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參數(shù)資料
| 型號： | M37151 |
| 廠商： | Renesas Technology Corp. |
| 英文描述： | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER |
| 中文描述： | 單芯片8位CMOS微機隱蔽字幕解碼器和屏幕顯示控制器 |
| 文件頁數(shù)： | 43/139頁 |
| 文件大?。?/td> | 1491K |
| 代理商： | M37151 |
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SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
M37151M6/M8/MA/MC/MF-XXXFP, M37151EFFP
MITSUBISHI MICROCOMPUTERS
42
Rev 1.0
8.7 PWM OUTPUT FUNCTION
This microcomputer is equipped with five 8-bit PWMs (PWM0–
PWM4). PWM0–PWM4 have the same circuit structure, an 8-bit reso-
lution with minimum resolution bit width of 4
μ
s (for f(X
IN
) = 8 MHz)
and repeat period of 1024
μ
s (for f(X
IN
) = 8 MHz).
Figure 8.7.1 shows the PWM block diagram. The PWM timing gen-
erating circuit applies individual control signals to PWM0–PWM4 us-
ing f(X
IN
) divided by 2 as a reference signal.
8.7.1 Data Setting
When outputting PWM0–PWM4, set 8-bit output data to the PWMi
register (i means 0 to 4; addresses 0200
16
to 0204
16
).
8.7.2 Transmitting Data from Register to PWM
circuit
Data transfer from the 8-bit PWM register to the 8-bit PWM circuit is
executed when writing data to the register.
The signal output from the 8-bit PWM output pin corresponds to the
contents of this register.
8.7.3 Operating of 8-bit PWM
The following explains the PWM operation.
First, set bit 0 of PWM mode register 1 (address 0208
16
) to “0” (at
reset, bit 0 is already set to “0” automatically), so that the PWM count
source is supplied.
PWM0–PWM4 are also used as pins P0
0
–P0
4
. Set the correspond-
ing bits of the port P0 direction register to “1” (output mode). And
select each output polarity by bit 3 of PWM mode register 1 (address
0208
16
). Then, set bits 4 to 0 of PWM mode register 2 (address
0209
16
) to “1” (PWM output).
The PWM waveform is output from the PWM output pins by setting
these registers.
Figure 8.7.2 shows the 8-bit PWM timing. One cycle (T) is com-
posed of 256 (2
8
) segments. 8 kinds of pulses, relative to the weight
of each bit (bits 0 to 7), are output inside the circuit during 1 cycle.
Refer to Figure 8.7.2 (a). The 8-bit PWM outputs a waveform which
is the logical sum (OR) of pulses corresponding to the contents of
bits 0 to 7 of the 8-bit PWM register. Several examples are shown in
Figure 8.7.2 (b). 256 kinds of output (HIGH area: 0/256 to 255/256)
are selected by changing the contents of the PWM register. An en-
tirely HIGH section cannot be output, i.e. 256/256.
8.7.4 Output after Reset
At reset, the output of ports P0
0
–P0
4
is in the high-impedance state,
and the contents of the PWM register and the PWM circuit are unde-
fined. Note that after reset, the PWM output is undefined until setting
the PWM register.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M37151EFFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER |
| M37151EFSS | 功能描述:DEV MCU/8BIT CMOS EMULATION CHIP RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 過時/停產(chǎn)零件編號 系列:- 標準包裝:1 系列:- 傳感器類型:CMOS 成像，彩色（RGB） 傳感范圍:WVGA 接口:I²C 靈敏度:60 fps 電源電壓:5.7 V ~ 6.3 V 嵌入式:否 已供物品:成像器板 已用 IC / 零件:KAC-00401 相關(guān)產(chǎn)品:4H2099-ND - SENSOR IMAGE WVGA COLOR 48-PQFP4H2094-ND - SENSOR IMAGE WVGA MONO 48-PQFP |
| M37151ERSS | 制造商:Renesas Electronics Corporation 功能描述:DEV MCU/8BIT CMOS EMULATION CHIP - Bulk |
| M37151M6 | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SNGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37151M6_02 | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SNGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
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