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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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TMP93CS44 датащи(PDF) 139 Page - Toshiba Semiconductor |
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TMP93CS44 датащи(HTML) 139 Page - Toshiba Semiconductor |
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139 / 224 page  TMP93CS44/S45 2004-02-10 93CS44-137 Handshake function The serial channels use the CTS0 pin to transmit data in units of frames, thus preventing an overrun error. Use SC0MOD<CTSE0> to enable or disable the handshake function. When CTS0 goes high, data transmission is halted after the completion of the current transmission and is not restarted until CTS0 returns to low. An INTTX0 interrupt is generated to request the CPU for the next data to transmit. When the CPU write the data to the transmit buffer, processing enters standby mode. An RTS pin is not provided, but a handshake function can easily be configured if the receiver sets any port assigned to the RTS function to high (in the receive interrupt routine) after data receive, and requests the transmitter to temporarily halt transmission. Figure 3.9.13 Handshake Function Note 1: If the CTS signal rises during transmission, the next data is not sent after the completion of the current transmission. Note 2: Transmission starts at the first TXDCLK clock fall after the CTS signal falls. Figure 3.9.14 Timing of CTS (Clear to send) TXD CTS RXD RTS (Any port) TMP93CS44/S45 TMP93CS44/S45 Sender Receiver Timing to write Transmission buffer 3 13 14 15 16 1 2 SIOCLK 3 14 15 16 1 2 Start bit Bit0 Note 1 Note 2 Send is suspended CTS0 TXDCLK TXD 4 |
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