Microprocessors and Microcomputer-Based System Design, 2nd Edition

APPENDIX C

Intel^® 8085

Figure C.1 shows 8085 pins and signals. The following table describes the function of each pin:

FIGURE C.1 8085 pinout

SYMBOL	FUNCTION
A15 (Output, Three-Stale)	Address Bus: The most significant 8 bits of the memory address or the 8 bils of the I/O address.
A0–7 (Input/Output, Tree-State)	Multiplexed address/data bus: Lower 8-bits of the memory address (or I/O address) appear on the bus during the first clock cycle (T state) of a machine cycle. It then becomes the data bus during the second and third clock cycles.
: (Output)	Address Latch Enable: It occurs during the first clock state of a machine cycle and ...