參數(shù)資料
型號: FT232RQ
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標識安全適配器
文件頁數(shù): 18/29頁
文件大?。?/td> 471K
代理商: FT232RQ
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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