參數(shù)資料
型號(hào): ISL22419
廠商: Intersil Corporation
英文描述: Low Noise, Low Power, SPI Bus, 128 Taps, Wiper Only(低噪聲,低功率,SPI總線, 128抽頭電位器)
中文描述: 低噪聲,低功耗,SPI總線,128抽頭,雨刷,只有(低噪聲,低功率和SPI總線,128抽頭電位器)
文件頁(yè)數(shù): 11/13頁(yè)
文件大小: 365K
代理商: ISL22419
11
FN6311.0
June 28, 2006
FIGURE 12. THREE BYTE WRITE SEQUENCE
FIGURE 13. THREE BYTE READ SEQUENCE
Applications Information
Communicating with ISL22419
Communication with ISL22419 proceeds using SPI interface
through the ACR (address 11b), IVR (address 00b) and WR
(address 00b) registers.
The wiper of the potentiometer is controlled by the WR
register. Writes and reads can be made directly to this
register to control and monitor the wiper position without any
non-volatile memory changes. This is done by setting MSB
bit (ACR[7]) at address 11b to 1.
The non-volatile IVR stores the power up value of the wiper.
IVR is accessible when MSB bit (ACR[7]) at address 11b is
set to 0. Writing a new value to the IVR register will set a
new power up position for the wiper. Also, writing to this
register will load the same value into the WR as the IVR.
Reading from the IVR will not change the WR, if its contents
are different.
The typical application diagram is shown in Figure 14. For
proper operation adding 0.1μF decoupling ceramic capacitor
to V
CC
is recommended
.
The capacitor value may vary
based on expected noise frequency of the design.
0
1
0
1
0
0
I3
I2
I1
I0
0
0
R1 R0
SCK
SDI
0
D6 D5 D4 D3 D2
D1 D0
CS
0
0
0
0
1
0
1
0
0
I3
I2
I1
I0
0
0
R1 R0
SCK
SDI
CS
0
0
SDO
0
D6 D5 D4 D3 D2
D1 D0
Don’t Care
0
ISL22419
相關(guān)PDF資料
PDF描述
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ISL22446 Low Noise, Low Power, SPI Bus, 128 Taps(低噪聲,低功率,SPI總線, 128抽頭電位器)
ISL22449 Low Noise, Low Power, SPI Bus, 128 Taps, Wiper Only(低噪聲,低功率,SPI總線, 128抽頭電位器)
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