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SAB82525H Datasheet(PDF) 64 Page - Infineon Technologies AG |
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SAB82525H Datasheet(HTML) 64 Page - Infineon Technologies AG |
64 / 126 page Semiconductor Group 64 SAB 82525 SAB 82526 SAF 82525 SAF 82526 CTS Signal Clock Mode 5 In clock mode 5 the CTS signal is evaluated not only in the time-slot "window", but also between the time-slot "windows". CTS must not be disabled during the transmission of a frame. Even between the time-slot "windows" CTS has to be active until the transmission of the frame has been completed. Thus, CTS cannot be used to select/deselect particular time- slot "windows" for HSCX. Note: In the case where permission to transmit is not required, the CTSA/CTSB inputs can be connected directly to VSS. Additionally, any state transition on the CTS input pin will generate an interrupt indicated via the EXIR register, if this function is enabled by setting the CIE bit in the CCR2 register. Figure 31 RTS-CTS Handshaking ITT00244 Sampling CTS T CLK x xD T RTS Carrier Detect (CD) Receiver Control Similar to the RTS/CTS control for the transmitter, the HSCX supports the carrier detect modem control function for the serial receivers, if the Carrier Detect Auto Start (CAS) function is programmed setting the CAS bit in the XBCH register. This function is always available in clock modes 0, 2, 3 via the A ×CLK pin, and in clock modes 4, 6, 7 via the T × CLK pin only if it has been programmed as input clearing the TIO bit in the CCR2 register. In clock mode 1 the CD function is not supported (see table 6 for an overview). If the CAS function is selected, the respective HDLC receiver is enabled and data reception is started when an high level is sampled at the CD input. |
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