Abstract
The memory for the Programmable System-on-Chip (PSoC) microcontroller is divided into two areas: random access memory (RAM) and read only memory (ROM). PSoC Designer is designed to handle RAM management to allow the user freedom from deciding where everything needs to go. The suggested method for allocating RAM for use in a project is to use the BLK directive. The BLK directive will allocate bytes of RAM for use in a project. PSoC Designer will try to place all RAM at the lowest address possible, as the stack for the Cypress PSoC will grow toward a higher address. There is an exception with the 25xxx/26xxx families, where the stack needs to be placed at address 40h or higher to guarantee correct operation if a receiver is present. This exception is not needed on newer PSoC parts.
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