H8SSLASH2218 datasheet(415/750 Pages) RENESAS

415 / 750 page

Section 12 Serial Communication Interface

Rev.6.00 Jun. 03, 2008 Page 367 of 698

REJ09B0074-0600

12.2

Input/Output Pins

Table 12.1 shows the serial pins for each SCI channel.

Table 12.1

Pin Configuration

Channel

Pin Name*

I/O

Function

SCK0

I/O

SCI_0 clock input/output

RxD0

Input

SCI_0 receive data input

TxD0

Output

SCI_0 transmit data output

SCK2

I/O

SCI_2 clock input/output

RxD2

Input

SCI_2 receive data input

TxD2

Output

SCI_2 transmit data output

Note: * Pin names SCK, RxD, and TxD are used in the text for all channels, omitting the channel

designation.

12.3

The SCI has the following registers for each channel. Some bits in the serial mode register (SMR),

serial status register (SSR), and serial control register (SCR) have different functions in different

modes

⎯normal serial communication interface mode and smart card interface mode; therefore,

the bits are described separately for each mode in the corresponding register sections.

• Receive shift register (RSR)

• Receive data register (RDR)

• Transmit data register (TDR)

• Transmit shift register (TSR)

• Serial mode register (SMR)

• Serial control register (SCR)

• Serial status register (SSR)

• Smart card mode register (SCMR)

• Serial extended mode register A_0 (SEMRA_0) (only for channel 0)

• Serial extended mode register B_0 (SEMRB_0) (only for channel 0)

• Bit rate register (BRR)

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