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M16C/62 bảng dữ liệu(PDF) 141 Page - Renesas Technology Corp |
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M16C/62 bảng dữ liệu(HTML) 141 Page - Renesas Technology Corp |
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141 / 615 page  Mitsubishi microcomputers M16C / 62A Group SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER Clock synchronous serial I/O mode 1-122 Figure 1.16.11. Typical transmit/receive timings in clock synchronous serial I/O mode • Example of transmit timing (when internal clock is selected) D0 D1 D2 D3 D4 D5 D6 D7 D0 D1 D2 D3 D4 D5 D6 D7 D0 D1 D2 D3 D4 D5 D6 D7 Tc TCLK Stopped pulsing because transfer enable bit = “0” Data is set in UARTi transmit buffer register Tc = TCLK = 2(n + 1) / fi fi: frequency of BRGi count source (f1, f8, f32) n: value set to BRGi Transfer clock Transmit enable bit (TE) Transmit buffer empty flag (Tl) CLKi TxDi Transmit register empty flag (TXEPT) “H” “L” “0” “1” “0” “1” “0” “1” CTSi The above timing applies to the following settings: • Internal clock is selected. • CTS function is selected. • CLK polarity select bit = “0”. • Transmit interrupt cause select bit = “0”. Transmit interrupt request bit (IR) “0” “1” Stopped pulsing because CTS = “H” Transferred from UARTi transmit buffer register to UARTi transmit register Shown in ( ) are bit symbols. Cleared to “0” when interrupt request is accepted, or cleared by software 1 / fEXT Dummy data is set in UARTi transmit buffer register Transmit enable bit (TE) Transmit buffer empty flag (Tl) CLKi RxDi Receive complete flag (Rl) RTSi “H” “L” “0” “1” “0” “1” “0” “1” Receive enable bit (RE) “0” “1” Receive data is taken in Transferred from UARTi transmit buffer register to UARTi transmit register Read out from UARTi receive buffer register The above timing applies to the following settings: • External clock is selected. • RTS function is selected. • CLK polarity select bit = “0”. fEXT: frequency of external clock Transferred from UARTi receive register to UARTi receive buffer register Receive interrupt request bit (IR) “0” “1” D0 D1 D2 D3 D4 D5 D6 D7 D0 D1 D2 D3 D4 D5 Shown in ( ) are bit symbols. Meet the following conditions are met when the CLK input before data reception = “H” • Transmit enable bit “1” • Receive enable bit “1” • Dummy data write to UARTi transmit buffer register Cleared to “0” when interrupt request is accepted, or cleared by software • Example of receive timing (when external clock is selected) |
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