參數(shù)資料
型號： SST89V54RD2-33-I-TQJ
廠商： SILICON STORAGE TECHNOLOGY INC
元件分類： 微控制器/微處理器
英文描述： FlashFlex51 MCU
中文描述： 8-BIT, FLASH, 33 MHz, MICROCONTROLLER, PQFP44
封裝： MS-026ACB, TQFP-44
文件頁數(shù)： 58/91頁
文件大?。?/td> 984K
代理商： SST89V54RD2-33-I-TQJ
58
Preliminary Specifications
FlashFlex51 MCU
SST89E52RD2 / SST89E54RD2 / SST89E58RD2 / SST89E516RD2
SST89V52RD2 / SST89V54RD2 / SST89V58RD2 / SST89V516RD2
2004 Silicon Storage Technology, Inc.
S71255-00-000
3/04
8.3.4 Pulse Width Modulator
The Pulse Width Modulator (PWM) mode is used to gener-
ate 8-bit PWMs by comparing the low byte of the PCA
timer (CL) with the low byte of the compare register
(CCAPnL). When CL < CCAPnL the output is low. When
CL
≥
CCAPnL the output is high. To activate this mode, the
user must set the PWM and ECOM bits in the module’s
CCAPMn SFR. (See Figure 8-5 and Table 8-7)
In PWM mode, the frequency of the output depends on the
source for the PCA timer. Since there is only one set of CH
and CL registers, all modules share the PCA timer and fre-
quency. Duty cycle of the output is controlled by the value
loaded into the high byte (CCAPnH). Since writes to the
CCAPnH register are asynchronous, a new value written to
the high byte will not be shifted into CCAPnL for compari-
son until the next period of the output (when CL rolls over
from 255 to 00).
To calculate values for CCAPnH for any duty cycle, use
the following equation:
CCAPnH = 256(1 - Duty Cycle)
where CCAPnH is an 8-bit integer and Duty Cycle is a
fraction.
FIGURE
8-5: PCA P
ULSE
W
IDTH
M
ODULATOR
M
ODE
TABLE
8-7: P
ULSE
W
IDTH
M
ODULATOR
F
REQUENCIES
PCA Timer Mode
1/12 Oscillator Frequency
1/4 Oscillator Frequency
Timer 0 Overflow:
8-bit
16-bit
8-bit Auto-Reload
External Input (Max)
PWM Frequency
12 MHz
3.9 KHz
11.8 KHz
16 MHz
5.2 KHz
15.6 KHz
15.5 Hz
0.06 Hz
20.3 Hz
0.08 Hz
3.9 KHz to 15.3 Hz
5.9 KHz
5.2 KHz to 20.3 Hz
7.8 KHz
T8-7.0 1255
1255 F27.0
ECOMn CAPPn CAPNn
MATn
TOGn
PWMn ECCFn
CCAPMn
n=0 to 4
CL
CCAPnL
CCAPnH
PCA Timer/Counter
0
0
0
0
0
8-bit Comparator
Overflow
CL < CCAPnL
CL >= CCAPnL
Enable
CEXn
0
1
相關(guān)PDF資料
PDF描述
SST89V54RD2-40-C-NI FlashFlex51 MCU
SST89V54RD2-40-C-NJ FlashFlex51 MCU
SST89V54RD2-40-C-PI FlashFlex51 MCU
SST89V54RD2-40-C-PJ FlashFlex51 MCU
SST89V54RD2-40-C-TQI FlashFlex51 MCU
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SST89V54RD2-33-I-TQJE 制造商:SST 制造商全稱:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU
SST89V54RD2-33-I-TQJE1 制造商:SST 制造商全稱:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU
SST89V54RD2-33-I-TQJF2 制造商:SST 制造商全稱:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU
SST89V54RD2-40-C-NI 制造商:SST 制造商全稱:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU
SST89V54RD2-40-C-NIE1 制造商:SST 制造商全稱:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*