BU8315F

Communication ICs Panel interface BU8315S / BU8315F The BU8315S and BU8315F are LED drivers with a flashing function. They can be connected in series to panel PCBs in equipment such as telephones, facsimile machines, and copying machines, and to microcomputers of main PCBs, and significantly reduce the amount of wiring required. FApplications Sets with operation panels, such as telephones, facsimile machines, and copying machines FFeatures 1) LED interface (14-bit serial in / parallel out). 2) Built-in LED automatic flashing function. FAbsolute maximum ratings (Ta = 25_C) FRecommended operating conditions (Ta = 25_C) 289 Communication ICs FBlock diagram BU8315S / BU8315F FPin descriptions 290 Communication ICs FInput / output circuits BU8315S / BU8315F FElectrical characteristics (unless otherwise noted, Ta = 25_C, VDD = 3 X 5.5V) 291 Communication ICs FSerial data input timing BU8315S / BU8315F FMeasurement circuits 292 Communication ICs FCircuit operation (1) LED control command data format (for serial data, the MSB is first) BU8315S / BU8315F (2) Shifts in flashing pattern based on LED control commands (example of data input) (3) Example of serial input of LED control command 293 Communication ICs FOperation notes (1) When the power supply is turned on, the contents of the register are unstable, so the RST pin should be set to LOW and a reset initiated. BU8315S / BU8315F (2) The maximum LED output per bit is 20mA, so that the maximum LED output...