Rainbow Electronics AT83C24NDS - Manual (Page 2)

2
4234F–SCR–10/05
AT83C24
Acronyms
TWI: Two-wire Interface
POR: Power On Reset
PFD: Power Fail Detect
ART: Automatic Reset Transition
ATR: Answer To Reset
MSB: Most Significant Bit
LSB: Least Significant bit
SCIB: Smart Card Interface Bus
Block Diagram
PRES/ INT
CLK
VSS
CRST
CPRES
CIO, CC4, CC8
CCLK
CVCC
LI
RESET
Voltage
supervisor
POR/PFD
TWI
Controller
Clocks Controller
DC/DC
Converter
Analog
Drivers
SCL
SDA
I/O, C4, C8
DVCC
EVCC
A2/CK, A1/RST, A0/3V, CMDVCC
Timer
16 Bits
Main
Control
& Logic Unit
CVSS
CVCCIN
VCC