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14.1.2
Block Diagram
Figure 14.1 shows a block diagram of the smart card interface.
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
14.1.3
Pin Configuration
Table 14.1 shows the smart card interface pins.
Table 14.1 Smart Card Interface Pins
Pin Name
Serial clock pin
Receive data pin
Transmit data pin
490
Module data bus
TDR
TSR
Transmission/
Parity generation
Parity check
Figure 14.1 Block Diagram of Smart Card Interface
Abbreviation
SCK
RxD
TxD
BRR
SCMR
SSR
SCR
Baud rate
SMR
generator
reception
control
Clock
External clock
I/O
Function
I/O
Clock input/output
Input
Receive data input
Output
Transmit data output
Internal
data bus
φ
φ/4
φ/16
φ/64
TXI
RXI
ERI
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