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3822 Datasheet(PDF) 119 Page - Renesas Technology Corp |
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3822 Datasheet(HTML) 119 Page - Renesas Technology Corp |
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119 / 328 page  2.3 Timer X and timer Y APPLICATION 2–53 3822 GROUP USER’S MANUAL sTimer X counter The X counter counts the count source. Figure 2.3.13 shows the structure of the timer X counter. The contents of the X counter are decremented by 1 each time a count source is input. The division ratio of the counter is represented by the following expression. Division ratio of the X counter = Fig. 2.3.13 Structure of timer X counter 1 the X counter initial value + 1 Notes 1 : Write both registers in the order of TXL and TXH. b7 b6 b5 b4 b3 b2 b1 b0 Timer X (high-order, low-order) (TXH, TXL) [Address 21 16, 2016] B Functions At reset R Timer X (high-order, low-order) 0 to 7 •Set “000016 to FFFF16” as timer X count value. •The value of the X counter is decremented by 1 each time a count source is input. •When the timer X write control bit is “0,” the values of TXH and TXL are set to the respec- tive X latches at the same time. •The values of each X counter are read out by reading the respective timer Xs. 1 qTimer X counter 2 : Read both registers in the order of TXH and TXL. W |
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