Uart Interface - Holtek HT67F2350 Manual

UART Interface

These devices contain up to three integrated full-duplex asynchronous serial communications UART
interfaces that enable communication with external devices that contain a serial interface. The
UART function has many features and can transmit and receive data serially by transferring a frame
of data with eight or nine data bits per transmission as well as being able to detect errors when the
data is overwritten or incorrectly framed. The UART function possesses its own internal interrupt
which can be used to indicate when a reception occurs or when a transmission terminates.
Each integrated UART function contains the following features:
• Full-duplex, asynchronous communication
• 8 or 9 bits character length
• Even, odd or no parity options
• One or two stop bits
• Baud rate generator with 8-bit prescaler
• Parity, framing, noise and overrun error detection
• Support for interrupt on address detect (last character bit=1)
• Separately enabled transmitter and receiver
• 2-byte Deep FIFO Receive Data Buffer
• RX pin wake-up function
• Transmit and receive interrupts
• Interrupts can be initialized by the following conditions:
Transmitter Empty
♦
Transmitter Idle
♦
Receiver Full
♦
Receiver Overrun
♦
Address Mode Detect
♦
Transmitter Shift Register (TSRn)
MSB
..............................
TX Register (TXRn)
Rev. 1.60
Advanced A/D Flash MCU with LCD & EEPROM
Decive
HT67F2350/HT67F2360
HT67F2370/HT67F2390
LSB TXn Pin RXn Pin
Baud Rate
f
H
Generator n
Data to be transmitted
MCU Data Bus
UART Data Transfer Block Diagram
204
HT67F2350/HT67F2360
HT67F2370/HT67F2390
UART Interface
2
3
Receiver Shift Register (RSRn)
MSB
..............................
RX Register (RXRn)
Buffer
Data received
May 16, 2019
LSB