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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
RDR
RxD
RSR
TxD
SCK
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
364
Module data bus
TDR
TSR
Parity generation
Parity check
Figure 6.10 Block Diagram of Smart Card Interface
SCMR
SSR
SCR
Baud rate
SMR
generator
Transmission/
reception control
Clock
BRR
ø
ø/4
ø/16
ø/64
TXI
RXI
ERI
Internal
data bus
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