Datasheet

Rev.6.00 Oct.28.2004 page 520 of 1016
REJ09B0138-0600H
15.2 Register Descriptions
Registers added with the Smart Card interface and bits for which the function changes are described here.
15.2.1 Smart Card Mode Register (SCMR)
Bit:76543210
— — — — SDIR SINV — SMIF
Initial value : 1 1 1 1 0 0 1 0
R/W : — — — — R/W R/W — 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 standby mode or module stop mode.
Bits 7 to 4—Reserved: These bits cannot be modified and are always read as 1.
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 (Initial value)
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. This function is used together with
the SDIR bit for communication with an inverse convention card. The SINV bit does not affect the logic level of the parity
bit. For parity-related setting procedures, see section 15.3.4, Register Settings.
Bit 2
SINV Description
0 TDR contents are transmitted as they are (Initial value)
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
Bit 1—Reserved: This bit cannot be modified and is always read as 1.
Bit 0—Smart Card Interface Mode Select (SMIF): Enables or disables the Smart Card interface function.
Bit 0
SMIF Description
0 Smart Card interface function is disabled (Initial value)
1 Smart Card interface function is enabled