参数资料
型号: X9251US24Z
厂商: Intersil
文件页数: 19/20页
文件大小: 0K
描述: IC XDCP QUAD 256TAP 50K 24-SOIC
产品培训模块: Solutions for Industrial Control Applications
标准包装: 30
系列: XDCP™
接片: 256
电阻(欧姆): 50k
电路数: 4
温度系数: 标准值 ±300 ppm/°C
存储器类型: 非易失
接口: 6 线 SPI(芯片选择,设备位址)
电源电压: 4.5 V ~ 5.5 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 24-SOIC(0.295",7.50mm 宽)
供应商设备封装: 24-SOIC
包装: 管件
8
FN8166.5
April 13, 2007
Increment/Decrement Command
The final command is Increment/Decrement (See Figures 6
and 7). The Increment/Decrement command is different from
the other commands. Once the command is issued and the
X9251 has responded with an Acknowledge, the master can
clock the selected wiper up and/or down in one segment
steps; thereby, providing a fine tuning capability to the host.
For each SCK clock pulse (tHIGH) while SI is HIGH, the
selected wiper moves one wiper position towards the RH
terminal. Similarly, for each SCK clock pulse while SI is
LOW, the selected wiper moves one wiper position towards
the RL terminal. A detailed illustration of the sequence and
timing for this operation are shown. See Instruction format
for more details.
ID3 ID2 ID1 ID0
0
A1
A0
I3
I2
I1
RB RA
P0
SCK
SI
CS
0101
DEVICE ID
INTERNAL
INSTRUCTION
OPCODE
ADDRESS
REGISTER
0
I0
P1
ADDRESS
DCP/WCR
ADDRESS
0
FIGURE 2. TWO-BYTE INSTRUCTION SEQUENCE
01
0
1
A1 A0
I3 I2
I1
I0
RB RA
P0
SCK
SI
D7 D6 D5 D4
D3 D2
D1 D0
CS
00
ID3 ID2 ID1 ID0
DEVICE ID
INTERNAL
INSTRUCTION
OPCODE
ADDRESS
REGISTER
ADDRESS
DCP/WCR
ADDRESS
00
P1
DATA FOR WCR[7:0] OR DR[7:0]
FIGURE 3. THREE-BYTE INSTRUCTION SEQUENCE SPI INTERFACE; WRITE CASE
01
0
1
A1 A0
I3
I2
I1
I0
RB RA
P0
SCK
SI
D7 D6 D5 D4
D3 D2
D1 D0
CS
00
ID3 ID2 ID1 ID0
DEVICE ID
INTERNAL
INSTRUCTION
OPCODE
ADDRESS
REGISTER
ADDRESS
DCP/WCR
ADDRESS
00
P1
WCR[7:0]
S0
X
XX
X
DON’T CARE
OR
DATA REGISTER BIT [7:0]
FIGURE 4. THREE-BYTE INSTRUCTION SEQUENCE SPI INTERFACE, READ CASE
X9251
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