Rainbow Electronics AT83C24NDS - Manual (Page 34)

34
4234F–SCR–10/05
AT83C24
Typical
Application
Figure 1. Typical Standard Mode Application Diagram for 3 AT83C24 (up to 8 AT83C24 if needed)
Note: 1. The external resistor on I/O can be removed if the host pin has an internal resistor.
100nF
XTAL1 XTAL2
1uF
Host
CVSS CVSS
2.2µF
C1
C2 C10
4.7µH
VSS
VSS
PRES/INT
CLK
CRST
CPRES
CIO, CC4, CC8
CCLK
CVCC,
AT83C24
SCL
SDA
I/O, C4, C8
PRES/INT
CLK
CVCC,
SCL
SDA
I/O, C4, C8
PRES/INT
CLK
VSS VC
C
CVCC,
LI
C
VSS
SCL
SDA
I/O, C4, C8
Card 3
V
CC
MICROCONTROLLER
TWI
INT0
Px.y
L1
RESET RST
V
CC
4 to 48 MHz
RESET
RESET
V
CC
VSS
V
CC
VSS
V
CC
A2/CK
A1/RST
A0/3V
A2/CK
A1/RST
A0/3V
A2/CK
A1/RST
A0/3V
EVCC
EVC
C
EVCC
EVC
C
EVCC
EVCC
VSS
DVCC
VSS
DVCC
VSS
DVCC
100nF
100nF
100nF
VCC
2.2uF
CVSS
C3
100nF 1uF
CVSS CVSS
C5 C11
2.2uF
CVSS
C6
100nF 1uF
CVSS CVSS
C8 C12
2.2uF
CVSS
C9
VSS
Reset
pullup
SDA,
SCL
pullups
See note
for
I/O pull up
CRST
CPRES
CIO, CC4, CC8
CCLK
Card 2
CRST
CPRES
CIO, CC4, CC8
CCLK
Card 1
AT83C24
AT83C24
100nF
C13
VSS
2.2µF
C4 4.7µH
VS
S
VCC LI
CVS
S
L2
VSS
100nF
C14
VSS
V
CC
2.2µF
C5 4.7µH
VSS LI
CV
SS
L3
VSS
100nF
C15
VSS
V
CC
VCC
CVCCin
CVCCin
CVCCin