參數資料
型號: AT89S8253-24JU
廠商: Atmel
文件頁數: 27/60頁
文件大?。?/td> 0K
描述: IC MCU 12K FLASH 24MHZ 44-PLCC
產品培訓模塊: MCU Product Line Introduction
標準包裝: 27
系列: 89S
核心處理器: 8051
芯體尺寸: 8-位
速度: 24MHz
連通性: SPI,UART/USART
外圍設備: POR,WDT
輸入/輸出數: 32
程序存儲器容量: 12KB(12K x 8)
程序存儲器類型: 閃存
EEPROM 大小: 2K x 8
RAM 容量: 256 x 8
電壓 - 電源 (Vcc/Vdd): 2.7 V ~ 5.5 V
振蕩器型: 內部
工作溫度: -40°C ~ 85°C
封裝/外殼: 44-LCC(J 形引線)
包裝: 管件
產品目錄頁面: 616 (CN2011-ZH PDF)
33
3286P–MICRO–3/10
AT89S8253
16. Oscillator Characteristics
XTAL1 and XTAL2 are the input and output, respectively, of an inverting amplifier that can be
configured for use as an on-chip oscillator, as shown in Figure 16-1 (A) and (B). Either a quartz
crystal or ceramic resonator may be used. For frequencies above 16MHz it is recommended that
C1 be replaced with R1 for improved startup performance. Note that the internal structure of the
devices adds about 10 pF of capacitance to both XTAL1 and XTAL2. The total capacitance on
XTAL1 or XTAL2, including the external load capacitor (C1/C2) plus internal device load, board
trace and crystal loadings, should not exceed 20 pF. Figure 16-2, 16-3, 16-4 and 16-5 illustrate
the relationship between clock loading and the respective resulting clock amplitudes.
Figure 16-1. Oscillator Connections
Note:
C1, C2 = 0–10 pF for Crystals
= 0–10 pF for Ceramic Resonators
R1
= 4–5 M
Ω
Figure 16-2. Quartz Crystal Clock Source (A)
~10 pF
C2
C1
~10 pF
C2
R1
(A) Low Frequency
(B) High Frequency
Quartz Crystal Clock Input
0
1
2
3
4
5
6
048
12
16
20
24
Frequency (MHz)
X
T
AL
1
Am
p
li
tu
d
e
(V
)
C1=C2=0pF
C1=C2=5pF
C1=C2=10pF
相關PDF資料
PDF描述
VE-J0F-IX-B1 CONVERTER MOD DC/DC 72V 75W
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AT89S8253-24AU IC MCU 12K FLASH 24MHZ 44-TQFP
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AT89S8253-24PI 功能描述:8位微控制器 -MCU UNSAWN WAFER 20 MIL BACKGRIND - 24MHZ RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT