- 您现在的位置：买卖IC网 > PDF目录381492 > AT80C51RB2-RLTIL (Atmel Corp.) 80C51 High Performance ROM 8-bit Microcontroller PDF资料下载
参数资料
| 型号： | AT80C51RB2-RLTIL |
| 厂商： | Atmel Corp. |
| 英文描述： | 80C51 High Performance ROM 8-bit Microcontroller |
| 中文描述： | 80C51的高性能ROM的8位微控制器 |
| 文件页数： | 22/83页 |
| 文件大小： | 672K |
| 代理商： | AT80C51RB2-RLTIL |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页当前第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页
23
AT80C51RD2/AT83C51Rx2
4113B–8051–03/05
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:
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
相关PDF资料 |
PDF描述 |
|---|---|
| AT80C51RB2-RLTIM | 80C51 High Performance ROM 8-bit Microcontroller |
| AT80C51RB2-RLTUL | 80C51 High Performance ROM 8-bit Microcontroller |
| AT80C51RB2-RLTUM | 80C51 High Performance ROM 8-bit Microcontroller |
| AT80C51RB2-SLSCM | 80C51 High Performance ROM 8-bit Microcontroller |
| AT80C51RB2-SLSIL | 80C51 High Performance ROM 8-bit Microcontroller |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AT80C51RB2-RLTIM | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:80C51 High Performance ROM 8-bit Microcontroller |
| AT80C51RB2-RLTUL | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:80C51 High Performance ROM 8-bit Microcontroller |
| AT80C51RB2-RLTUM | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:80C51 High Performance ROM 8-bit Microcontroller |
| AT80C51RB2-SLSCM | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:80C51 High Performance ROM 8-bit Microcontroller |
| AT80C51RB2-SLSIL | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:80C51 High Performance ROM 8-bit Microcontroller |
发布紧急采购，3分钟左右您将得到回复。