MPS6529

,..,commodore ~ aamlcanduct;ar graup [t\!][K!A]@~ MPS 6529 SINGLE-PORT INTERFACE 6529 SINGLE PORT INTERFACE DESCRIPTION The 6529 is a static microprocessor compatible, 8-bit I/O Port with passive output pull-up devices. Data is written to the port when CS and RNI/ are low. Data is read from the port when CS is low and RNI/ is high. The passive output pull-ups allow a single bit to act as either an input or an output without I/O mode switching. This device is provided with special circuitry to provide power-on reset. Under normal fast poweron conditions the outputs will initialize in the input high impedance state. With very slow or noisy power-up, there is some possibility the device will initialize with putputs driven low. It is recommended that the 6529 be interfaced to open collector output type devices. TRUTH TABLE CS RNI/ 00-0 7 L L DATA BUS TO PORT L H PORT TO DATA BUS H X ISOLATION L = LOW Level H= HIGH Level X =1 rrelevant ORDER INFORMATION MXS 6529 L FREQUENCY RANGE...