15 FN7780.1 August 16, 2011 Write Operation A write operation to the ISL23415 is a two or more bytes operation. It requires first, the" />
參數(shù)資料
型號: ISL23415TFUZ
廠商: Intersil
文件頁數(shù): 7/20頁
文件大?。?/td> 0K
描述: IC DGTL POT 256POS 100K 10MSOP
產(chǎn)品培訓(xùn)模塊: Solutions for Industrial Control Applications
標(biāo)準(zhǔn)包裝: 50
系列: XDCP™
接片: 256
電阻(歐姆): 100k
電路數(shù): 1
溫度系數(shù): 標(biāo)準(zhǔn)值 70 ppm/°C
存儲器類型: 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: 表面貼裝
封裝/外殼: 10-TFSOP,10-MSOP(0.118",3.00mm 寬)
供應(yīng)商設(shè)備封裝: 10-MSOP
包裝: 管件
ISL23415
15
FN7780.1
August 16, 2011
Write Operation
A write operation to the ISL23415 is a two or more bytes
operation. It requires first, the CS transition from HIGH-to-LOW.
Then the host sends a valid Instruction Byte, followed by one or
more Data Bytes to the SDI pin. The host terminates the write
operation by pulling the CS pin from LOW-to-HIGH. Instruction is
executed on the rising edge of CS (see Figure 27).
Read Operation
A Read operation to the ISL23415 is a four byte operation. It
requires first, the CS transition from HIGH-to-LOW. Then the host
sends a valid Instruction Byte, followed by a “dummy” Data Byte,
NOP Instruction Byte and another “dummy” Data Byte to SDI pin.
The SPI host receives the Instruction Byte (instruction code +
register address) and requested Data Byte from SDO pin on the
rising edge of SCK during third and fourth bytes, respectively. The
host terminates the read by pulling the CS pin from LOW-to-HIGH
(see Figure 28).
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”.
FIGURE 27. TWO BYTE WRITE SEQUENCE
CS
SCK
SDI
SDO
WR INSTRUCTION
DATA BYTE
1
3
4
5
7
8
9
1011
1213141516
26
ADDR
FIGURE 28. FOUR BYTE READ SEQUENCE
CS
SCK
SDI
SDO
RD
ADDR
NOP
RD
ADDR
READ DATA
1
8
16
24
32
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