H8SLASH3021 datasheet(422/712 Pages) RENESAS

422 / 712 page

12. Smart Card Interface

Rev.2.00 Mar. 22, 2007 Page 398 of 684

REJ09B0352-0200

12.2

Registers added with the Smart Card interface and bits for which the function changes are

described here.

12.2.1

Smart Card Mode Register (SCMR)

Bit

Initial value

Read/Write

—

SDIR

R/W

SMIF

R/W

SINV

R/W

—

Reserved bits

Smart card data transfer direction

Selects the serial/parallel conversion format

Smart card data invert

Inverts data logic levels

Smart card interface

mode select

Enables or disables

the smart card

interface function

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.

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

TDR contents are transmitted LSB-first

(Initial value)

Receive data is stored in RDR LSB-first

TDR contents are transmitted MSB-first

Receive data is stored in RDR MSB-first

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