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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ATmega162 датащи(PDF) 272 Page - ATMEL Corporation |
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ATmega162 датащи(HTML) 272 Page - ATMEL Corporation |
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272 / 324 page  272 2513K–AVR–07/09 ATmega162/V Notes: 1. This assumes 50% clock duty cycle. The half period is actually the high time of the external clock, XTAL1. 2. This assumes 50% clock duty cycle. The half period is actually the low time of the external clock, XTAL1. 12 t RLRH RD Pulse Width 235 1.0t CLCL-15 ns 13 tDVWL Data Setup to WR Low 105 0.5tCLCL-20 (1) ns 14 t WHDX Data Hold After WR High 235 1.0t CLCL-15 ns 15 tDVWH Data Valid to WR High 250 1.0tCLCL ns 16 tWLWH WR Pulse Width 235 1.0tCLCL-15 ns Table 118. External Data Memory Characteristics, 2.7 - 5.5 Volts, no Wait-state (Continued) Symbol Parameter 4 MHz Oscillator Variable Oscillator Unit Min Max Min Max Table 119. External Data Memory Characteristics, 2.7 - 5.5 Volts, SRWn1 = 0, SRWn0 = 1 Symbol Parameter 4 MHz Oscillator Variable Oscillator Unit Min Max Min Max 01/tCLCL Oscillator Frequency 0.0 8 MHz 10 t RLDV Read Low to Data Valid 440 2.0t CLCL-60 ns 12 tRLRH RD Pulse Width 485 2.0tCLCL-15 ns 15 tDVWH Data Valid to WR High 500 2.0tCLCL ns 16 t WLWH WR Pulse Width 485 2.0t CLCL-15 ns Table 120. External Data Memory Characteristics, 2.7 - 5.5 Volts, SRWn1 = 1, SRWn0 = 0 Symbol Parameter 4 MHz Oscillator Variable Oscillator Unit Min Max Min Max 01/tCLCL Oscillator Frequency 0.0 8 MHz 10 t RLDV Read Low to Data Valid 690 3.0t CLCL-60 ns 12 t RLRH RD Pulse Width 735 3.0t CLCL-15 ns 15 tDVWH Data Valid to WR High 750 3.0tCLCL ns 16 t WLWH WR Pulse Width 735 3.0t CLCL-15 ns Table 121. External Data Memory Characteristics, 2.7 - 5.5 Volts, SRWn1 = 1, SRWn0 = 1 Symbol Parameter 4 MHz Oscillator Variable Oscillator Unit Min Max Min Max 01/t CLCL Oscillator Frequency 0.0 8 MHz 10 tRLDV Read Low to Data Valid 690 3.0tCLCL-60 ns 12 t RLRH RD Pulse Width 735 3.0t CLCL-15 ns 14 tWHDX Data Hold After WR High 485 2.0tCLCL-15 ns 15 tDVWH Data Valid to WR High 750 3.0tCLCL ns 16 t WLWH WR Pulse Width 735 3.0t CLCL-15 ns |
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