HD6433832S Datasheet, PDF (242/560 Pages) Renesas Technology Corp – single-chip microcomputers

Pin Configuration
Table 10.2 shows the SCI1 pin configuration.
Table 10.2 Pin Configuration
Name
SCI1 clock pin
SCI1 data input pin
SCI1 data output pin
Abbrev.
SCK₁
SI₁
SO₁
I/O
I/O
Input
Output
Function
SCI1 clock input or output
SCI1 receive data input
SCI1 transmit data output
Register Configuration
Table 10.3 shows the SCI1 register configuration.
Table 10.3 SCI1 Registers
Name
Abbrev.
R/W
Serial control register 1
SCR1
R/W
Serial control status register 1 SCSR1
R/W
Serial data register U
SDRU
R/W
Serial data register L
SDRL
R/W
Initial Value
H'00
H'80
Not fixed
Not fixed
Address
H'FFA0
H'FFA1
H'FFA2
H'FFA3
10.2.2 Register Descriptions
Serial Control Register 1 (SCR1)
Bit
7
6
5
SNC1 SNC0
—
Initial value
0
0
0
Read/Write
R/W
R/W
R/W
4
3
2
1
0
—
CKS3 CKS2 CKS1 CKS0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
SCR1 is an 8-bit read/write register for selecting the operation mode, the transfer clock source,
and the prescaler division ratio.
Upon reset, SCR1 is initialized to H'00. Writing to this register during a transfer stops the transfer.
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