VTech Alphabert s Magic Readport User Manual download pdf (Page 58)

Lab Manual of Microcontroller & Interfacing Page 58

B. Modify program such that LEDs connected at P1.4 to P1.7 shows which row is scanned

by the program and P2.4 to P2.7 shows which key is pressed in each row.

Memory

Location

HEX

code

Label Opcode Operands Comments

1 2 ... 53 54 55 56 57 58 59 60 61 62 63 ... 79 80

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VTech Alphabert s Magic Readport User Manual Page 58