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參數(shù)資料
| 型號： | AT80C51RD2 |
| 廠商： | Atmel Corp. |
| 英文描述： | ER 6C 3#16 3#8 SKT RECP BOX |
| 中文描述： | 80C51的高性能ROM的8位微控制器 |
| 文件頁數(shù)： | 22/81頁 |
| 文件大?。?/td> | 1082K |
| 代理商： | AT80C51RD2 |
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23
AT80C51RD2/AT83C51Rx2
4113A–8051–09/02
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:
Timer 0 overflow
External input on ECI (P1.2)
Peripheral clock frequency (F
CLK PERIPH
)
÷
6
Peripheral clock frequency (F
CLK PERIPH
)
÷
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 34).
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 8). The timer
count source is determined from the CPS1 and CPS0 bits in the CMOD register
(Table 11) and can be programmed to run at:
1/6 the
peripheral clock frequency (F
CLK PERIPH
)
1/2 the
peripheral clock frequency (F
CLK 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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| AT83C51RB2 | 80C51 High Performance ROM 8-bit Microcontroller |
| AT83C51RC2 | 80C51 High Performance ROM 8-bit Microcontroller |
| AT80C51RD2-3CSCM | Microcontroller |
| AT80C51RD2-3CSIM | Microcontroller |
| AT80C51RD2-RLTIL | Microcontroller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AT80C51RD2_05 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:80C51 High Performance ROM 8-bit Microcontroller |
| AT80C51RD2_08 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:80C51 High Performance ROM 8-bit Microcontroller |
| AT80C51RD2_09 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:80C51 High Performance ROM 8-bit Microcontroller |
| AT80C51RD2-3CSCM | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:80C51 High Performance ROM 8-bit Microcontroller |
| AT80C51RD2-3CSIM | 功能描述:IC MCU 8051 5V SPI 20MHZ 40-DIP RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:80C 標(biāo)準(zhǔn)包裝:9 系列:87C 核心處理器:8051 芯體尺寸:8-位 速度:40/20MHz 連通性:UART/USART 外圍設(shè)備:POR，WDT 輸入/輸出數(shù):32 程序存儲器容量:32KB（32K x 8） 程序存儲器類型:OTP EEPROM 大小:- RAM 容量:256 x 8 電壓 - 電源 (Vcc/Vdd):4.5 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:- 振蕩器型:內(nèi)部 工作溫度:0°C ~ 70°C 封裝/外殼:40-DIP（0.600"，15.24mm） 包裝:管件 |
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