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參數(shù)資料
| 型號(hào)： | M34518M4-XXXSP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PDIP32 |
| 封裝： | 0.400 INCH, 1.78 MM PITCH, PLASTIC, SDIP-32 |
| 文件頁(yè)數(shù)： | 55/157頁(yè) |
| 文件大小： | 1783K |
| 代理商： | M34518M4-XXXSP |
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ML610Q411/ML610Q412/ML610Q415 User’s Manual
Chapter 10
Timers
10 – 21
10.3.2
16-bit timer frequency measurement mode operation
The frequency measurement mode in 16-bit timer 2&3, is used to count the frequency of 500kHz RC oscillation clock
which typically has temperature variation and production tolerance.
Using the frequency measurement mode can make better accuracy for uart baud-rate clock or timer function.
(1) Reading the count data, caluculating and setting it to uart communication baud-rate registers, can make more
accurate baud-rate clock.
(2) Reading the count data, caluculating and setting it to a timer data register, can make more accurate timing in normal
timer mode.
Note:
This function is not available on ML610Q415 because it does not have low-speed crystal oscillation clock.
Figure 10-3 shows the operation timing in frequency measurement mode.
Figure 10-3
Operation Timing in frequency measurement mode
(1) High-speed clock (HSCLK, HTBCLK) has to be in oscillating state by conrolling with FCONn registers.
And also set HTBDR register (High-speed Time Base counter Devide Register) per necessory.
(2) Reset both T2RUN bit (bit0 of TM2CON1 register) and T3RUN bit (bit0 of TM3CON1 register) to “0” to
stop the timer. And then, check both T2STAT bit (bit7 of TM2CON1 register) and T3STAT bit (bit7 of
TM3CON1 register) are “0” for making certain the timer stops.
(3) Set T23MFM bit (bit3 of TM2CON0 register) to “1” (Frequency measurement mode), set T23M16 bit
(bit2of TM2CON0 register) to “1” (16bit mode) and set T2CS1-0 bits(bit1/0 of TM2CON0 register) to
“01”(HTBCLK mode).
i Hj
FFFF
N1
0000
T23MFM
T23M16
T2RUN
T2STAT
TM3INT
437C
64Hz
(3)
(5)
(6)
(7)
(8)
437/32768S
{TM3C,TM2C}
相關(guān)PDF資料 |
PDF描述 |
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| M34519E8FP | 4-BIT, OTPROM, 6 MHz, MICROCONTROLLER, PDSO42 |
| M34519M8-XXXFP | 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PDSO42 |
| M34520M8A-XXXFP | 4-BIT, MROM, 4 MHz, MICROCONTROLLER, PQFP64 |
| M34520E8-XXXSP | 4-BIT, OTPROM, 4 MHz, MICROCONTROLLER, PDIP64 |
| M34520E8-XXXFP | 4-BIT, OTPROM, 4 MHz, MICROCONTROLLER, PQFP64 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M34518M6-XXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| M34518M8-XXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| M34519E8FP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:4-BIT CISC SINGLE-CHIP MICROCOMPUTER 720 FAMILY / 4500 SERIES |
| M34519M6-XXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:4-BIT CISC SINGLE-CHIP MICROCOMPUTER 720 FAMILY / 4500 SERIES |
| M34519M8-XXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:4-BIT CISC SINGLE-CHIP MICROCOMPUTER 720 FAMILY / 4500 SERIES |
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