AN101 SPI and JTAG In-System Programming (ISP) guidelines for the Atmel ATmega AVR FLASH Microcontroller Family
ATmega128. Pin Configurations. Figure 1. Overview - Datasheet ATmega128, ATmega128L - Complete Atmel
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Using Serial Peripheral Interface (SPI) Master and Slave with Atmel AVR Microcontroller - ATMega32 AVR
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