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| 型号： | MCP4662T-502E/MF |
| 厂商： | Microchip Technology |
| 文件页数： | 48/92页 |
| 文件大小： | 0K |
| 描述： | IC DGTL POT 5K 256TAPS 10-DFN |
| 标准包装： | 1 |
| 接片： | 257 |
| 电阻（欧姆）： | 5k |
| 电路数： | 2 |
| 温度系数： | 标准值 150 ppm/°C |
| 存储器类型： | 非易失 |
| 接口： | I²C（设备位址） |
| 电源电压： | 2.7 V ~ 5.5 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-VFDFN 裸露焊盘 |
| 供应商设备封装： | 10-DFN-EP（3x3） |
| 包装： | 标准包装 |
| 产品目录页面： | 677 (CN2011-ZH PDF) |
| 其它名称： | MCP4662T-502E/MFDKR |
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MCP454X/456X/464X/466X
DS22107A-page 52
2008 Microchip Technology Inc.
6.2.7
GENERAL CALL
The General Call is a method that the “Master” device
can communicate with all other “Slave” devices. In a
Multi-Master application, the other Master devices are
operating in Slave mode. The General Call address
has two documented formats. These are shown in
Figure 6-11. We have added a MCP45XX/46XX format
in this figure as well.
This will allow customers to have multiple I2C Digital
Potentiometers on the bus and have them operate in a
synchronous fashion (analogous to the DAC Sync pin
functionality). If these MCP45XX/46XX 7-bit com-
mands conflict with other I2C devices on the bus, then
the customer will need two I2C busses and ensure that
the devices are on the correct bus for their desired
application functionality.
Dual Pot devices can not update both Pot0 and Pot1
from a single command. To address this, there are
General Call commands for the Wiper 0, Wiper 1, and
the TCON registers.
Table 6-3 shows the General Call Commands. Three
commands are specified by the I2C specification and
are not applicable to the MCP45XX/46XX (so com-
mand is Not Acknowledged) The MCP45XX/46XX
General Call Commands are Acknowledge. Any other
command is Not Acknowledged.
TABLE 6-3:
GENERAL CALL COMMANDS
Note:
Only one General Call command per issue
of the General Call control byte. Any addi-
tional General Call commands are ignored
and Not Acknowledged.
7-bit
Command
(1, 2, 3)
Comment
‘1000 00d’b Write Next Byte (Third Byte) to Volatile
Wiper 0 Register
‘1001 00d’b Write Next Byte (Third Byte) to Volatile
Wiper 1 Register
‘1100 00d’b Write Next Byte (Third Byte) to TCON
Register
‘1000 010’b
or
‘1000 011’b
Increment Wiper 0 Register
‘1001 010’b
or
‘1001 011’b
Increment Wiper 1 Register
‘1000 100’b
or
‘1000 101’b
Decrement Wiper 0 Register
‘1001 100’b
or
‘1001 101’b
Decrement Wiper 1 Register
Note 1:
Any other code is Not Acknowledged.
These codes may be used by other
devices on the I2C bus.
2:
The 7-bit command always appends a “0”
to form 8-bits. .
3:
“d” is the D8 bit for the 9-bit write value.
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