參數(shù)資料
型號: ST92186B3BK
廠商: STMICROELECTRONICS
元件分類: 微控制器/微處理器
英文描述: 16-BIT, MROM, 24 MHz, MICROCONTROLLER, PDIP32
封裝: PLASTIC, SDIP-32
文件頁數(shù): 31/148頁
文件大?。?/td> 1664K
代理商: ST92186B3BK
Obsolete
Product(s)
- Obsolete
Product(s)
Obsolete
Product(s)
- Obsolete
Product(s)
126/148
ST92186B - VOLTAGE SYNTHESIS TUNING CONVERTER (VS)
VOLTAGE SYNTHESIS (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 duty cycle),
thus, with the external filtering, providing additional
fine voltage steps.
The incremental pulses (with duration of TINTCLK/
4) are added to the beginning of the original PWM
pulse and thus cause the PWM high time to be ex-
tended by this time with a corresponding reduction
in the low time. The PWM intervals which are add-
ed to are specified in the lower 7 bits of the tuning
word and are encoded as shown in the following
table.
Table 27. 7-Bit BRM Pulse Addition Positions
The BRM values shown may be combined togeth-
er to provide a summation of the incremental pulse
intervals specified.
The pulse increment corresponds to the PWM res-
olution.
Figure 62. Simplified Filtered Voltage Output Schematic with BRM added
Fine Tuning
No. of Pulses added at the
following Cycles
0000001
64
0000010
32, 96
0000100
16, 48, 80, 112
0001000
8, 24,... 104, 120
0010000
4, 12,... 116, 124
0100000
2, 6,... 122, 126
1000000
1, 3,... 125, 127
VDD
PWMOUT
0V
VDD
OUTPUT
VOLTAGE
0V
BRM = 1
BRM = 0
T
INTCLK/4
BRM
EXTENDED PULSE
==
=
相關(guān)PDF資料
PDF描述
ST92195B2T1/XXX 16-BIT, MROM, 24 MHz, MICROCONTROLLER, PQFP64
ST92195B3B1/XXX 16-BIT, MROM, 24 MHz, MICROCONTROLLER, PDIP56
ST92195B4B1/XXX 16-BIT, MROM, 24 MHz, MICROCONTROLLER, PDIP56
ST92195B5T1/XXX 16-BIT, MROM, 24 MHz, MICROCONTROLLER, PQFP64
ST92195B6T1/XXX 16-BIT, MROM, 24 MHz, MICROCONTROLLER, PQFP64
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ST92195 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:32-64K ROM HCMOS MCU WITH ON-SCREEN-DISPLAY AND TELETEXT DATA SLICER
ST92195B 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:32-64K ROM HCMOS MCU WITH ON-SCREEN-DISPLAY AND TELETEXT DATA SLICER
ST92195B1 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:32-64K ROM HCMOS MCU WITH ON-SCREEN-DISPLAY AND TELETEXT DATA SLICER
ST92195B1B1 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:32-64K ROM HCMOS MCU WITH ON-SCREEN-DISPLAY AND TELETEXT DATA SLICER
ST92195B1T1 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:32-64K ROM HCMOS MCU WITH ON-SCREEN-DISPLAY AND TELETEXT DATA SLICER