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15.1.2
Block Diagram
Figure 15.1 shows a block diagram of the smart card interface.
SCRDR
RxD
SCRSR
TxD
SCK
Legend
SCSCMR:
Smart card mode register
SCRSR:
Receive shift register
SCRDR:
Receive data register
SCTSR:
Transmit shift register
SCTDR:
Transmit data register
SCSMR:
Serial mode register
SCSCR:
Serial control register
SCSSR:
Serial status register
SCBRR:
Bit rate register
Figure 15.1 Block Diagram of Smart Card Interface
494
Module data bus
SCTDR
SCSCMR
SCSSR
SCSCR
SCSMR
SCTSR
Transmit/
receive
control
Parity generation
Parity check
SCBRR
Baud rate
generator
Clock
External clock
SCI
Internal
data bus
Pφ
Pφ/4
Pφ/16
Pφ/64
TXI
RXI
ERI
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