14.1.3 Input/Output Pins
Table 14-1 lists the smart card interface pins.
Table 14-1 Smart Card Interface Pins
Name
Abbreviation
I/O
Function
Serial clock pin
SCK
0
Output
Clock output
Receive data pin
RxD
0
Input
Receive data input
Transmit data pin
TxD
0
Output
Transmit data output
14.1.4 Register Configuration
The smart card interface has the internal registers listed in table 14-2. BRR, TDR, and RDR have
their normal serial communication interface functions, as described in section 13, Serial
Communication Interface.
Table 14-2 Registers
Address
*
1
Name
Abbreviation
R/W
Initial Value
H'FFB0
Serial mode register
SMR
R/W
H'00
H'FFB1
Bit rate register
BRR
R/W
H'FF
H'FFB2
Serial control register
SCR
R/W
H'00
H'FFB3
Transmit data register
TDR
R/W
H'FF
H'FFB4
Serial status register
SSR
R/(W)
*
2
F'84
H'FFB5
Receive data register
RDR
R
H'00
H'FFB6
Smart card mode register
SCMR
R/W
H'F2
Notes: 1. Lower 16 bits of the address.
2. Only 0 can be written, to clear flags.
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