HD6433044 Hitachi Semiconductor, HD6433044 Datasheet - Page 451

• Manufacturer Part Number: HD6433044
• Description: (HD64 Series) Hitachi Single-Chip Microcomputer
• Manufacturer: Hitachi Semiconductor

13.1.3 Input/Output Pins
The SCI has serial pins for each channel as listed in table 13-1.
Table 13-1 SCI Pins
Channel
0
1
13.1.4 Register Configuration
The SCI has internal registers as listed in table 13-2. These registers select asynchronous or
synchronous mode, specify the data format and bit rate, and control the transmitter and receiver
sections.
Table 13-2 Registers
Channel
0
1
Notes: 1. Lower 16 bits of the address.
2. Only 0 can be written, to clear flags.
Name
Serial clock pin
Receive data pin
Transmit data pin
Serial clock pin
Receive data pin
Transmit data pin
Address
H'FFB0
H'FFB1
H'FFB2
H'FFB3
H'FFB4
H'FFB5
H'FFB8
H'FFB9
H'FFBA
H'FFBB
H'FFBC
H'FFBD
*1
Name
Serial mode register
Bit rate register
Serial control register
Transmit data register
Serial status register
Receive data register
Serial mode register
Bit rate register
Serial control register
Transmit data register
Serial status register
Receive data register
Abbreviation
SCK
RxD
TxD
SCK
RxD
TxD
0
1
0
1
0
1
440
Input/output
Input
Output
Input/output
Input
Output
Abbreviation
I/O
SMR
BRR
SCR
TDR
SSR
RDR
SMR
BRR
SCR
TDR
SSR
RDR
Function
SCI
SCI
SCI
SCI
SCI
SCI
R/W
R/W
R/W
R/W
R/W
R/(W)
R
R/W
R/W
R/W
R/W
R/(W)
R
0
0
0
1
1
1
clock input/output
receive data input
transmit data output
clock input/output
receive data input
transmit data output
*2
*2
Initial Value
H'00
H'FF
H'00
H'FF
H'84
H'00
H'00
H'FF
H'00
H'FF
H'84
H'00