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ATtiny261A Datasheet(PDF) 189 Page - ATMEL Corporation |
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ATtiny261A Datasheet(HTML) 189 Page - ATMEL Corporation |
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189 / 292 page  189 8197A–AVR–10/09 ATtiny261A/461A/861A 19.7 Serial Programming Characteristics Figure 19-3. Serial Programming Waveforms Figure 19-4. Serial Programming Timing Note: 1. 2 tCLCL for fck < 12 MHz, 3 tCLCL for fck >= 12 MHz Table 19-8. Serial Programming Characteristics, TA = -40°C to 85°C, VCC = 1.8 - 5.5V (Unless Otherwise Noted) Symbol Parameter Min Typ Max Units 1/tCLCL Oscillator Frequency 0 4 MHz tCLCL Oscillator Period 250 ns 1/tCLCL Oscillator Frequency (VCC = 4.5V - 5.5V) 0 20 MHz tCLCL Oscillator Period VCC = 4.5V - 5.5V 50 ns tSHSL SCK Pulse Width High 2 tCLCL (1) ns tSLSH SCK Pulse Width Low 2 tCLCL (1) ns tOVSH MOSI Setup to SCK High tCLCL ns tSHOX MOSI Hold after SCK High 2 tCLCL ns tSLIV SCK Low to MISO Valid 100 ns MSB MSB LSB LSB SERIAL CLOCK INPUT (SCK) SERIAL DATA INPUT (MOSI) (MISO) SAMPLE SERIAL DATA OUTPUT MOSI MISO SCK t OVSH t SHSL t SLSH t SHOX t SLIV |
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