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| 型号： | MCP4531T-503E/ML |
| 元件分类： | 数字电位计 |
| 英文描述： | DIGITAL POTENTIOMETER, PQCC16 |
| 封装： | 4 X 4 MM, 0.90 MM HEIGHT, PLASTIC, QFN-16 |
| 文件页数： | 62/88页 |
| 文件大小： | 2310K |
| 代理商： | MCP4531T-503E/ML |
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2008 Microchip Technology Inc.
DS22096A-page 65
MCP453X/455X/463X/465X
8.4
Using the General Call Command
The use of the General Call Address Increment, Decre-
ment, or Write commands is analogous to the “Load”
feature (LDAC pin) on some DACs (such as the
MCP4921). This allows all the devices to “Update” the
output level “at the same time”.
For some applications, the ability to update the wiper
values “at the same time may be a requirement, since
they delay from writing to one wiper value and then the
next may cause application issues. A possible example
would be a “tuned” circuit that uses several MCP45XX/
46XX in rheostat configuration. As the system condition
changes (temperature, load, ...) these devices need to
be changed (incremented/decremented) to adjust for
the system change. These changes will either be in the
same direction or in opposite directions. With the
Potentiometer device the customer can either select
the PxB terminals (same direction) or the PxA
terminal(s) (opposite direction).
Figure 8-6 shows that the update of six devices takes
6*TI2CDLY time in “normal” operation, but only
1*TI2CDLY time in “General Call” operation.
cases, the single I2C bus configuration will be
adequate. For applications that do not want all the
MCP45XX/46XX devices to do General Call support or
have a conflict with General Call commands, the
multiple I2C bus configuration would be used.
FIGURE 8-5:
Typical Application I2C Bus
Configurations.
FIGURE 8-6:
Example Comparison of “Normal Operation” vs. “General Call Operation” wiper
Updates.
Note:
The application system may need to
partition the I2C bus into multiple busses to
ensure that the MCP45XX/46XX General
Call commands do not conflict with the
General Call commands that the other I2C
devices may have defined. Also if only a
portion of the MCP45XX/46XX devices are
to require this synchronous operation,
then the devices that should not receive
these commands should be on the second
I2C bus.
Single I2C Bus Configuration
Host
Controller
Device 1
Device 3
Device n
Device 2
Device 4
Multiple I2C Bus Configuration
Host
Controller
Device 1a
Device 3a
Device na
Device 2a
Device 4a
Device 1b
Device 3b
Device nb
Device 2b
Device 4b
Bus b
Bus a
Device 1n
Device 3n
Device nn
Device 2n
Device 4n
Bus n
Normal Operation
General Call Operation
INC
POT01
INC
POT02
INC
POT03
INC
POT04
INC
POT05
INC
POT06
TI2CDLY
TI2CDLY = Time from one I
2C command completed to completing the next I2C command.
INC
POTs 01-06
INC
POTs 01-06
INC
POTs 01-06
INC
POTs 01-06
INC
POTs 01-06
INC
POTs 01-06
TI2CDLY
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MCP4532-103E/MS | 功能描述:数字电位计 IC Sngl 7B V I2C Rheo RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel |
| MCP4532-104E/MS | 功能描述:数字电位计 IC Sngl 7B V I2C Rheo RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel |
| MCP4532-104E/MS | 制造商:Microchip Technology Inc 功能描述:; LEADED PROCESS COMPATIBLE:YES; PEAK RE |
| MCP4532-502E/MS | 功能描述:数字电位计 IC Sngl 7B V I2C Rheo RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel |
| MCP4532-502E/MS | 制造商:Microchip Technology Inc 功能描述:; LEADED PROCESS COMPATIBLE:YES; PEAK RE |
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