3069RF-ZTAT Datasheet, PDF (540/1003 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER

14.2 Register Descriptions
This section describes the new or modified registers and bit functions in the smart card interface.
14.2.1 Smart Card Mode Register (SCMR)
SCMR is an 8-bit readable/writable register that selects smart card interface functions.
Bit
7
6
5
4
3
2
1
0
—
—
—
—
SDIR SINV
—
SMIF
Initial value
1
1
1
1
0
0
1
0
Read/Write
—
—
—
—
R/W R/W
—
R/W
Reserved bits
Reserved bit
Smart card interface
mode select
Enables or disables
the smart card interface
function
Smart card data invert
Inverts data logic levels
Smart card data transfer direction
Selects the serial/parallel conversion format
SCMR is initialized to H'F2 by a reset and in standby mode.
Bits 7 to 4—Reserved: Read-only bits, always read as 1.
Bit 3—Smart Card Data Transfer Direction (SDIR): Selects the serial/parallel conversion
format.*¹
Bit 3
SDIR
0
1
Description
TDR contents are transmitted LSB-first
Receive data is stored LSB-first in RDR
TDR contents are transmitted MSB-first
Receive data is stored MSB-first in RDR
(Initial value)
Rev. 5.0, 09/04, page 518 of 978