H8SLASH3028F datasheet(483/923 Pages) RENESAS

483 / 923 page

Rev. 2.00, 09/03, page 453 of 890

13.1.4

The SCI has internal registers as listed in table 13.2. These registers select asynchronous or

synchronous mode, specify the data format and bit rate, control the transmitter and receiver

sections, and specify switching between the serial communication interface and smart card

interface.

Table 13.2 SCI Registers

Channel

Address*

Name

Abbreviation

R/W

Initial Value

H’FFFB0

Serial mode register

SMR

R/W

H'00

H’FFFB1

Bit rate register

BRR

R/W

H'FF

H’FFFB2

Serial control register

SCR

R/W

H'00

H’FFFB3

Transmit data register

TDR

R/W

H'FF

H’FFFB4

Serial status register

SSR

R/(W)*

2 H'84

H’FFFB5

Receive data register

RDR

H'00

H’FFFB6

Smart card mode register

SCMR

R/W

H'F2

H’FFFB8

Serial mode register

SMR

R/W

H'00

H’FFFB9

Bit rate register

BRR

R/W

H'FF

H’FFFBA

Serial control register

SCR

R/W

H'00

H’FFFBB

Transmit data register

TDR

R/W

H'FF

H’FFFBC

Serial status register

SSR

R/(W)*

2 H'84

H’FFFBD

Receive data register

RDR

H'00

H’FFFBE

Smart card mode register

SCMR

R/W

H'F2

H’FFFC0

Serial mode register

SMR

R/W

H'00

H’FFFC1

Bit rate register

BRR

R/W

H'FF

H’FFFC2

Serial control register

SCR

R/W

H'00

H’FFFC3

Transmit data register

TDR

R/W

H'FF

H’FFFC4

Serial status register

SSR

R/(W)*

2 H'84

H’FFFC5

Receive data register

RDR

H'00

H’FFFC6

Smart card mode register

SCMR

R/W

H'F2

Notes: 1. Indicates the lower 20 bits of the address in advanced mode.

2. Only 0 can be written, to clear flags.

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