Renesas Asynchronous SH7145F User Manual
Page 5
SH7145F
Asynchronous Serial Data Transmission/Reception
REJ06B0357-0100O/Rev.1.00
March 2004
Page 5 of 17
•
Bit Rate Register (BRR_1)
This 8-bit register is used to adjust the bit rate. The SCI has independent baud rate generators
for the individual channels, allowing different bit rates to be set for each. See the hardware
manual for details on setting values, execution rate relationships, etc.
Table 2 shows the function allocations for the task example.
Table 2
Function Allocations
Function
Classification
Function Allocation
TXD1
Pin
Channel 1 transmit data output pin
RXD1
Pin
Channel 1 transmit data input pin
SMR_1
SCI1
Sets communication format to asynchronous mode
SCR_1
SCI1
Enables transmit operation
SSR_1
SCI1
Status flag showing SCI1 operation status
SDCR_1
SCI1
Specifies LSB-first
BRR_1
SCI1
Sets communication bit rate
TSR_1
SCI1
Register for transmitting serial data
TDR_1
SCI1
Register for storing transmit data
RSR_1
SCI1
Register for receiving serial data
RDR_1
SCI1
Register for storing receive data