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UT69RH051 Datasheet(PDF) 16 Page - Aeroflex Circuit Technology |
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UT69RH051 Datasheet(HTML) 16 Page - Aeroflex Circuit Technology |
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16 / 19 page ![]() 16 APPENDIX B Impact of External Program ROM The 8051 family of microcontrollers, including the industry standards, use ports 0 and 2 to access external memory. In implementations with external program memory, these two ports are dedicated to the program ROM interface and can not be used as Input/Output ports. The UT69RH051 uses external program ROM, so ports 0 and 2 will not be available for I/O. |
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