HD6433935 Hitachi, HD6433935 Datasheet - Page 256

• Manufacturer Part Number: HD6433935
• Description: 8-Bit MICROCONTROLLER
• Manufacturer: Hitachi

3. I/O configuration
Table 10-2 shows the SCI1 I/O configuration.
Table 10-2 SCI1 I/O Configuration
Name
SCI1 clock
SCI1 data input
SCI1 data output
4. Register configuration
Table 10-3 shows the SCI1 register configuration.
Table 10-3 Registers
Name
Serial control register 1
Serial control status register 1
Serial data register U
Serial data register L
Clock stop register 1
10.2.2
1. Serial control register 1 (SCR1)
SCR1 is an 8-bit read/write register that controls the operating mode, serial clock source, and
prescaler division ratio.
Upon reset, SCR1 is initialized to H'00. If this register is written to during transfer, transfer will be
halted.
244
Bit
Initial value
Read/Write
Register Descriptions
SNC1
R/W
7
0
Abbrev.
SCK
SI
SO
1
1
SNC0
R/W
1
6
0
Abbrev.
SCR1
SCSR1
SDRU
SDRL
CKSTPR1
MRKON
R/W
5
0
I/O
I/O
Input
Output
LTCH
R/W
4
0
R/W
R/W
R/W
R/W
R/W
R/W
CKS3
R/W
Function
SCI1 clock input/output
SCI1 receive data input
SCI1 transmit data output
3
0
Initial Value
H'00
H'9C
Undefined
Undefined
H'FF
CKS2
R/W
2
0
CKS1
R/W
1
0
Address
H'FFA0
H'FFA1
H'FFA2
H'FFA3
H'FFFA
CKS0
R/W
0
0