PWM Unit 0 (PWMU0) The PWM unit 0 allows to generate precise pulse width mo" />
參數資料
型號: AT89EB5114-TGSIL
廠商: Atmel
文件頁數: 35/86頁
文件大小: 0K
描述: IC 8051 MCU FLASH 4K 20SOIC
產品培訓模塊: MCU Product Line Introduction
標準包裝: 38
系列: 89EB
核心處理器: 8051
芯體尺寸: 8-位
速度: 40MHz
外圍設備: POR,PWM,WDT
輸入/輸出數: 11
程序存儲器容量: 4KB(4K x 8)
程序存儲器類型: 閃存
EEPROM 大?。?/td> 256 x 8
RAM 容量: 256 x 8
電壓 - 電源 (Vcc/Vdd): 3 V ~ 3.6 V
數據轉換器: A/D 6x10b
振蕩器型: 內部
工作溫度: -40°C ~ 85°C
封裝/外殼: 20-SOIC(0.295",7.50mm 寬)
包裝: 管件
產品目錄頁面: 616 (CN2011-ZH PDF)
40
AT89/83EB5114
4311C–8051–02/08
PWM Unit 0 (PWMU0) The PWM unit 0 allows to generate precise pulse width modulation with variable duty
cycle and frequency.
The PWMU0 consists on a dedicated 16 bits auto reload counter/timer which serves as
a time base for the generation of 3 independent PWM signals.
Its clock input can be programmed to count any one of the following signals:
Peripheral clock, CkIdle
Timer 0 overflow
External input on W0CI (P4.0)
The PWMU0 timer/counter shares several external I/O. These pins are listed below. If a
port is not used for the PWMU0, it can still be used for standard I/O.
PWMU0 Timer
The PWMU0 timer is a common 16 bits time base for all three modules (See Figure 16).
The timer count source is determined from the W0CPS1 and W0CPS0 bits in the
W0MOD register (See Table 26) and can be programmed to run at:
Peripheral clock, CkIdle
Timer 0 overflow
External input on W0CI (P1.2)
The output frequency depends on the timer source and also on the W0F Registers.
Indeed, the timer/counter counts from zero up to a value loaded via SW0F registers.
Each time the counter is higher or equal to the SW0F shadow registers value, W0C reg-
isters are automatically reloaded with zero. If the W0UP bit is set, the shadow SW0F
registers are reloaded with the contents of W0F registers when the W0C overtakes. This
prevents frequency drift (See Figure 16.).
Note:
If the PWMU0 is Off (W0R bit in W0CON not set), the contents of W0FH and W0FL are
automatically copied on the shadow registers SW0FH and SW0FL. This allows to charge
the correct comparison values in order to have the wanted frequency as soon as the
PWM is turned on.
PWMU0 Component
External I/O Pin
16-bit Counter
W0CI (P4.0)
16-bit Module 0
W0M0 (P3.0)
16-bit Module 1
W0M1 (P3.1)
16-bit Module 2
W0M2 (P3.3)
相關PDF資料
PDF描述
AT89LP214-20PU MCU 8051 2K FLASH 20MHZ 14-PDIP
AT89LP216-20SU MCU 8051 2K FLASH 20MHZ 16-SOIC
AT89LP4052-20SU IC 8051 MCU FLASH 4K 20SOIC
AT89LP428-20AU MCU 8051 4K FLASH SPI 32TQFP
AT89LP52-20MU IC MCU 8051 8K FLASH SPI 44VQFN
相關代理商/技術參數
參數描述
AT89EB5114-TGSUL 功能描述:8位微控制器 -MCU A/D 4K Flash 256EE RC 4PWM SO20 RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
AT89EMK-01 功能描述:EMULATOR FOR MP3 SND1 MCU RoHS:否 類別:編程器,開發(fā)系統(tǒng) >> 內電路編程器、仿真器以及調試器 系列:Keil 產品變化通告:Development Systems Discontinuation 19/Jul/2010 標準包裝:1 系列:* 類型:* 適用于相關產品:* 所含物品:*
AT89EVK-01 功能描述:開發(fā)板和工具包 - 8051 AT83C24 Kit for TDA8004/8024 rplcmnt RoHS:否 制造商:Silicon Labs 產品:Development Kits 工具用于評估:C8051F960, Si7005 核心: 接口類型:USB 工作電源電壓:
AT89ISP 功能描述:電纜組件 ISP CABLE FOR 89S SERIES - ISP CABLE RoHS:否 制造商:Molex 產品:Power Assemblies 類型:Cable Assembly 連接器端口 A:No Connector 連接器端口 A 管腳計數:4 連接器端口 B:No Connector 連接器端口 B 管腳計數: 型式:Male 線規(guī) - 美國線規(guī)(AWG):20, 28 長度:0.305 m 顏色:Black, Red
AT89LP2052-16PI 功能描述:8位微控制器 -MCU Microcontroller RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT