AT89S4D12 Features • Compatible with MCS-51™ Products • 128K Bytes of In-System Reprogrammable Flash data memory and 4K Bytes of Downloadable Flash Program Memory – Endurance: 1,000 Write/Erase Cycles per Sector – Data Retention: 10 Years Sector Programming: 128 Bytes/Sector Single 3.
3V ± 10% Supply On-Chip 12 MHz oscillator Two-Level Program Memory Lock 256-Bytes Internal RAM 5 Programmable I/O Lines Serial Peripheral Interface (SPI) Channel Serial Program Downloading Dual Data Pointer Registers • • • • • • • • • Description The AT89S4D12 is a low-voltage, highly integrated CMOS 8-bit microcomputer with 4K bytes of downloadable Flash program memory and 128K bytes of in-system reprogrammab...

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