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參數(shù)資料
| 型號： | ADUC832BS |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | MicroConverter, 12-Bit ADCs and DACs with Embedded 62 kBytes Flash MCU |
| 中文描述： | 8-BIT, FLASH, 16.78 MHz, MICROCONTROLLER, PQFP52 |
| 封裝： | PLASTIC, MQFP-52 |
| 文件頁數(shù)： | 36/80頁 |
| 文件大?。?/td> | 1311K |
| 代理商： | ADUC832BS |
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REV. 0
–36–
ADuC832
PULSEWIDTH MODULATOR (PWM)
The PWM on the ADuC832 is a highly flexible PWM offering
programmable resolution and an input clock, and can be config-
ured for any one of six different modes of operation. Two of
these modes allow the PWM to be configured as a - DAC
with up to 16 bits of resolution. A block diagram of the PWM is
shown in Figure 26.
CLOCK
SELECT
PROGRAMMABLE
DIVIDER
COMPARE
MODE
PWM0H/L
PWM1H/L
f
VCO
TO/EXTERNAL PWM CLOCK
f
XTAL
/15
f
XTAL
P2.6
P2.7
16-BIT PWM COUNTER
Figure 26. PWM Block Diagram
The PWM uses five SFRs: the control SFR (PWMCON) and
four data SFRs (PWM0H, PWM0L, PWM1H, and PWM1L).
PWMCON (as described below) controls the different modes of
operation of the PWM as well as the PWM clock frequency.
PWM0H/L and PWM1H/L are the data registers that deter-
mine the duty cycles of the PWM outputs. The output pins that
the PWM uses are determined by the CFG832 register, and can
be either P2.6 and P2.7 or P3.4 and P3.3. In this section of the
data sheet, it is assumed that P2.6 and P2.7 are selected as the
PWM outputs.
To use the PWM user software, first write to PWMCON to
select the PWM mode of operation and the PWM input clock.
Writing to PWMCON also resets the PWM counter. In any of
the 16-bit modes of operation (modes 1, 3, 4, 6), user software
should write to the PWM0L or PWM1L SFRs first. This value
is written to a hidden SFR. Writing to the PWM0H or PWM1H
SFRs updates both the PWMxH and the PWMxL SFRs but
does not change the outputs until the end of the PWM cycle in
progress. The values written to these 16-bit registers are then
used in the next PWM cycle.
PWMCON
SFR Address
Power-On Default Value
Bit Addressable
PWM Control SFR
AEH
00H
No
Table XI. PWMCON SFR Bit Designations
Bit
Name
Description
7
6
5
4
SNGL
MD2
MD1
MD0
Turns off PWM Output at P2.6 or P3.4 Leaving Port Pin Free for Digital I/O.
PWM Mode Bits
The MD2/1/0 bits choose the PWM mode as follows:
MD2
MD1
MD0
Mode
0
0
0
Mode 0: PWM Disabled
0
0
1
Mode 1: Single variable resolution PWM on P2.7 or P3.3
0
1
0
Mode 2: Twin 8-bit PWM
0
1
1
Mode 3: Twin 16-bit PWM
1
0
0
Mode 4: Dual NRZ 16-bit - DAC
1
0
1
Mode 5: Dual 8-bit PWM
1
1
0
Mode 6: Dual RZ 16-bit - DAC
1
1
1
Reserved for future use
PWM Clock Divider
Scale the clock source for the PWM counter as shown below:
CDIV1 CDIV0 Description
0
0
PWM Counter = Selected Clock /1
0
1
PWM Counter = Selected Clock /4
1
0
PWM Counter = Selected Clock /16
1
1
PWM Counter = Selected Clock /64
PWM Clock Divider
Select the clock source for the PWM as shown below:
CSEL1 CSEL0 Description
0
0
PWM Clock = f
XTAL
/15
0
1
PWM Clock = f
XTAL
1
0
PWM Clock = External input at P3.4/T0
1
1
PWM Clock = f
VCO
= 16.777216 MHz
3
2
CDIV1
CDIV0
1
0
CSEL1
CSEL0
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相關代理商/技術參數(shù) |
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| ADUC832BS-REEL | 制造商:Analog Devices 功能描述:MCU 8-Bit ADuC8xx 8052 CISC 62KB Flash 3.3V/5V 52-Pin MQFP T/R |
| ADUC832BSZ | 功能描述:IC ADC/DAC 12BIT W/MCU 52MQFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:MicroConverter® ADuC8xx 標準包裝:250 系列:56F8xxx 核心處理器:56800E 芯體尺寸:16-位 速度:60MHz 連通性:CAN，SCI，SPI 外圍設備:POR，PWM，溫度傳感器，WDT 輸入/輸出數(shù):21 程序存儲器容量:40KB（20K x 16） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:6K x 16 電壓 - 電源 (Vcc/Vdd):2.25 V ~ 3.6 V 數(shù)據轉換器:A/D 6x12b 振蕩器型:內部 工作溫度:-40°C ~ 125°C 封裝/外殼:48-LQFP 包裝:托盤 配用:MC56F8323EVME-ND - BOARD EVALUATION MC56F8323 |
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