Electronics and Communication Engineering - Microprocessors - Discussion
Discussion Forum : Microprocessors - Section 12 (Q.No. 12)
12.
If CS = A15 A14 A13 is used as chip select logic of a 4 K RAM in 8085 system, its memory range is
Discussion:
3 comments Page 1 of 1.
Chick said:
6 years ago
To enable the chip cs = 011 i.e a15, a14, a13.
4k implies 2^2 * 2^10 =2^12 so 12 address lines are used starting from a0 to a11 now a12 can be one or 0 and a0 to a11 can be all 0 or all 1 from this 0110(a12) 0000,0000,0000 -6000h
And 0110(a12)1111,1111,1111-6fffh.
Similarly, when a12 is one we get 7000h to 7fffh.
4k implies 2^2 * 2^10 =2^12 so 12 address lines are used starting from a0 to a11 now a12 can be one or 0 and a0 to a11 can be all 0 or all 1 from this 0110(a12) 0000,0000,0000 -6000h
And 0110(a12)1111,1111,1111-6fffh.
Similarly, when a12 is one we get 7000h to 7fffh.
Vaishali said:
7 years ago
It's 6000H-7FFFH.
Alka said:
7 years ago
Please provide it's solution.
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