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Section 13 Serial Communication Interface (SCI)
13.3.8
Smart Card Mode Register (SCMR)
SCMR selects smart card interface mode and its format.
Bit
7
Bit Name
Initial Value
1
R/W
R
Bit
Bit Name
7 to 4
3
SDIR
2
SINV
1
0
SMIF
Rev.2.00 Jun. 28, 2007 Page 470 of 666
REJ09B0311-0200
6
5
1
1
R
R
Initial
Value
R/W
Description
All 1
R
Reserved
These are read-only bits and cannot be modified.
0
R/W
Smart Card Data Transfer Direction
Selects the serial/parallel conversion format.
0: Transfer with LSB-first
1: Transfer with MSB-first
This bit is valid only when the 8-bit data format is used
for transmission/reception; when the 7-bit data format is
used, data is always transmitted/received with LSB-first.
0
R/W
Smart Card Data Invert
Inverts the transmit/receive data logic level. This bit
does not affect the logic level of the parity bit. To invert
the parity bit, invert the O/E bit in SMR.
0: TDR contents are transmitted as they are. Receive
1: TDR contents are inverted before being transmitted.
1
R
Reserved
This is a read-only bit and cannot be modified.
0
R/W
Smart Card Interface Mode Select
When this bit is set to 1, smart card interface mode is
selected.
0: Normal asynchronous or clocked synchronous mode
1: Smart card interface mode
4
3
SDIR
1
0
R
R/W
data is stored as it is in RDR.
Receive data is stored in inverted form in RDR.
2
1
SINV
0
1
R/W
R
0
SMIF
0
R/W
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