HD6432633 Datasheet, PDF (826/1453 Pages) Renesas Technology Corp – Series of Microcomputers (MCUs: microcomputer units)

17.2 Register Descriptions
Registers added with the Smart Card interface and bits for which the function changes are
described here.
17.2.1 Smart Card Mode Register (SCMR)
Bit
:
7
6
5
4
3
2
1
0
—
—
—
—
SDIR SINV
—
SMIF
Initial value :
1
1
1
1
0
0
1
0
R/W
:—
—
—
—
R/W
R/W
—
R/W
SCMR is an 8-bit readable/writable register that selects the Smart Card interface function.
SCMR is initialized to H'F2 by a reset and in hardware standby mode.
Bits 7 to 4—Reserved: These bits are always read as 1 and cannot be modified.
Bit 3—Smart Card Data Transfer Direction (SDIR): Selects the serial/parallel conversion
format.
Bit 3
SDIR
0
1
Description
TDR contents are transmitted LSB-first
Receive data is stored in RDR LSB-first
TDR contents are transmitted MSB-first
Receive data is stored in RDR MSB-first
(Initial value)
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