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參數(shù)資料
| 型號： | ISL22449 |
| 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） |
| 文件頁數(shù)： | 11/12頁 |
| 文件大小： | 356K |
| 代理商： | ISL22449 |
11
FN6333.2
September 15, 2006
FIGURE 13. THREE BYTE READ SEQUENCE
Applications Information
Communicating with ISL22449
Communication with ISL22449 proceeds using SPI interface
through the ACR (address 1000b), IVRi (addresses 0000b,
0001b, 0010b and 0011b) and WRi (addresses 0000b,
0001b, 0010b and 0011b) registers.
The wiper of the potentiometer is controlled by the WRi
register. Writes and reads can be made directly to these
registers to control and monitor the wiper position without
any non-volatile memory changes. This is done by setting
MSB bit at address 1000b to 1.
The non-volatile IVRi stores the power up value of the wiper.
IVRs are accessible when MSB bit at address 1000b is set
to 0. Writing a new value to the IVRi register will set a new
power up position for the wiper. Also, writing to this register
will load the same value into the corresponding WRi as the
IVRi. Reading from the IVRi will not change the WRi, if its
contents are different.
Examples:
A. Writing to the IVR:
This sequence will write a new value (77h) to the IVR2(non-volatile):
Set the ACR (Addr 1000b) for NV write (40h)
Send the ID byte, Instruction Byte, then the Data byte
0 1 0 1 0 0 0 0 1 1 0 0 1 0
0
1
0
1
0
0
I3
I2
I1
I0
R3
R2
R1 R0
SCK
SDI
CS
0
0
SDO
0
D6
D5 D4
D3
D2
D1 D0
DON’T CARE
0
0
0
0
1
0
0
0
0
0
0
(Sent to SDI)
Set the IVR (Addr 0010b) to 77h
Send the ID byte, Instruction Byte, then the Data byte
0 1 0 1 0 0 0 0 1 1 0 0 0 0
1
0
0
1
1
1
0
1
1
1
(Sent to SDI)
B. Reading from the WR:
This sequence will read the value from the WR3 (volatile):
Write to ACR first to access the volatile WRs
Send the ID byte, Instruction Byte, then the Data byte
0 1 0 1 0 0 0 0 1 1 0 0 1 0
0
0
1
1
0
0
0
0
0
0
(Sent to SDI)
Read the data from WR3 (Addr 0011b)
Send the ID byte, Instruction Byte, then Read the Data byte
0 1 0 1 0 0 0 0 1 0 1 1 0 0
1
1
x
x
x
x
x
x
x
x
(Out on SDO)
ISL22449
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| ISL22449WFV14Z | 功能描述:IC POT DGTL 128TP LN LP 14-TSSOP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)字電位器 系列:XDCP™ 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 接片:32 電阻（歐姆）:50k 電路數(shù):1 溫度系數(shù):標(biāo)準(zhǔn)值 50 ppm/°C 存儲器類型:易失 接口:3 線串行（芯片選擇，遞增，增/減） 電源電壓:2.7 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 細(xì)型，TSOT-23-6 供應(yīng)商設(shè)備封裝:TSOT-23-6 包裝:帶卷 (TR) |
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