參數(shù)資料
型號(hào): AT89LP214-20PU
廠商: Atmel
文件頁數(shù): 27/98頁
文件大?。?/td> 0K
描述: MCU 8051 2K FLASH 20MHZ 14-PDIP
產(chǎn)品培訓(xùn)模塊: MCU Product Line Introduction
標(biāo)準(zhǔn)包裝: 25
系列: 89LP
核心處理器: 8051
芯體尺寸: 8-位
速度: 20MHz
連通性: SPI,UART/USART
外圍設(shè)備: 欠壓檢測/復(fù)位,POR,PWM,WDT
輸入/輸出數(shù): 12
程序存儲(chǔ)器容量: 2KB(2K x 8)
程序存儲(chǔ)器類型: 閃存
RAM 容量: 128 x 8
電壓 - 電源 (Vcc/Vdd): 2.4 V ~ 5.5 V
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 14-DIP(0.300",7.62mm)
包裝: 管件
33
3538E–MICRO–11/10
AT89LP213/214
.
14.5
Pulse Width Modulation
On the AT89LP213, Timer 0 and Timer 1 may be independently configured as 8-bit asymmetri-
cal (edge-aligned) pulse width modulators (PWM) by setting the PWM0EN or PWM1EN bits in
TCONB, respectively. In PWM Mode the generated waveform is output on the timer's input pin,
T0 or T1. Therefore, C/T must be set to “0” when in PWM mode. and the T0 (P3.4) and T1 (P3.5)
must be configured in an output mode. The Timer Overflow Flags and Interrupts will continue to
function while in PWM Mode and Timer 1 may still generate the baud rate for the UART. Each
PWM channel has four modes selected by the mode bits in TMOD.
An example waveform for Timer 0 in PWM Mode 0 is shown in Figure 14-5. TH0 acts as an 8-bit
counter while RH0 stores the 8-bit compare value. When TH0 is 00H the PWM output is
set high. When the TH0 count reaches the value stored in RH0 the PWM output is set low.
Therefore, the pulse width is proportional to the value in RH0. To prevent glitches, writes to
RH0 only take effect on the FFH to 00H overflow of TH0. Setting RH0 to 00H will keep the PWM
output low.
Figure 14-5. Asymmetrical Pulse Width Modulation
Table 14-3.
TCONB
– Timer/Counter Control Register B
TCONB = 91H
Reset Value = 0010 0100B
Not Bit Addressable
PWM1EN
PWM0EN
PSC12
PSC11
PSC10
PSC02
PSC01
PSC00
Bit
7
6
543
21
0
Symbol
Function
PWM1EN
Configures Timer 1 for Pulse Width Modulation output on T1 (P3.5).
PWM0EN
Configures Timer 0 for Pulse Width Modulation output on T0 (P3.4).
PSC12
PSC11
PSC10
Prescaler for Timer 1 Mode 0. The number of active bits in TL1 equals PSC1 + 1. After reset PSC1 = 100B which
enables 5 bits of TL1 for compatibility with the 13-bit Mode 0 in AT89S2051.
PSC02
PSC01
PSC00
Prescaler for Timer 0 Mode 0. The number of active bits in TL0 equals PSC0 + 1. After reset PSC0 = 100B which
enables 5 bits of TL0 for compatibility with the 13-bit Mode 0 in AT89C52.
Tx
THx
FFh
相關(guān)PDF資料
PDF描述
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
AT89LP6440-20JU MCU 8051 64K FLASH ISP 44PLCC
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AT89LP214-20SU 功能描述:8位微控制器 -MCU SINGLE CYCLE 2K ISP FLASH 2.4-5.5V RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) 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(fēng)格:SMD/SMT
AT89LP214-20XU 功能描述:8位微控制器 -MCU SINGLE CYCLE 2K ISP FLASH 2.4-5.5V RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) 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(fēng)格:SMD/SMT
AT89LP216-16XI 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(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) 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(fēng)格:SMD/SMT
AT89LP216-20PU 功能描述:8位微控制器 -MCU SINGLE CYCLE 2K ISP FLASH 2.4-5.5V RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) 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(fēng)格:SMD/SMT
AT89LP216-20SU 功能描述:8位微控制器 -MCU SINGLE CYCLE 2K ISP FLASH 2.4-5.5V RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) 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(fēng)格:SMD/SMT