Rainbow-electronics AT89C4051 Manual do Utilizador descarregar pdf (Página 11)

AT89C4051

Note: 1. Only used in 12-volt programming mode.

Flash Programming and Verification Waveforms

Flash Programming and Verification Characteristics

= 20°C to 30°C, V

= 5.0 ± 10%

Symbol Parameter Min Max Units

Programming Enable Voltage 11.5 12.5 V

Programming Enable Current 250 µA

DVGL

Data Setup to PROG Low 1.0 µs

GHDX

Data Hold after PROG 1.0 µs

EHSH

P3.4 (ENABLE) High to V

1.0 µs

SHGL

Setup to PROG Low 10 µs

GHSL

Hold after PROG 10 µs

GLGH

PROG Width 1 110 µs

ELQV

ENABLE Low to Data Valid 1.0 µs

EHQZ

Data Float after ENABLE 01.0 µs

GHBL

PROG High to BUSY Low 50 ns

Byte Write Cycle Time 2.0 ms

BHIH

RDY/BSY\ to Increment Clock Delay 1.0 µs

IHIL

Increment Clock High 200 ns

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 17 18

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Rainbow-electronics AT89C4051 Manual do Utilizador Página 11