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3803L Datasheet(PDF) 54 Page - Renesas Technology Corp |
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3803L Datasheet(HTML) 54 Page - Renesas Technology Corp |
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54 / 119 page  Rev.1.01 Jan 25, 2008 Page 54 of 117 REJ03B0212-0101 3803 Group (Spec.L) Fig 48. Structure of serial I/O3 control registers b7 Transmit buffer empty flag (TBE) 0: Buffer full 1: Buffer empty Receive buffer full flag (RBF) 0: Buffer empty 1: Buffer full Transmit shift completion flag (TSC) 0: Transmit shift in progress 1: Transmit shift completed Overrun error flag (OE) 0: No error 1: Overrun error Parity error flag (PE) 0: No error 1: Parity error Framing error flag (FE) 0: No error 1: Framing error Summing error flag (SE) 0: (OE) U (PE) U (FE)=0 1: (OE) U (PE) U (FE)=1 Not used (returns “1” when read) UART3 control register (UART3CON : address 003316) Character length selection bit (CHAS) 0: 8 bits 1: 7 bits Parity enable bit (PARE) 0: Parity checking disabled 1: Parity checking enabled Parity selection bit (PARS) 0: Even parity 1: Odd parity Stop bit length selection bit (STPS) 0: 1 stop bit 1: 2 stop bits P35/TXD3 P-channel output disable bit (POFF) 0: CMOS output (in output mode) 1: N-channel open drain output (in output mode) Not used (return “1” when read) BRG count source selection bit (CSS) 0: f(XIN) (f(XCIN) in low-speed mode) 1: f(XIN)/4 (f(XCIN)/4 in low-speed mode) Serial I/O3 synchronous clock selection bit (SCS) 0: BRG output divided by 4 when clock synchronous serial I/O3 is selected, BRG output divided by 16 when UART is selected. 1: External clock input when clock synchronous serial I/O3 is selected, external clock input divided by 16 when UART is selected. SRDY3 output enable bit (SRDY) 0: P37 pin operates as normal I/O pin 1: P37 pin operates as SRDY3 output pin Transmit interrupt source selection bit (TIC) 0: Interrupt when transmit buffer has emptied 1: Interrupt when transmit shift operation is completed Transmit enable bit (TE) 0: Transmit disabled 1: Transmit enabled Receive enable bit (RE) 0: Receive disabled 1: Receive enabled Serial I/O3 mode selection bit (SIOM) 0: Clock asynchronous (UART) serial I/O 1: Clock synchronous serial I/O Serial I/O3 enable bit (SIOE) 0: Serial I/O3 disabled (pins P34 to P37 operate as normal I/O pins) 1: Serial I/O3 enabled (pins P34 to P37 operate as serial I/O3 pins) Serial I/O3 control register (SIO3CON : address 003216) Serial I/O3 status register (SIO3STS : address 003116) b0 b7 b0 b7 b0 |
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