364
6.10
Smart Card Interface
6.10.1
Features
•
IC card (smart card) interface conforming to ISO/IEC7816-3 supported as SCI extension
function
•
Switching between normal SCI and smart card interface by means of register setting
•
Built-in baud rate generator allows any bit rate to be selected
•
DTC and DMAC can be activated by three interrupts (TXI, RXI, and ERI)
6.10.2
Block Diagram
Bus interface
TDR
RSR
RDR
Module data bus
TSR
SCMR
SSR
SCR
Transmission/
reception control
BRR
Baud rate
generator
Internal
data bus
RxD
TxD
SCK
Parity check
Parity generation
Clock
ø
ø/4
ø/16
ø/64
TXI
RXI
ERI
SMR
Legend
SCMR: Smart card mode register
RSR:
Receive shift register
RDR:
Receive data register
TSR:
Transmit shift register
TDR:
Transmit data register
SMR:
Serial mode register
SCR:
Serial control register
SSR:
Serial status register
BRR:
Bit rate register
Figure 6.10 Block Diagram of Smart Card Interface
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