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AT91 Datasheet(PDF) 122 Page - ATMEL Corporation |
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AT91 Datasheet(HTML) 122 Page - ATMEL Corporation |
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122 / 153 page  122 AT91X40 Series 1354D–ATARM–08/02 TC: Timer Counter The AT91X40 Series features a Timer Counter block which includes three identical 16- bit timer counter channels. Each channel can be independently programmed to perform a wide range of functions including frequency measurement, event counting, interval measurement, pulse generation, delay timing and pulse width modulation. Each Timer Counter channel has 3 external clock inputs, 5 internal clock inputs, and 2 multi-purpose input/output signals which can be configured by the user. Each channel drives an internal interrupt signal which can be programmed to generate processor interrupts via the AIC (Advanced Interrupt Controller). The Timer Counter block has two global registers which act upon all three TC channels. The Block Control Register allows the three channels to be started simultaneously with the same instruction. The Block Mode Register defines the external clock inputs for each Timer Counter channel, allowing them to be chained. Figure 43. TC Block Diagram Timer Counter Channel 0 Timer Counter Channel 1 Timer Counter Channel 2 SYNC Parallel IO Controller TC1XC1S TC0XC0S TC2XC2S INT INT INT TIOA0 TIOA1 TIOA2 TIOB0 TIOB1 TIOB2 XC0 XC1 XC2 XC0 XC1 XC2 XC0 XC1 XC2 TCLK0 TCLK1 TCLK2 TCLK0 TCLK1 TCLK2 TCLK0 TCLK1 TCLK2 TIOA1 TIOA2 TIOA0 TIOA2 TIOA0 TIOA1 Advanced Interrupt Controller TCLK0 TCLK1 TCLK2 TIOA0 TIOB0 TIOA1 TIOB1 TIOA2 TIOB2 Timer Counter Block TIOA TIOB TIOA TIOB TIOA TIOB SYNC SYNC MCK/2 MCK/8 MCK/32 MCK/128 MCK/1024 |
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