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UPD78F4216AY Datasheet(PDF) 21 Page - NEC |
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UPD78F4216AY Datasheet(HTML) 21 Page - NEC |
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21 / 60 page  Data Sheet U14125EJ1V0DS00 21 µµµµPD78F4216A, 78F4218A, 78F4216AY, 78F4218AY (2) µµµµPD78F4218A, 78F4218AY Figure 5-2. Internal Memory Size Switching Register (IMS) Format Address: 0FFFCH After reset: FFH W 76 54 321 0 IMS 1 1 ROM1 ROM0 1 1 RAM1 RAM0 ROM1 ROM0 Internal ROM Capacity Selection 0 0 64 KB 0 1 128 KB 1 0 192 KB 1 1 256 KB RAM1 RAM0 Peripheral RAM Capacity Selection 0 0 3,072 bytes 0 1 6,656 bytes 1 0 7,168 bytes 1 1 12,288 bytes Caution IMS is not provided on the mask ROM versions ( µµµµPD784217A, 784218A, 784217AY, and 784218AY). Table 5-2 shows the IMS setting values to make the memory mapping the same as that of the mask ROM versions. Table 5-2. Setting Value of Internal Memory Size Switching Register (IMS) Target Mask ROM Version IMS Setting Value µPD784217A, 784217AY EFH µPD784218A, 784218AY FFH |
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