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Motore di ricerca datesheet componenti elettronici |
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Motore di ricerca datesheet componenti elettronici |
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TMP86CS44UG Scheda tecnica(PDF) 136 Page - Toshiba Semiconductor |
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TMP86CS44UG Scheda tecnica(HTML) 136 Page - Toshiba Semiconductor |
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136 / 172 page  Page 126 12. Asynchronous Serial interface (UART ) 12.2 Control TMP86CS44UG 12.2 Control UART is controlled by the UART Control Registers (UARTCR1, UARTCR2). The operating status can be moni- tored using the UART status register (UARTSR). Note 1: When operations are disabled by setting TXE and RXE bit to “0”, the setting becomes valid when data transmit or receive complete. When the transmit data is stored in the transmit data buffer, the data are not transmitted. Even if data transmit is enabled, until new data are written to the transmit data buffer, the current data are not transmitted. Note 2: The transmit clock and the parity are common to transmit and receive. Note 3: UARTCR1<RXE> and UARTCR1<TXE> should be set to “0” before UARTCR1<BRG> is changed. Note: When UARTCR2<RXDNC> = “01”, pulses longer than 96/fc [s] are always regarded as signals; when UARTCR2<RXDNC> = “10”, longer than 192/fc [s]; and when UARTCR2<RXDNC> = “11”, longer than 384/fc [s]. UART Control Register1 UARTCR1 (0020H) 76 543 210 TXE RXE STBT EVEN PE BRG (Initial value: 0000 0000) TXE Transfer operation 0: 1: Disable Enable Write only RXE Receive operation 0: 1: Disable Enable STBT Transmit stop bit length 0: 1: 1 bit 2 bits EVEN Even-numbered parity 0: 1: Odd-numbered parity Even-numbered parity PE Parity addition 0: 1: No parity Parity BRG Transmit clock select 000: 001: 010: 011: 100: 101: 110: 111: fc/13 [Hz] fc/26 fc/52 fc/104 fc/208 fc/416 TC3 ( Input INTTC3) fc/96 UART Control Register2 UARTCR2 (0021H) 765 432 1 0 RXDNC STOPBR (Initial value: **** *000) RXDNC Selection of RXD input noise rejection time 00: 01: 10: 11: No noise rejection (Hysteresis input) Rejects pulses shorter than 31/fc [s] as noise Rejects pulses shorter than 63/fc [s] as noise Rejects pulses shorter than 127/fc [s] as noise Write only STOPBR Receive stop bit length 0: 1: 1 bit 2 bits |
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