參數(shù)資料
型號(hào)： TS80C51RA2-MCMD
廠商： Atmel Corp.
英文描述： High Performance 8-bit Microcontrollers
中文描述： 高性能8位微控制器
文件頁數(shù)： 23/74頁
文件大?。?/td> 903K
代理商： TS80C51RA2-MCMD
Rev. C - 06 March, 2001
23
TS80C51RA2/RD2
TS83C51RB2/RC2/RD2
TS87C51RB2/RC2/RD2
6.5. 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 accuracy. 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)
Oscillator frequency
÷
12 (
÷
6 in X2 mode)
Oscillator frequency
÷
4 (
÷
2 in X2 mode)
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, or
pulse width modulator.
Module 4 can also be programmed as a watchdog timer (See Section "PCA Watchdog Timer", page 33).
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 executes 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 7)
. The timer count source is
determined from the CPS1 and CPS0 bits in the
CMOD SFR
(See Table 8) and can be programmed to run
at:
1/12 the oscillator frequency. (Or 1/6 in X2 Mode)
1/4 the oscillator frequency. (Or 1/2 in X2 Mode)
The Timer 0 overflow
The input on the ECI pin (P1.2)
PCA component
16-bit Counter
16-bit Module 0
16-bit Module 1
16-bit Module 2
16-bit Module 3
16-bit Module 4
External I/O Pin
P1.2 / ECI
P1.3 / CEX0
P1.4 / CEX1
P1.5 / CEX2
P1.6 / CEX3
P1.7 / CEX4
相關(guān)PDF資料
PDF描述
TS80C51RA2-VCKB High Performance 8-bit Microcontrollers
TS80C51RA2-VCKD High Performance 8-bit Microcontrollers
TS80C51RA2-VCKR High Performance 8-bit Microcontrollers
TS87C51RD2 High Performance 8-bit Microcontrollers
TS83C51RD2 High Performance 8-bit Microcontrollers
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TS80C51RA2-MCMR 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:High Performance 8-bit Microcontrollers
TS80C51RA2-MCNB 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:High Performance 8-bit Microcontrollers
TS80C51RA2-MCND 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:High Performance 8-bit Microcontrollers
TS80C51RA2-MCNR 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:High Performance 8-bit Microcontrollers
TS80C51RA2-MIA 功能描述:IC MCU 8BIT 256BYTE 40MHZ 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(chǔ)器容量:32KB（32K x 8） 程序存儲(chǔ)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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