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T81L0006A Datasheet(PDF) 10 Page - Taiwan Memory Technology |
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T81L0006A Datasheet(HTML) 10 Page - Taiwan Memory Technology |
10 / 21 page TE CH tm T81L0006A/B TM Technology Inc. reserves the right P. 10 Publication Date: AUG. 2005 to change products or specifications without notice. Revsion : B mode 1 and 3. RCLK=0 causes timer1 overflow to be used for the receive clock T2CON.4: TCLK Transmit clock flag. When set, cause the serial port to use timer2 overflow pulses for its transmit clock in mode 1 and 3. TCLK=0 causes timer1 overflow to be used for the transmit clock T2CON.3: EXEN2 Timer2 external enable flag. When set, allows a capture or reload to occur as a result of a negative transition on T2EX if timer2 is not being used to clock the serial port. EXEN2=0 causes timer2 to ignore events at T2EX. T2CON.2: Start/stop control for timer2. A logic 1 starts the timer T2CON.1: Timer or counter select. (Timer 2) , 0 as internal timer T2CON.0: Capture/Reload flag. When set, captures will occur on negative transitions at T2EX if EXEN2=1. When cleared, auto reloads will occur either with timer2 overflow or negative transitions at T2EX when EXEN2=1. When either RCLK=1 or TCLK=1, this bit is ignored and the timer is forced to auto-reload on timer2 overflow. Note then the baudrates for transmit and receive can be simultaneously different. Setting RCLK and/or TCLK puts Timer2 into its baudrate generator mode. The baudrate generator mode is similar to the auto reload mode, in that a rollover is TH2 causes the Timer2 registers to be reload with the 16 bit value in registers RCAP2H and RCAP2L, which are preset by software given by the formula. Baudrate= (Timer2 overflow rate)/16 =(Oscillator Frequency) / (32*(65536-(RCAP2H,RCAP2L))) Serial Interface Timing Diagram S1.........S6 S1.........S6 S1.........S6 S1.........S6 S1.........S6 S1.........S6 S1.........S6 S1.........S6 S1.........S6 S1.........S6 ALE D0 D1 D2 D3 D4 D5 D6 D7 RXD TXD D0 D1 D2 D3 D4 D5 D6 D7 RXD TXD Receive Shift Write to SCON, Clear RI RI Write to SBUF Send Shift Serial Port Mode 0 |
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