參數(shù)資料
型號(hào): AT89C51ED2-SMSUM
廠商: Atmel
文件頁數(shù): 46/137頁
文件大?。?/td> 0K
描述: IC 8051 MCU FLASH 64K 68PLCC
產(chǎn)品培訓(xùn)模塊: MCU Product Line Introduction
標(biāo)準(zhǔn)包裝: 304
系列: 89C
核心處理器: 8051
芯體尺寸: 8-位
速度: 60MHz
連通性: SPI,UART/USART
外圍設(shè)備: POR,PWM,WDT
輸入/輸出數(shù): 50
程序存儲(chǔ)器容量: 64KB(64K x 8)
程序存儲(chǔ)器類型: 閃存
EEPROM 大?。?/td> 2K x 8
RAM 容量: 2K x 8
電壓 - 電源 (Vcc/Vdd): 2.7 V ~ 5.5 V
振蕩器型: 外部
工作溫度: -40°C ~ 85°C
封裝/外殼: 68-PLCC
包裝: 管件
配用: AT89OCD-01-ND - USB EMULATOR FOR AT8XC51 MCU
16
4235K–8051–05/08
AT89C51RD2/ED2
6.2
Functional Block Diagram
Figure 6-1.
Functional Oscillator Block Diagram
6.2.1
Prescaler Divider
A hardware RESET puts the prescaler divider in the following state:
CKRL = FFh: FCLK CPU = FCLK PERIPH = FOSC/2 (Standard C51 feature)
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
FCLK CPU = FCLK PERIPH = FOSC/1020 (Standard Mode)
FCLK CPU = FCLK PERIPH = FOSC/510 (X2 Mode)
CKRL = FFh: maximum frequency
FCLK CPU = FCLK PERIPH = FOSC/2 (Standard Mode)
FCLK CPU = FCLK PERIPH = FOSC (X2 Mode)
FCLK CPU and FCLK PERIPH
In X2 Mode, for CKRL<>0xFF:
In X1 Mode, for CKRL<>0xFF then:
Xtal2
Xtal1
Osc
CLK
Idle
CPU Clock
CKRL
Reload
8-bit
Prescaler-Divider
Reset
Peripheral Clock
:2
X2
0
1
F
OSC
CKCON0
CLK
Periph
CPU
CKRL = 0xFF?
0
1
F
CPU
F
=
CLKPERIPH
F
OSC
2
255
CKRL
(
)
×
-----------------------------------------------
=
F
CPU
F
=
CLKPERIPH
F
OSC
4
255
CKRL
(
)
×
-----------------------------------------------
=
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AT89C51IC2-RLRIL 功能描述:IC MCU FLASH 8051 32K 3V 44-VQFP RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器, 系列:89C 標(biāo)準(zhǔn)包裝:1 系列:AVR® ATmega 核心處理器:AVR 芯體尺寸:8-位 速度:16MHz 連通性:I²C,SPI,UART/USART 外圍設(shè)備:欠壓檢測(cè)/復(fù)位,POR,PWM,WDT 輸入/輸出數(shù):32 程序存儲(chǔ)器容量:32KB(16K x 16) 程序存儲(chǔ)器類型:閃存 EEPROM 大小:1K x 8 RAM 容量:2K x 8 電壓 - 電源 (Vcc/Vdd):2.7 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 8x10b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 125°C 封裝/外殼:44-TQFP 包裝:剪切帶 (CT) 其它名稱:ATMEGA324P-B15AZCT