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型號(hào)：	M32185F4VFP
元件分類：	微控制器/微處理器
英文描述：	32-BIT, FLASH, 80 MHz, RISC MICROCONTROLLER, PQFP144
封裝：	20 X 20 MM, 0.50 MM PITCH, PLASTIC, LQFP-144
文件頁(yè)數(shù)：	387/1032頁(yè)
文件大?。?/td>	5750K
代理商：	M32185F4VFP

10.4 TIO (Input/Output-Related 16-Bit Timer)

MULTIJUNCTION TIMERS

32185/32186 Group Hardware Manual

Rev.1.10 REJ09B0235-0110 May 15, 07

10.4.14 Operation in TIO Continuous Output Mode (without Correction Function)

(1) Outline of TIO continuous output mode

In continuous output mode, the timer counts down starting from the set value of the counter and the next

cycle when the counter underflows, it is loaded with the value that " the reload 0 register -1." Thereafter, this

operation is repeated each time the counter underflows, thus generating consecutive pulses whose wave-

form is inverted in width of " reload 0 register set value + 1."

When the timer is enabled (by writing to the enable bit in software or by external input) after setting the

counter and reload 0 register, it starts counting down from the counter’s set value synchronously with the

count clock and when the minimum count is reached, generates an underflow. The cycle after this under-

flow causes the counter to be loaded with the content of " the reload 0 register -1" and start counting over

again. Thereafter, this operation is repeated each time an underflow occurs. To stop the counter, disable

count by writing to the enable bit in software. The timing for reloading to counter is the cycle after underflow.

The F/F output waveform in continuous output mode is inverted (F/F output level changes from "L" to "H" or

vice versa) at startup and upon underflow, generating a waveform of consecutive pulses until the timer

stops counting.

Furthermore, it is possible to generate an interrupt request and a DMA transfer request (for only the TIO8

and TIO9) each time the counter underflows.

The " counter set value + 1" and " reload 0 register set value + 1" are effective as count values. (For counting

operation, see also Section 10.3.11, “Operation of TOP Continuous Output Mode.”)

(2) Precautions about using TIO continuous output mode

The following describes precautions to be observed when using TIO continuous output mode.

If the timer is enabled by external input in the same clock period as count is disabled by writing to the

enable bit, the latter has priority so that count is disabled.

If the counter is accessed for read at the cycle of underflow, the counter value is read out as H’FFFF but

changes to "reload register value -1" at the next count clock timing.

Because the timer operates synchronously with the count clock, up to one count clock-dependent delay

is generated before F/F output is inverted after writing to the enable bit.

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相關(guān)代理商/技術(shù)參數(shù)	參數(shù)描述
M32186F8VFP	制造商:Renesas Electronics Corporation 功能描述:
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M32192F8TFP#U0	制造商:Renesas Electronics Corporation 功能描述:MCU 32-bit M32R RISC 1024KB Flash 3.3V/5V 144-Pin LQFP
M32192F8VFP	制造商:Renesas Electronics Corporation 功能描述:
M321-SERIES	制造商:未知廠家制造商全稱:未知廠家功能描述:Peripheral IC

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