Renesas H8S/2158, User Manual

Page: 445 / 929

Section 16 Serial Communication Interface (SCI, IrDA, and CRC)
Rev. 3.00 Jan 25, 2006 page 391 of 872
REJ09B0286-0300
16.2 Input/Output Pins
Table 16.1 shows the input/output pins for each SCI channel.
Table 16.1 Pin Configuration
Channel Symbol
*
Input/Output Function
SCK0 Input/Output Channel 0 clock input/output
RxD0 Input Channel 0 receive data input
TxD0 Output Channel 0 transmit data output
0
SSE0I Input Channel 0 stop input
SCK1 Input/Output Channel 1 clock input/output
RxD1/IrRxD Input Channel 1 receive data input (normal/IrDA)
1
TxD1/IrTxD Output Channel 1 transmit data output (normal/IrDA)
SCK2 Input/Output Channel 2 clock input/output
RxD2 Input Channel 2 receive data input
TxD2 Output Channel 2 transmit data output
2
SSE2I Input Channel 2 stop input
Note: * Pin names SCK, RxD, and TxD are used in the text for all channels, omitting the
channel designation.
16.3 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)