Renesas H8S/2319 series Hardware Manual page 477

Bit 3—Smart Card Data Transfer Direction (SDIR): Selects the serial/parallel conversion
format.
This bit is valid when 8-bit data is used as the transmit/receive 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
Bit 2—Smart Card Data Invert (SINV): Specifies inversion of the data logic level. The SINV
bit does not affect the logic level of the parity bit(s): parity bit inversion requires inversion of the
O/E bit in SMR.
Bit 2
SINV Description
0 TDR contents are transmitted without modification
Receive data is stored in RDR without modification
1 TDR contents are inverted before being transmitted
Receive data is stored in RDR in inverted form
Bit 1—Reserved: This bit cannot be modified and is always read as 1.
Bit 0—Smart Card Interface Mode Select (SMIF): When the smart card interface operates as a
normal SCI, 0 should be written to this bit.
Bit 0
SMIF Description
0 Operates as normal SCI (smart card interface function disabled)
1 Smart card interface function enabled
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(Initial value)
(Initial value)
(Initial value)