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參數(shù)資料
| 型號(hào)： | M37754 |
| 廠商： | Mitsubishi Electric Corporation |
| 英文描述： | SINGLE-CHIP 16BIT CMOS MICROCOMPUTER |
| 中文描述： | 單芯片16位微機(jī)的CMOS |
| 文件頁(yè)數(shù)： | 31/114頁(yè) |
| 文件大?。?/td> | 1116K |
| 代理商： | M37754 |
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31
PRELIMINARY
Notice: This is not a final specification.
Some parametric limits are subject to change.
MITSUBISHI MICROCOMPUTERS
M37754M8C-XXXGP, M37754M8C-XXXHP
M37754S4CGP, M37754S4CHP
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(4) Pulse width modulation mode [11]
Figure 32 shows the bit configuration of the timer Ai mode register
during pulse width modulation mode. In pulse width modulation
mode, bits 0, 1, and 2 must be set to “1”.
Bit 5 is used to determine whether to perform 16-bit length pulse
width modulator or 8-bit length pulse width modulator. 16-bit length
pulse width modulator is selected when bit 5 is “0” and 8-bit length
pulse width modulator is selected when it is “1”. The 16-bit length
pulse width modulator is described first.
The pulse width modulator can be started with a software trigger or
with an input signal from a TAi
IN
pin (external trigger).
The software trigger mode is selected when bit 4 is “0”.
Pulse width modulator is started and a pulse is output from TAi
OUT
when the timer Ai start bit is set to “1”.
The external trigger mode is selected when bit 4 is “1”.
Pulse width modulation starts when a trigger signal is input from the
TAi
IN
pin when the timer Ai start bit is “1”. Whether to trigger at the
fall or rise of the trigger signal is determined by bit 3. The trigger is at
the fall of the trigger signal when bit 3 is “0” and at the rise when it is
“1”.
When data is written to timer Ai with the pulse width modulator
halted, it is written to the reload register and the counter.
Then when the timer Ai start bit is set to “1” and a software trigger or
an external trigger is issued to start modulation, the waveform shown
in Figure 33 is output continuously.
Once modulation is started, triggers are not accepted. If the value in
the reload register is m, the duration “H” of pulse is
×
m
and the output pulse period is
×
(2
16
–1).
An interrupt request signal is generated and the interrupt request bit
in the timer Ai interrupt control register is set at each fall of the output
pulse.
The width of the output pulse is changed by updating timer data. The
update can be performed at any time. The output pulse width is
changed at the rise of the pulse after data is written to the timer.
The contents of the reload register are transferred to the counter just
before the rise of the next pulse so that the pulse width is changed
from the next output pulse.
Undefined data is read when timer Ai is read.
The 8-bit length pulse width modulator is described next.
The 8-bit length pulse width modulator is selected when the timer Ai
mode register bit 5 is “1”.
The reload register and the counter are both divided into 8-bit halves.
The low-order 8 bits function as a prescaler and the high-order 8 bits
1
selected clock frequency
1
selected clock frequency
function as the 8-bit length pulse width modulator. The prescaler
counts the clock selected by bits 6 and 7. A pulse is generated
when the counter reaches 0000
16
as shown in Figure 34. At the
same time, the contents of the reload register is transferred to the
counter and count is continued.
Fig. 32 Timer Ai mode register bit configuration during pulse width
modulation mode
7 6 5 4 3 2 1 0
1
1
1
1 1 : Always “11” in pulse width modulation
mode
1 : Always “1” in pulse width modulation
mode
0
×
: Software trigger
1 0 : Trigger at the falling of TAi
IN
input
1 1 : Trigger at the rising of TAi
IN
input
0 : 16-bit pulse width modulator
1 : 8-bit pulse width modulator
Clock source select bit
0 0 : Select Pf
2
0 1 : Select Pf
16
1 0 : Select Pf
64
1 1 : Select Pf
512
Timer A0 mode register
Timer A1 mode register
Timer A2 mode register
Timer A3 mode register
Timer A4 mode register
Addresses
56
16
57
16
58
16
59
16
5A
16
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| M37754M8C | Single Chip 16 Bits CMOS Microcomputer(16位單片機(jī)) |
| M37902F8CHP | DIODE SCHOTTKY DUAL COMMON-ANODE 25V 200mW 0.32V-vf 200mA-IFM 1mA-IF 2uA-IR SOT-23 3K/REEL |
| M37902FGCGP | SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M37902FCCHP | SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M37902FGCHP | DIODE SCHOTTKY DUAL COMMON-ANODE 25V 150mW 0.32V-vf 200mA-IFM 1mA-IF 2uA-IR SOT-523 3K/REEL |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M37754FFCGP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER FLASH MEMORY VERSION |
| M37754FFCHP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER FLASH MEMORY VERSION |
| M37754M6C-XXXGP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M37754M6C-XXXHP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M37754M8C-XXXGP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 16BIT CMOS MICROCOMPUTER |
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