Lecture 4 Z80 Introduction Hong, You Pyo, DGU 1. Youpyo DGU Z80 Z80 is one of the most simple 8-bit microprocessor developed at 80’s. Z80 does.

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Presentation transcript:

Lecture 4 Z80 Introduction Hong, You Pyo, DGU 1

Youpyo DGU Z80 Z80 is one of the most simple 8-bit microprocessor developed at 80’s. Z80 does not contain any ROM/RAM/Flash memory which is good feature for beginners. 2

Youpyo DGU Z80 Pinouts 3

Youpyo DGU RAM/ROM Pinouts 4 RAM : 62256ROM : 28256

Youpyo DGU 62256, Address pin number is 15 and data pin number is 8. 2^15 = 32,768 32,768 * 8 = 262,144 bit 262,144/1,024 = K means 256K bit memory. 5

Youpyo DGU CPU and Memory Connection 6

Youpyo DGU Address Signal Connection 7

Youpyo DGU Data Connection 8

Youpyo DGU Two Potential Problems Two memories send out different voltages. 9 5V 0V Unwanted memory becomes open.

Youpyo DGU 10 5V

Youpyo DGU RAM Function Table 11

Youpyo DGU HW #0 Download Z80, 28C256 (EEPROM) and 62256(SRAM) datasheet. Keep them in a ring binder. 12