Input/Output Pins - Renesas H8S Family Hardware Manual

Section 13 Serial Communication Interface (SCI)

13.2

Input/Output Pins

Table 13.1 shows the input/output pins for each SCI channel.
Table 13.1 Pin Configuration
Channel Symbol*
1 SCK1
RxD1
TxD1
3 SCK3
RxD3
TxD3
Note: * Pin names SCK, RxD, and TxD are used in the text for all channels, omitting the
channel designation.
13.3 Register Descriptions
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)
• Bit rate register (BRR)
Rev. 1.00 Mar. 12, 2008 Page 432 of 1178
REJ09B0403-0100
Input/Output Function
Input/Output Channel 1 clock input/output
Input Channel 1 receive data input
Input/Output Channel 1 transmit/receive data input/output (when
smart card interface is selected)
Output Channel 1 transmit data output
Input/Output Channel 3 clock input/output
Input Channel 3 receive data input
Input/Output Channel 3 transmit/receive data input/output (when
smart card interface is selected)
Output Channel 3 transmit data output