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TB027
| Title |
Title
Simplifying External Memory Connections of PIC17CXXX PICmicro ® Microcontrollers
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|---|---|
| Name |
Name
TB027
|
| Date |
Date
06/24/2015
|
| Description |
Description
The PIC17CXXX family of PICmicro ® microcontrollers has an external program memory interface. Since the PIC17CXXX devices implement a 16-bit instruction word, the external memory must be 16-bits wide. The addressing space of these devices is 64K x 16, which requires 16-bits of address as well. Until a few years ago, the designer had to use two 8-bit latches for addressing and two 8-bit wide memories. Now, many manufacturers of logic and memory devices have developed 16-bit wide devices. These new 16-bit wide devices can simplify the layout, reduce part count and cost as shown in Figure 1.
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