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參數(shù)資料
| 型號(hào)： | DS1065T-80 |
| 英文描述： | IC-OSC/DIVIDER |
| 中文描述： | IC-OSC/DIVIDER |
| 文件頁(yè)數(shù)： | 5/10頁(yè) |
| 文件大小： | 207K |
| 代理商： | DS1065T-80 |
DS1065
5 of 10
PROGRAMMING
Normally when power is applied to the supply voltage pin the device will enter its normal operating
mode, following the power-on reset sequence. However the device can be made to enter a programming
mode if a pullup resistor is connected between IN/OUT and the supply voltage pin prior to power-up.
The method used for programming is a variant of the 1-Wire
TM
protocol used on a number of Dallas
Semiconductor products.
HARDWARE
The hardware configuration is shown in the diagram. A bus master is used to read and write data to the
DS1065’s internal registers. The bus master may have either an open-drain or TTL-type architecture.
Figure 11
Programming mode is entered by simply powering up the DS1065 with a pullup of approximately 5k
.
This will pull the IN/OUT pin above V
IH
on power-up and initiate the programming mode, causing the
DS1065 to internally release the IN/OUT pin after t
STAB
and allow the pullup resistor to pull up the pin to
the supply rail and await the Master Tx Reset pulse (see diagram).
NOTE:
To ensure normal operation any external pullup applied to IN/OUT must be greater than 20 k
in value.
This will cause the IN/OUT pin to remain below V
IH
on power-up, resulting in normal operation at the
end of t
STAB
.
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