H8SLASH3028F datasheet(547/923 Pages) RENESAS

547 / 923 page

Rev. 2.00, 09/03, page 517 of 890

Bit 2—Smart Card Data Invert (SINV): Specifies inversion of the data logic level. This

function is used in combination with the SDIR bit to communicate with inverse-convention

cards.*2 The SINV bit does not affect the logic level of the parity bit. For parity settings, see

section 14.3.4, Register Settings.

Bit 2

SINV

Description

Unmodified TDR contents are transmitted

(Initial value)

Receive data is stored unmodified in RDR

Inverted TDR contents are transmitted

Receive data is inverted before storage in RDR

Bit 1—Reserved: Read-only bit, always read as 1.

Bit 0—Smart Card Interface Mode Select (SMIF): Enables the smart card interface function.

Bit 0

SMIF

Description

Smart card interface function is disabled

(Initial value)

Smart card interface function is enabled

Notes: 1. The function for switching between LSB-first and MSB-first mode can also be used

with the normal serial communication interface. Note that when the communication

format data length is set to 7 bits and MSB-first mode is selected for the serial data to

be transferred, bit 0 of TDR is not transmitted, and only bits 7 to 1 of the received data

are valid.

2. The data logic level inversion function can also be used with the normal serial

communication interface. Note that, when inverting the serial data to be transferred,

parity transmission and parity checking is based on the number of high-level periods at

the serial data I/O pin, and not on the register value.

14.2.2

Serial Status Register (SSR)

The function of SSR bit 4 is modified in smart card interface mode. This change also causes a

modification to the setting conditions for bit 2 (TEND).

H8/3028F Datasheet(PDF) 547 Page - Renesas Technology Corp