Interfacing AT89C4051 with an external Sram

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Read-Only Author vinash kumaran Posted 27-Dec-2005 11:00 GMT Toolset None	Interfacing AT89C4051 with an external Sram vinash kumaran Hi, I am trying to use AT89C4051 to interface with an ADC and an external SRAM. The whole idea is get the sensor input from the ADC ( in terms of voltage) and write it to the SRAM. I dont exactly know how to go about doing that ( e.g how to address the external SRAM and etc). Could someone be able to help me. By the way i am using C to programm the chip. Or are there good books to be recommended. Thank you.
Read-Only Author A.W. Neil Posted 27-Dec-2005 11:19 GMT Toolset C51	Impossible! A.W. Neil The 89C4051 doesn't have an external memory interface - see the datasheet! You could implement a serial interface in software (eg, I2C or SPI)... How much data do you intend to store?
Read-Only Author vinash kumaran Posted 27-Dec-2005 13:39 GMT Toolset C51	RE: Impossible! vinash kumaran I am planning to store about 30kbyte of data, I think 8051 would be a better choice... Could you advice me on it...Thank you. I dont have any idea on how to interface 8051 with an external SRam...
Read-Only Author A.W. Neil Posted 27-Dec-2005 14:32 GMT Toolset C51	RE: Impossible! A.W. Neil "I dont have any idea on how to interface 8051 with an external SRAM" You need to start with the basics: read the followig documents - commonly referred to as "the bible" for the 8051 (external memory interfacing is on p6 of Chapter 3): Chapter 1 - 80C51 Family Architecture: http://www.semiconductors.philips.com/acrobat/various/80C51_FAM_ARCH_1.pdf Chapter 2 - 80C51 Family Programmer's Guide and Instruction Set: http://www.semiconductors.philips.com/acrobat/various/80C51_FAM_PROG_GUIDE_1.pdf Chapter 3 - 80C51 Family Hardware Description: http://www.semiconductors.philips.com/acrobat/various/80C51_FAM_HARDWARE_1.pdf You probably also need to read the uVision Getting Started Guide, and work through the example projects in it. This will give you a proper introduction to the tools, how they work, and how to use them - rather than just jumping-in blindly at the deep end. (The uVision Getting Started Guide is available on the 'Books' tab in the 'Project' Window; The 'Books' window is also available via the 'Help' menu; failing all that, search for GS51.PDF in your Keil folder)

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