- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄382552 > ST72371 (意法半導(dǎo)體) 8-Bit MCUs with 16K ROM/OTP/EPROM, 512 Bytes RAM, ADC, DAC (PWM), Timer, IIC and SCI(8位微控制器(8M)) PDF資料下載
參數(shù)資料
| 型號： | ST72371 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 8-Bit MCUs with 16K ROM/OTP/EPROM, 512 Bytes RAM, ADC, DAC (PWM), Timer, IIC and SCI(8位微控制器(8M)) |
| 中文描述： | 8 - 16K的光碟/雙層/存儲器，512字節(jié)RAM，ADC和DAC的器（PWM），定時器，IIC和脊髓損傷（8位微控制器（8米）位MCU） |
| 文件頁數(shù)： | 69/94頁 |
| 文件大?。?/td> | 642K |
| 代理商： | ST72371 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁當(dāng)前第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁
69/94
ST72371/ST72372
PWM/BRM GENERATOR
(Cont’d)
BRM Generation
The BRM bits allow the addition of a pulse to wid-
en a standard PWM pulse for specific PWM cy-
cles. This has the effect of “fine-tuning” the PWM
Duty cycle (without modifying the base dutycycle),
thus, with the external filtering, providing additional
fine voltage steps.
The incremental pulses (with duration of T
CPU
) are
added to the beginning of the original PWM pulse.
The PWM intervals which are added to are speci-
fied in the 4-bit BRM register and are encoded as
shown in the following table. The BRM values
shown may be combined together to provide a
summation of the incremental pulse intervals
specified.
The pulse increment corresponds to the PWM res-
olution.
For example,if
– Data 18h is written to the PWM register
– Data 06h (00000110b) is written to the BRM reg-
ister
– with a 8MHz internal clock (125ns resolution)
Then 3.0
μ
s-long pulse will be output at 8
μ
s inter-
vals, except for cycles numbered 2,4,6,10,12,14,
where the pulse is broadened to 3.125
μ
s.
Note.
If 00h is written to both PWM and BRM reg-
isters, the generator output will remain at “0”. Con-
versely, if both registers hold data 3Fh and 0Fh,
respectively, the output will remain at “1” for all in-
tervals #1 to #15, but it will return to zero at interval
#0 for an amount of time corresponding to the
PWM resolution (T
CPU
).
An output can be set to a continuous “1” level by
clearing the PWM and BRM values and setting
POL = “1” (inverted polarity) in the PWM register.
This allows a PWM/BRM channel to be used as an
additional I/O pin if the DAC function is not re-
quired.
Table 19. Bit BRM Added Pulse Intervals
(Interval #0 not selected).
Figure 30. BRM pulse addition (PWM > 0)
BRM 4 - Bit Data
0000
0001
0010
0100
1000
Incremental Pulse Intervals
none
i = 8
i = 4,12
i = 2,6,10,14
i = 1,3,5,7,9,11,13,15
T
CPU
x 64
T
CPU
x 64
T
CPU
x 64
T
CPU
increment
m=1
m=0
m=2
T
CPU
x 64
m=15
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ST72372 | 8-Bit MCUs with 16K ROM/OTP/EPROM, 512 Bytes RAM, ADC, DAC (PWM), Timer, IIC and SCI(8位微控制器(8M)) |
| ST72681 | USB 2.0 HIGH-SPEED 8-BIT MCU FLASH DRIVE CONTROLLER |
| ST72753L4 | 8-BIT MCU FOR MONITORS WITH UP TO 32K ROM, 1K RAM, ADC, TIMER, SYNC, PWM/BRM, DDC/DMA & I2C |
| ST72753L5 | 8-BIT MCU FOR MONITORS WITH UP TO 32K ROM, 1K RAM, ADC, TIMER, SYNC, PWM/BRM, DDC/DMA & I2C |
| ST72753L6 | 8-BIT MCU FOR MONITORS WITH UP TO 32K ROM, 1K RAM, ADC, TIMER, SYNC, PWM/BRM, DDC/DMA & I2C |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ST72371N4B1 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT MCUs WITH 16K ROM/OTP/EPROM,512 BYTES RAM, ADC, DAC (PWM), TIMER, I2C AND SCI |
| ST72371N4B1/XXX | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:MICROCONTROLLER|8-BIT|ST72 CPU|CMOS|SDIP|56PIN|PLASTIC |
| ST72371N4T1 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT MCUs WITH 16K ROM/OTP/EPROM,512 BYTES RAM, ADC, DAC (PWM), TIMER, I2C AND SCI |
| ST72372 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT MCUs WITH 16K ROM/OTP/EPROM,512 BYTES RAM, ADC, DAC (PWM), TIMER, I2C AND SCI |
| ST72372J4B1 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT MCUs WITH 16K ROM/OTP/EPROM,512 BYTES RAM, ADC, DAC (PWM), TIMER, I2C AND SCI |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。