Datasheet

Section 13 Serial Communication Interface (SCI)
Rev. 3.00 Sep. 28, 2009 Page 254 of 710
REJ09B0384-0300
13.2 Input/Output Pins
Table 13.1 shows the input/output pins for each SCI channel.
Table 13.1 Pin Configuration
Channel Symbol* Input/Output Function
SCK1 Input/Output Channel 1 clock input/output
Input Channel 1 receive data input RxD1
Input/Output Channel 1 transmit/receive data input/output (when
smart card interface is selected)
1
TxD1 Output Channel 1 transmit data output
SCK3 Input/Output Channel 3 clock input/output
Input Channel 3 receive data input
3
RxD3
Input/Output Channel 3 transmit/receive data input/output (when
smart card interface is selected)
TxD3 Output Channel 3 transmit data output
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)