參數(shù)資料
型號： FT232R
廠商： Electronic Theatre Controls, Inc.
英文描述： Incorporating Clock Generator Output and FTDIChip-ID Security Dongle
中文描述： 納入時鐘發(fā)生器輸出和FTDIChip標(biāo)識安全適配器
文件頁數(shù)： 18/29頁
文件大?。?/td> 471K
代理商： FT232R
FT232R USB UART I.C. Datasheet Version 1.04
Future Technology Devices International Ltd. 2005
Page 18
6.3 EEPROM Reliability Characteristics
The internal 1024 Bit EEPROM has the following reliability characteristics-
Table 15 - EEPROM Characteristics
Parameter Description
Value
Unit
Data Retention
15
Years
Read / Write Cycles
100,000
Cycles
6.4 Internal Clock Characteristics
The internal Clock Oscillator has the following characteristics.
Table 16 - Internal Clock Characteristics
Parameter
Value
Typical
Unit
Min
Max
Frequency of Operation
11.98
12.00
12.02
MHz****
Clock Period
83.19
83.33
83.47
ns
Duty Cycle
45
50
55
%
****Equivalent to +/-1667ppm.
Table 17 - OSCI, OSCO Pin Characteristics (Optional - Only applies if external Oscillator is used*****)
Parameter
Description
Min
Typ
Max
Units
Conditions
Voh
Output Voltage High
2.8
-
3.6
V
Fosc = 12MHz
Vol
Output Voltage Low
0.1
-
1.0
V
Fosc = 12MHz
Vin
Input Switching Threshold
1.8
2.5
3.2
V
*****When supplied the device is configured to use its internal clock oscillator. Users who wish to use an external
oscillator or crystal should contact
FTDI technical support
.
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