HD64F3642AHV Datasheet, PDF (301/551 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

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
Abbr.
SCK1
SI1
SO1
Section 10 Serial Communication Interface
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
Abbr.
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'9C
Undefined
Undefined
Address
H'FFA0
H'FFA1
H'FFA2
H'FFA3
10.2.2 Register Descriptions
Serial Control Register 1 (SCR1)
Bit
Initial value
Read/Write
7
SNC1
0
R/W
6
SNC0
0
R/W
5
MRKON
0
R/W
4
LTCH
0
R/W
3
CKS3
0
R/W
2
CKS2
0
R/W
1
CKS1
0
R/W
0
CKS0
0
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.
Rev. 6.00 Sep 12, 2006 page 279 of 526
REJ09B0326-0600