HD6475328-CP10 HITACHI [Hitachi Semiconductor], HD6475328-CP10 Datasheet - Page 262

• Manufacturer Part Number: HD6475328-CP10
• Description: original Hitachi CMOS microcomputer unit (MCU)
• Manufacturer: HITACHI [Hitachi Semiconductor]

14.1.3 Input and Output Pins
Table 14-1 lists the input and output pins used by the SCI module.
Table 14-1 SCI Input/Output Pins
Name
Serial clock
Receive data
Transmit data
14.1.4 Register Configuration
Table 14-2 lists the SCI registers.
Table 14-2 SCI Registers
Name
Receive shift register
Receive data register
Transmit shift register
Transmit data register
Serial mode register
Serial control register
Serial status register
Bit rate register
* Software can write a “0” to clear the status flag bits, but cannot write a “1.”
14.2 Register Descriptions
14.2.1 Receive Shift Register (RSR)
Bit
Read/Write
The RSR receives incoming data bits. When one data character has been received, it is transferred
to the receive data register (RDR).
The CPU cannot read or write the RSR directly.
—
Abbreviation
SCK
RXD
TXD
7
Abbreviation
RSR
RDR
TSR
TDR
SMR
SCR
SSR
BRR
—
6
I/O
Input/output
Input
Output
—
5
R/W
—
R
—
R/W
R/W
R/W
R/(W)*
R/W
247
—
4
Function
Serial clock input and output.
Receive data input.
Transmit data output.
H'87
Initial Value
—
H'00
—
H'FF
H'04
H'0C
H'FF
—
3
—
2
—
H'FFDD
—
H'FFDB
H'FFD8
H'FFDA
H'FFDC
H'FFD9
Address
—
1
—
0