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XR88C92 Datasheet(PDF) 4 Page - Exar Corporation |
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XR88C92 Datasheet(HTML) 4 Page - Exar Corporation |
4 / 32 page XR88C92/192 4 Rev. 1.31 SYMBOL DESCRIPTION (* 44 pin TQFP) RXA,RXB 35,11 31,10 29,5 I Serial data input. The serial information (data) received from serial port to XR88C92/192 receive input circuit. A mark (high) is logic one and a space (low) is logic zero.This input must be held at logic one when idle and during power down. TXA, TXB 33,13 30,11 28,6 O Serial data output. The serial data is transmitted via this pin with additional start , stop and parity bits. This output will be held in mark (high) state during reset, local loop back mode or when the transmitter is disabled. RESET 38 34 32 I Master Reset (active high). A high on this pin will reset all the outputs and internal registers. The transmitter output and the receiver input will be disabled during reset time. OP0 32 29 27 O Multi-purpose output. General purpose output or Channel A Request-To-Send (-RTSA active low). OP1 14 12 7 O Multi-purpose output. General purpose output or Channel B Request-To-Send (-RTSB active low). OP2 31 28 26 O Multi-purpose output. General purpose output or one of the following functions can be selected for this output pin by programming the Output Port Confiuration Register bits 1,0; TxAClk1 -Transmit 1X clock. TxAClk16 -Transmit 16X clock RxAClk1 -Receive 1X clock OP3 15 13 8 O Multi-purpose output. General purpose output or one of the following functions can be selected for this output pin by programming the Output Port Confiuration Register bits 3,2; C/T -Counter timer output (Open drain output) TxBClk1 -Transmit 1X clock RxBClk1 -Receive 1X clock OP4 30 27 25 O Multi-purpose output. General purpose output or one of the following functions can be selected for this output pin by programming the Output Port Confiuration Register bit 4; -RxARDY -Receive ready signal (Open drain output) -RxAFULL - Receive FIFO full signal (Open drain output) Symbol Pin Signal Pin Description 44 40 44* type |
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