HD643303x Hitachi, HD643303x Datasheet - Page 329

• Manufacturer Part Number: HD643303x
• Description: Hitachi Microcomputer
• Manufacturer: Hitachi

11.1.3 Input/Output Pins
The SCI has serial pins for each channel as listed in table 11-1.
Table 11-1 SCI Pins
Name
Serial clock pin
Receive data pin
Transmit data pin
11.1.4 Register Configuration
The SCI has internal registers as listed in table 11-2. These registers select asynchronous or
synchronous mode, specify the data format and bit rate, and control the transmitter and receiver
sections.
Table 11-2 Registers
Channel
0
1
Notes: 1. Lower 16 bits of the address.
2. Only 0 can be written, to clear flags.
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
Abbreviation
SCK
RxD
TxD
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
314
I/O
Input/output
Input
Output
Abbreviation
SMR
BRR
SCR
TDR
SSR
RDR
SMR
BRR
SCR
TDR
SSR
RDR
Function
SCI clock input/output
SCI receive data input
SCI transmit data output
R/W
R/W
R/W
R/W
R/W
R/(W)
R
R/W
R/W
R/W
R/W
R/(W)
R
*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