Rainbow-electronics AT89LS51 Manual do Utilizador descarregar pdf (Página 19)

AT89LS51

3053A–8051–05/02

Serial Programming Characteristics

Figure 9. Serial Programming Timing

MOSI

MISO

SCK

OVSH

SHSL

SLSH

SHOX

SLIV

Table 9. Serial Programming Characteristics, T

=-40°Cto85°C, V

= 2.7V - 4.0V (Unless Otherwise Noted)

Symbol Parameter Min Typ Max Units

1/t

CLCL

Oscillator Frequency 0 16 MHz

CLCL

Oscillator Period 62.5 ns

SHSL

SCK Pulse Width High 8 t

CLCL

SLSH

SCK Pulse Width Low 8 t

CLCL

OVSH

MOSI Setup to SCK High t

CLCL

SHOX

MOSI Hold after SCK High 2 t

CLCL

SLIV

SCK Low to MISO Valid 10 16 32 ns

ERASE

Chip Erase Instruction Cycle Time 500 ms

SWC

SerialByteWriteCycleTime 64t

CLCL

+ 400 µs

1 2 ... 14 15 16 17 18 19 20 21 22 23 24 ... 28 29

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