YM7302

YM7302 is a kind of Master Peripheral Controller (MPC) which is a single chip intergrated circuit used to provide compact yet effective control of the peripherial circuits (mouse, DMA,timer,interrupt,etc) in a CD-configuration.

There are some features of YM7302 as follows.First is direct interface capability with a 6800 MPU.The second is an intergrated single channel DMA controller.Then is a built-in 1200 bps mouse interface circuit (when using a 16 MHz master clock).Next is built-in memory and I/O type address decode circuit.The fifth is an intergrated 6 level order of priority interrupt handler.The sixth is intergrated bus arbitration function.The seventh is a built-in 40 bit timer counter (battery back-up available).The eighth is a built-in 16 MHz master clock oscillator circuit and an intergrated watch-dog timer.The ninth is an intergrated 16 bit pre-scaling timer counter and a built-in reset sequence circuit.The last one is CMOS, 5 V power supply, 100 PIN QFP.

What comes next is about the absolute maximum ratings of YM7302.The VDD (power supply voltage) is from -0.3 V to +7.0 V.The Vir (input terminal voltage) is from -0.3 V to VDD+0.3 V.The ambient operating temperature is from 0 to +70.The storage temperature is from -50 to +125.Then is about the recommended operating conditions.The minimum supply voltage is 4.75 V,the typicall is 5.00 V and the maximum is 5.25 V.The minimum operating temperature is 0,the typical is 25 and the maximum is 70.The minimum data storage voltage is 2.0 V and the maximum is 5.25 V.The typical clock frequency is 32.768 KHz.