參數(shù)資料
型號(hào)： AT80C51RD2
廠(chǎng)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(yè)數(shù)： 8/81頁(yè)
文件大?。?/td> 1082K
代理商： AT80C51RD2
9
AT80C51RD2/AT83C51Rx2
4113A–8051–09/02
Oscillators
Overview
One oscillator is available for CPU:
OSC used for high frequency (3 MHz to 40 MHz)
In order to optimize the power consumption and the execution time needed for a specific
task, an internal prescaler feature has been implemented between the selected oscilla-
tor and the CPU.
Registers
Table 4.
Clock Reload Register
Reset Value = 1111 1111b
Not bit addressable
Prescaler Divider
A hardware RESET puts the prescaler divider in the following state:
CKRL = FFh: F
CLK CPU
= F
CLK PERIPH
= F
OSC
/2 (Standard C51 feature)
KS signal selects OSC: F
CLK OUT
= F
OSC
Any value between FFh down to 00h can be written by software into CKRL register
in order to divide frequency of the selected oscillator:
–
CKRL = 00h: minimum frequency
F
CLK CPU
= F
CLK PERIPH
= F
OSC
/1020 (Standard Mode)
F
CLK CPU
= F
CLK PERIPH
= F
OSC
/510 (X2 Mode)
–
CKRL = FFh: maximum frequency
F
CLK CPU
= F
CLK PERIPH
= F
OSC
/2 (Standard Mode)
F
CLK CPU
= F
CLK PERIPH
= F
OSC
(X2 Mode)
–
F
CLK CPU
and F
CLK PERIPH
In X2 mode:
In X1 mode:
7
6
5
4
3
2
1
0
-
-
-
-
-
-
-
-
Bit
Number
Bit
Mnemonic Description
7:0
CKRL
Clock Reload Register: Prescaler value
F
CPU
F
=
CLKPERIPH
F
255
2
CKRL
F
255
–
(
)
×
----------------------------------------------
=
F
CPU
F
=
CLKPERIPH
4
CKRL
–
(
)
×
-----------------------------------------------
=
相關(guān)PDF資料
PDF描述
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(chēng):ATMEL Corporation 功能描述:80C51 High Performance ROM 8-bit Microcontroller
AT80C51RD2_08 制造商:ATMEL 制造商全稱(chēng):ATMEL Corporation 功能描述:80C51 High Performance ROM 8-bit Microcontroller
AT80C51RD2_09 制造商:ATMEL 制造商全稱(chēng):ATMEL Corporation 功能描述:80C51 High Performance ROM 8-bit Microcontroller
AT80C51RD2-3CSCM 制造商:ATMEL 制造商全稱(chēng):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(lèi)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(lèi)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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