IA6805E2
Microprocessor Unit
As of Production Version 00
29 August 2007
Crystal Parameters Representative Frequencies:
R
S
max
C0
C1
Q
C
OSC1
C
OSC2
5.0 MHz
50Ω
8 pF
0.02 pF
50 k
15-30 pF
15-25 pF
4.0 MHz
75Ω
7 pF
0.012 pF
40 k
15-30 pF
15-25 pF
1.0 MHz
400Ω
5 pF
0.008 pF
30 k
15-40 pF
15-30 pF
Oscillator Connections:
CRYSTAL CIRCUIT
L
C1
38
OSC2
38
OSC2
C0
RS
39
OSC1
39
OSC1
ia6805E2
10 MΩ
38
OSC2
C OSC2
39
OSC1
C OSC1
NC
CRYSTAL OSCILLATOR CONNECTIONS
OSC1
OSC2
39
38
IA6805E2
t
OL
OSC1 PIN
t
t
OLOL
t
OH
Figure 3. OSC1, OSC2 (System Clock)
OSC1 to Bus Transitions Timing Waveforms:
OSC1
AS
DS
RW_n
A[12:8]
B[7:0]
MPU READ
B[7:0]
MPU WRITE
MUX ADDR
MPU
READ
DATA*
MUX ADDR
MPU WRITE DATA
*READ DATA "LATCHED" ON DS FALL
Figure 4. OSC1, OSC2 (System Clock)
Copyright
©
2007
©
IA211081401-03
www.Innovasic.com
Customer Support:
1-888-824-4184
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