311KS / BU8313K 278 Communication ICs BU8310AK / BU8311KS / BU8313K 279 Communication ICs FAbsolute maximum ratings (Ta = 25_C) BU8310AK / BU8311KS / BU8313K FRecommended operating conditions FPin descriptions 280 Communication ICs BU8310AK / BU8311KS / BU8313K FInput / output circuits 281 Communication ICs BU8310AK / BU8311KS / BU8313K FElectrical characteristics DC characteristics (unle...