Register Descriptions; Smart Card Mode Register (Scmr) - Renesas H8S/2633 Series Hardware Manual

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
—
Initial value : 1
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 Description
0 TDR contents are transmitted LSB-first
Receive data is stored in RDR LSB-first
1 TDR contents are transmitted MSB-first
Receive data is stored in RDR MSB-first
772
6 5 4
— — —
1 1 1
— — —
3 2
SDIR SINV
0 0
R/W R/W
1 0
— SMIF
1 0
— R/W
(Initial value)