Rainbow-electronics AT89C51SND1C Manuale Utente Scaricare il pdf (Pagina 185)

185

AT8xC51SND1C

4109E–8051–06/03

Phase Lock Loop

Schematic Figure 140. PLL Filter Connection

Parameters Table 157. PLL Filter Characteristics

= 2.7 to 3.3 V, T

= -40 to +85°C

In System Programming

Schematic Figure 141. ISP Pull-Down Connection

Parameters Table 158. ISP Pull-Down Characteristics

= 2.7 to 3.3 V, T

= -40 to +85°C

VSS

FILT

VSS

Symbol Parameter Min Typ Max Unit

R Filter Resistor 100 Ω

C1 Filter Capacitance 1 10 nF

C2 Filter Capacitance 2 2.2 nF

VSS

ISP

Symbol Parameter Min Typ Max Unit

ISP

ISP Pull-Down Resistor 2.2 KΩ

1 2 ... 180 181 182 183 184 185 186 187 188 189 190 ... 209 210

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Rainbow-electronics AT89C51SND1C Manuale Utente Pagina 185