Index
4-bit Microprocessors 4
8-bit Microprocessors 4
16-bit Microprocessors 4
32-bit Microprocessors 5
74138 Decoder IC 120
advantage of multiple chip select lines 122
use of 74138 to generate chip select logic 121
8051 Microcontroller 546
8255 Programmable Peripheral Interface Chip 323
architecture of 8255 325
interface with Microprocessor 326
interface with I/O Devices 327
pin diagram of 8255 324
port selection of 8255 325
A
Addressing of I/O ports 125
comparison of I/O port chips and memory chips 126
comparison of memory-mapped I/O and I/O-mapped I/O 129
IN and OUT instructions 127
I/O-mapped I/O 129
memory-mapped I/O 128
need for I/O Ports 125
Addressing modes of 6800 533
Direct addressing 534
Extended addressing 535
Immediate addressing ...
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