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The HT48XA0-1/HT48XA0-2 have 62 instructions, but other MCUs in the Holtek range have 63 instructions. Why is there one less instruction for these devices?

April 26, 2017Devices holtek ht48xa0-1 ht48xa0-2 instruction instructions mcus range

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The HT48XA0-1/HT48XA0-2 have 62 instructions, but other MCUs in the Holtek range have 63 instructions. Why is there one less instruction for these devices?

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Answer The RETI instruction is not valid for these devices, because these MCUs have no interrupt function.