Rainbow Electronics AT89C5122 - Manual (Page 65)

65
AT8xC5122/23
4202E–SCR–06/06
Block Diagram
The Smart Card Interface Block diagram is shown Figure 30:
Figure 30. SCIB Block Diagram
Definitions This paragraph introduces some of the terms used in ISO 7816-3 and EMV recommen-
dations. Please refer to the full recommendations for a complete list of terms.
Terminal and ICC Terminal is the reader, ICC is the Integrated Circuit Card
ETU Elementary Timing Unit (Bit time)
T=0 Character oriented half duplex protocol T=0
T=1 Block oriented half duplex protocol T=1
Activation: Cold Reset Reset initiated by the Terminal with Vcc power-up. The card will answer with ATR (see
below)
Activation: Warm Reset Reset initiated by the Terminal with Vcc already powered-up, and after a prior ATR or
Warm Reset
De-Activation Deactivation by the Terminal as a result of : unresponsive ICC, or ICC removal.
Barrel shifter
Scart
fsm
Interrupt generator
Power on
Power off
fsm
I/O
mux
IO (in)
IO (out)
CLK
RST
C4 (out)
Clk_iso
C8 (out)
C4 (in)
C8 (in)
Waiting time counter
Guard time counter
VCARD
INT
Clk_cpu
Etu counter
SCI Registers