AT89C51ID2-RLTIM【PDF 93/157 页】IC 8051 MCU FLASH 64K 44VQFP

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AT89C51ID2

4289C–8051–11/05

Programmable

Counter Array PCA

The PCA provides more timing capabilities with less CPU intervention than the standard

timer/counters. Its advantages include reduced software overhead and improved accu-

racy. The PCA consists of a dedicated timer/counter which serves as the time base for

an array of five compare/capture modules. Its clock input can be programmed to count

any one of the following signals:

Peripheral clock frequency (F

CLK PERIPH) ÷ 6

Peripheral clock frequency (F

CLK PERIPH) ÷ 2

Timer 0 overflow

External input on ECI (P1.2)

Each compare/capture modules can be programmed in any one of the following modes:

Rising and/or falling edge capture

Software timer

High-speed output

Pulse width modulator

Module 4 can also be programmed as a watchdog timer (See Section "PCA Watchdog

Timer", page 51).

When the compare/capture modules are programmed in the capture mode, software

timer, or high speed output mode, an interrupt can be generated when the module exe-

cutes its function. All five modules plus the PCA timer overflow share one interrupt

vector.

The PCA timer/counter and compare/capture modules share Port 1 for external I/O.

These pins are listed below. If the port is not used for the PCA, it can still be used for

standard I/O.

The PCA timer is a common time base for all five modules (See Figure 14). The timer

count source is determined from the CPS1 and CPS0 bits in the CMOD register

(Table 27) and can be programmed to run at:

1/6 the

peripheral clock frequency (F

CLK PERIPH)

1/2 the

peripheral clock frequency (FCLK PERIPH)

The Timer 0 overflow

The input on the ECI pin (P1.2)

PCA component

External I/O Pin

16-bit Counter

P1.2 / ECI

16-bit Module 0

P1.3 / CEX0

16-bit Module 1

P1.4 / CEX1

16-bit Module 2

P1.5 / CEX2

16-bit Module 3

P1.6 / CEX3

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AT89C51ID2-RLTUM 功能描述:8位微控制器 -MCU C51ID2 64K FLASH 32KHz 3-5.5V RoHS:否制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT

AT89C51ID2-SLRIM 功能描述:IC MCU FLASH 8051 64K 5V 44-PLCC RoHS:否类别:集成电路 (IC) >> 嵌入式 - 微控制器，系列:89C 标准包装:1,500 系列:AVR® ATtiny 核心处理器:AVR 芯体尺寸:8-位速度:16MHz 连通性:I²C，LIN，SPI，UART/USART，USI 外围设备:欠压检测/复位，POR，PWM，温度传感器，WDT 输入/输出数:16 程序存储器容量:8KB（4K x 16）程序存储器类型:闪存 EEPROM 大小:512 x 8 RAM 容量:512 x 8 电压 - 电源 (Vcc/Vdd):2.7 V ~ 5.5 V 数据转换器:A/D 11x10b 振荡器型:内部工作温度:-40°C ~ 125°C 封装/外壳:20-SOIC（0.295"，7.50mm 宽）包装:带卷 (TR)

AT89C51ID2-SLRUM 功能描述:8位微控制器 -MCU C51ID2 64K FLASH TWI 32KHz 5V RoHS:否制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT

AT89C51ID2-SLSIM 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:8-bit Flash Microcontroller

AT89C51ID2-SLSUM 功能描述:8位微控制器 -MCU 64K FLASH 32KHz 3.5-5V Ind. RoHS:否制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT

AT89C51ID2-SMSIM 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:8-bit Flash Microcontroller

AT89C51ID2-UM 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:8-bit Flash Microcontroller

AT89C51RB2 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:8-bit Microcontroller with 16K/ 32K Bytes Flash

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