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參數(shù)資料
| 型號： | AD5170EVAL |
| 廠商： | Analog Devices, Inc. |
| 元件分類： | 數(shù)字電位計(jì) |
| 英文描述： | 256-Position Two-Time Programmable I2C Digital Potentiometer |
| 中文描述： | 256位二時(shí)間的I2C可編程數(shù)字電位器 |
| 文件頁數(shù)： | 18/24頁 |
| 文件大?。?/td> | 900K |
| 代理商： | AD5170EVAL |
AD5170
I
2
C INTERFACE
Table 7. Write Mode
S
0
1
Rev. A | Page 18 of 24
0
1
1 AD1 AD0 W
A
2T SD
T
Instruction Byte
0 OW
X
X
X
A D7 D6 D5 D4 D3 D2 D1 D0
Data Byte
A
P
Slave Address Byte
Table 8. Read Mode
S
0
1
0
1
1 AD1 AD0 R
A D7 D6 D5 D4 D3 D2 D1 D0
Instruction Byte
A
E1
E0
X
X
X
X
X
X
A
P
Slave Address Byte
Data Byte
S = Start Condition.
P = Stop Condition.
A = Acknowledge.
AD0, AD1 = Package Pin Programmable Address Bits.
X = Don’t Care.
W = Write.
R = Read.
2T = Second fuse link array for two-time programming. Logic 0
corresponds to first trim. Logic 1 corresponds to second trim.
Note that blowing trim #2 before trim #1 effectively disables
trim #1 and in turn only allows one-time programming.
SD = Shutdown connects wiper to B terminal and open circuits
the A terminal. It does not change the contents of the wiper
register.
T = OTP Programming Bit. Logic 1 permanently programs the
wiper.
OW = Overwrite the fuse setting and program the digital
potentiometer to a different setting. Note that upon power-up,
the digital potentiometer presets to either midscale or fuse
setting depending on whether the fuse link has been blown.
D7, D6, D5, D4, D3, D2, D1, D0 = Data Bits.
E1, E0 = OTP Validation Bits.
0, 0 = Ready to Program.
1, 0 = Fatal Error. Some fuses not blown. Do not retry.
Discard this unit.
1, 1 = Programmed Successfully. No further adjustments are
possible.
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