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AT89C51-20QI Datasheet(PDF) 9 Page - ATMEL Corporation |
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AT89C51-20QI Datasheet(HTML) 9 Page - ATMEL Corporation |
9 / 17 page AT89C51 9 Note: 1. Only used in 12-volt programming mode. Flash Programming and Verification Characteristics T A = 0°C to 70°C, VCC = 5.0 ± 10% Symbol Parameter Min Max Units V PP (1) Programming Enable Voltage 11.5 12.5 V I PP (1) Programming Enable Current 1.0 mA 1/t CLCL Oscillator Frequency 324 MHz t AVGL Address Setup to PROG Low 48t CLCL t GHAX Address Hold after PROG 48t CLCL t DVGL Data Setup to PROG Low 48t CLCL t GHDX Data Hold after PROG 48tCLCL t EHSH P2.7 (ENABLE) High to V PP 48tCLCL t SHGL V PP Setup to PROG Low 10 µs t GHSL (1) V PP Hold after PROG 10 µs t GLGH PROG Width 1 110 µs t AVQV Address to Data Valid 48tCLCL t ELQV ENABLE Low to Data Valid 48tCLCL t EHQZ Data Float after ENABLE 0 48t CLCL tGHBL PROG High to BUSY Low 1.0 µs t WC Byte Write Cycle Time 2.0 ms |
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