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TMP86FS49AIUG 数据表(PDF) 163 Page - Toshiba Semiconductor |
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TMP86FS49AIUG 数据表(HTML) 163 Page - Toshiba Semiconductor |
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163 / 296 page ![]() Page 147 TMP86FS49AIUG Figure 12-9 Generation of Transmit Data Buffer Empty 12.9.6 Transmit End Flag When data are transmitted and no data is in TD1BUF (UART1SR<TBEP> = “1”), transmit end flag UART1SR<TEND> is set to “1”. The UART1SR<TEND> is cleared to “0” when the data transmit is stated after writing the TD1BUF. Figure 12-10 Generation of Transmit End Flag and Transmit Data Buffer Empty Shift register Data write Data write zzzz xxxx yyyy Start Bit 0 Final bit Stop 1xxxx0 *****1 *1xxxx ****1x *****1 1yyyy0 TD1BUF TXD1 pin UART1SR<TBEP> INTTXD1 interrupt After reading UART1SR writing TD1BUF clears TBEP. Shift register *1yyyy ***1xx ****1x *****1 Stop Start 1yyyy0 Bit 0 TXD1 pin UART1SR<TBEP> UART1SR<TEND> INTTXD1 interrupt Data write for TD1BUF |
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