參數(shù)資料
型號: ISL22446WFV20Z-TK
廠商: Intersil
文件頁數(shù): 5/15頁
文件大小: 0K
描述: IC POT DGTL 128TP LN LP 20-TSSOP
產(chǎn)品培訓模塊: Solutions for Industrial Control Applications
標準包裝: 1,000
系列: XDCP™
接片: 128
電阻(歐姆): 10k
電路數(shù): 4
溫度系數(shù): 標準值 ±50 ppm/°C
存儲器類型: 非易失
接口: 4 線 SPI(芯片選擇)
電源電壓: 2.7 V ~ 5.5 V
工作溫度: -40°C ~ 125°C
安裝類型: 表面貼裝
封裝/外殼: 20-TSSOP(0.173",4.40mm 寬)
供應商設備封裝: 20-TSSOP
包裝: 帶卷 (TR)
13
FN6181.2
September 9, 2009
Applications Information
Communicating with ISL22446
Communication with ISL22446 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
Set the IVR0 (Addr 0000b) to 77h
Send the ID byte, Instruction Byte, then the Data byte
B. Reading from the WR
This sequence will read the value from the WR3 (volatile):
Write to ACR first to access the WRs
Send the ID byte, Instruction Byte, then the Data byte
Read the data from WR3 (Addr 0011b)
Send the ID byte, Instruction Byte, then Read the Data byte
01 010 000 110 010 000 100 000 0
(Sent to SDI)
01 010 000 110 000 100 111 011 1
(Sent to SDI)
01 010 000 110 010 001 100 000 0
(Sent to SDI)
0 1 0 1 0 0 0 0 1 0 1 1 0 0 1 1 x xxx xxxx
(Out on SDO)
ISL22446
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