HD6433308 HITACHI [Hitachi Semiconductor], HD6433308 Datasheet - Page 192
HD6433308
Manufacturer Part Number
HD6433308
Description
Hitachi Single-Chip MicroComputer
Manufacturer
HITACHI [Hitachi Semiconductor]
Datasheet
1.HD6433308.pdf
(349 pages)
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9.1 Overview
The H8/330 chip includes a single-channel serial communication interface (SCI) for transferring
serial data to and from other chips. Either the synchronous or asynchronous communication mode
can be selected. Communication control functions are provided by internal registers.
9.1.1 Features
The features of the on-chip serial communication interface are:
• Separate pins for asynchronous and synchronous modes
• Full duplex communication
• Built-in baud rate generator
• Internal or external clock source
• Three interrupts
– Asynchronous mode
– Synchronous mode
The transmitting and receiving sections are independent, so the SCI can transmit and receive
simultaneously. Both the transmit and receive sections use double buffering, so continuous data
transfer is possible in either direction.
Any specified baud rate can be generated.
The baud rate generator can operate on an internal clock source, or an external clock signal input
at the ASCK or CSCK pin.
Transmit-end, receive-end, and receive-error interrupts are requested independently.
The SCI can communicate with a UART (Universal Asynchronous Receiver/Transmitter),
ACIA (Asynchronous Communication Interface Adapter), or other chip that employs standard
asynchronous serial communication. Eight data formats are available.
– Data length: 7 or 8 bits
– Stop bit length: 1 or 2 bits
– Parity: Even, odd, or none
– Error detection: Parity, overrun, and framing errors
The SCI can communicate with chips able to perform clocked serial data transfer.
– Data length: 8 bits
– Error detection: Overrun errors
Section 9. Serial Communication Interface
179
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