HD64F2168 Datasheet, PDF (408/874 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer

14.3.8 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
Initial Value R/W
All 1
R
0
R/W
0
R/W
1
R
0
R/W
Description
Reserved
These bits are always read as 1 and cannot be
modified.
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.
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.
Reserved
This bit is always read as 1 and cannot be modified.
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
Rev. 3.00, 03/04, page 368 of 830