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Lecture 4 Z80 Introduction Hong, You Pyo, DGU 1
Youpyo Hong @ 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 Hong @ DGU Z80 Pinouts 3
Youpyo Hong @ DGU RAM/ROM Pinouts 4 RAM : 62256ROM : 28256
Youpyo Hong @ DGU 62256, 28256 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 = 256 256K means 256K bit memory. 5
Youpyo Hong @ DGU CPU and Memory Connection 6
Youpyo Hong @ DGU Address Signal Connection 7
Youpyo Hong @ DGU Data Connection 8
Youpyo Hong @ DGU Two Potential Problems Two memories send out different voltages. 9 5V 0V Unwanted memory becomes open.
Youpyo Hong @ DGU 10 5V
Youpyo Hong @ DGU RAM Function Table 11
Youpyo Hong @ DGU HW #0 Download Z80, 28C256 (EEPROM) and 62256(SRAM) datasheet. Keep them in a ring binder. 12
SOC Design Lecture 2 Lecture Goal. YOUPYO HONG, DGU Our Final Goal in This Course is To Design AHB-compatible SRAM controller.
SOC Design Lecture 9 SRAM vs. NOR Flash. Taehyun Kim & Youpyo Hong, DGU SRAM vs. NOR Flash There are asynchronous SRAM and synchronous SRAM. Our SRAM.
Lecture 0 Overview Hong, You Pyo, DGU 1. Y. Hong Microprocessor A semiconductor device that contains a CPU (Central Processing Unit) and peripherals In.
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