14 FN7873.0 June 20, 2011 When the device enters shutdown, all current DCP WR settings are maintained. When the device exits shutdown," />
參數(shù)資料
型號(hào)： ISL23425TFVZ
廠商： Intersil
文件頁(yè)數(shù)： 6/20頁(yè)
文件大?。?/td> 0K
描述： IC DGTL POT 256POS 100K 14TSSOP
標(biāo)準(zhǔn)包裝： 960
系列： XDCP™
接片： 256
電阻（歐姆）： 100k
電路數(shù)： 2
溫度系數(shù)： 標(biāo)準(zhǔn)值 45 ppm/°C
存儲(chǔ)器類型： 易失
接口： 4 線 SPI（芯片選擇）
電源電壓： 1.2 V ~ 5.5 V，1.7 V ~ 5.5 V
工作溫度： -40°C ~ 125°C
安裝類型： *
封裝/外殼： *
供應(yīng)商設(shè)備封裝： *
包裝： *
ISL23425
14
FN7873.0
June 20, 2011
When the device enters shutdown, all current DCP WR settings are
maintained. When the device exits shutdown, the wipers will
return to the previous WR settings after a short settling time
(see Figure 26).
SPI Serial Interface
The ISL23425 supports an SPI serial protocol, mode 0. The
device is accessed via the SDI input and SDO output with data
clocked in on the rising edge of SCK, and clocked out on the
falling edge of SCK. CS must be LOW during communication with
the ISL23425. The SCK and CS lines are controlled by the host or
master. The ISL23425 operates only as a slave device.
All communication over the SPI interface is conducted by
sending the MSB of each byte of data first.
Protocol Conventions
The SPI protocol contains Instruction Byte followed by one or more
Data Bytes. A valid Instruction Byte contains instruction as the three
MSBs, with the following five register address bits (see Table 3).
The next byte sent to the ISL23425 is the Data Byte.
Table 4 contains a valid instruction set for ISL23425.
If the [R4:R0] bits are zero or one, then the read or write is to the
WRi register. If the [R4:R0] are 10000, then the operation is to
the ACR.
FIGURE 26. SHUTDOWN MODE WIPER RESPONSE
POWER-UP
USER PROGRAMMED
MID SCALE = 80H
SHDN ACTIVATED
SHDN RELEASED
AFTER SHDN
W
IPE
R
VO
LT
A
G
E,
V
RW
(V
)
SHDN MODE
TIME (s)
WIPER RESTORE TO
THE ORIGINAL POSITION
0
TABLE 3. INSTRUCTION BYTE FORMAT
BIT #
7
654321
0
I2
I1
I0
R4
R3
R2
R1
R0
TABLE 4. INSTRUCTION SET
INSTRUCTION SET
OPERATION
I2
I1
I0
R4
R3
R2
R1
R0
0
XXX
XX
NOP
0
1
XXX
XX
ACR READ
0
1
XXX
XX
ACR WRTE
1
0
R4R3R2R1R0
WRi or ACR READ
1
0
R4R3R2R1R0
WRi or ACR WRTE
Where X means “do not care”.
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