Rainbow Electronics AT89C51SND1C - Manual (Page 185)

185
AT8xC51SND1C
4109E–8051–06/03
Phase Lock Loop
Schematic Figure 140. PLL Filter Connection
Parameters Table 157. PLL Filter Characteristics
V
DD
= 2.7 to 3.3 V, T
A
= -40 to +85
°
C
In System Programming
Schematic Figure 141. ISP Pull-Down Connection
Parameters Table 158. ISP Pull-Down Characteristics
V
DD
= 2.7 to 3.3 V, T
A
= -40 to +85
°
C
VSS
FILT
R
C1
C2
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
R
ISP
Symbol Parameter Min Typ Max Unit
R
ISP
ISP Pull-Down Resistor 2.2 K Ω