Rainbow-electronics ATmega8HVD Uživatelský manuál stáhnout pdf (Strana 149)

149

8052B–AVR–09/08

ATmega4HVD/8HVD

26.6.2 High-voltage Serial Programming

Figure 26-3. High-voltage Serial Programming Timing

Table 26-9. High-voltage Serial Programming Characteristics T

= 25°C ± 10%, V

= 3.5V

± 10% (Unless otherwise noted)

Symbol Parameter Min Typ Max Units

SHSL

SCI Pulse Width High 1/f

SLSH

SCI Pulse Width Low 1/f

IVSH

SDI, SII Valid to SCI High 50 ns

SHIX

SDI, SII Hold after SCI High 50 ns

SHOV

SCI High to SDO Valid 16 ns

WLWH_PFB

Wait after Instr. 3 for Write Fuse Bits 2.5 ms

SDI , SII

SDO

SCI

IVSH

SHSL

SLSH

SHIX

SHOV

1 2 ... 144 145 146 147 148 149 150 151 152 153 154 ... 167 168

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Rainbow-electronics ATmega8HVD Uživatelský manuál Strana 149