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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
Bit Name
7 to 4
3
SDIR
2
SINV
1
0
SMIF
Rev. 1.00 Mar. 12, 2008 Page 444 of 1178
REJ09B0403-0100
Initial
Value
R/W
Description
All 1
R
Reserved
These bits are always read as 1 and cannot be modified.
0
R/W
Smart Card Data Transfer Direction
Selects the serial/parallel conversion format.
0: TDR contents are transmitted with LSB-first.
Stores receive data as LSB first in RDR.
1: TDR contents are transmitted with MSB-first.
Stores receive data as MSB first in RDR.
The SDIR 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
Specifies inversion of the data logic level. The SINV bit
does not affect the logic level of the parity bit. When the
parity bit is inverted, invert the O/E bit in SMR.
0: TDR contents are transmitted as they are. Receive data
is stored as it is in RDR.
1: TDR contents are inverted before being transmitted.
Receive data is stored in inverted form in RDR.
1
R
Reserved
This bit is always read as 1 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 clock synchronous mode
1: Smart card interface mode
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