D12320VF25V Datasheet, PDF (492/1146 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 12 Serial Communication Interface (SCI)
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
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)
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
0
1
Description
TDR contents are transmitted without modification
Receive data is stored in RDR without modification
TDR contents are inverted before being transmitted
Receive data is stored in RDR in inverted form
(Initial value)
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
0
1
Description
Operates as normal SCI (smart card interface function disabled)
Smart card interface function enabled
(Initial value)
Rev.7.00 Feb. 14, 2007 page 458 of 1108
REJ09B0089-0700