參數(shù)資料
型號: UPD70741
廠商: NEC Corp.
元件分類: 16位微控制器
英文描述: V821TM 32-/16-BIT MICROPROCESSOR
中文描述: V821TM 32-/16-BIT微處理器
文件頁數(shù): 37/112頁
文件大?。?/td> 605K
代理商: UPD70741
μ
PD70741
37
8. SERIAL INTERFACE FUNCTION
8.1 Features
The V821 provides two transmission and reception channels as part of its serial interface function.
The two interface modes listed below are supported, one channel being provided for each mode. The two modes
operate independently of each other.
(1) Asynchronous serial interface (UART)
(2) Synchronous serial interface (CSI)
In UART mode, one-byte serial data is transmitted or received after a start bit, and full-duplex communication is
enabled.
In CSI mode, data is transferred using three signal lines (three-wire serial I/O): the serial clock (SCLK), serial input
(SI), and serial output (SO).
8.2 Asynchronous Serial Interface (UART)
8.2.1 Features
Transfer rate 110 bps to 38 400 bps
781 Kbps maximum
Full-duplex communication
Two-pin configuration TXD : Transmission data output pin
RXD : Reception data input pin
Reception error detection function
Parity error
Framing error
Overrun error
Interrupt source (3 types)
Reception error interrupt (INTSER)
Reception completion interrupt (INTSR)
Transmission completion interrupt (INTST)
The character length for transmission and reception data is specified upon ASIM reception.
Character length : 7 or 8 bits
9 bits (when an extended bit is used)
Parity function: Odd parity, even parity, zero parity, without parity
Transmission stop bit: 1 or 2 bits
On-chip baud rate generator
(when BRG is used with
φ
= 25 MHz)
(when
φ
/2 is used with
φ
= 25 MHz)
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