Microchip Technology ADM00317 Data Sheet
MCP4706/4716/4726
DS22272C-page 48
© 2011-2012 Microchip Technology Inc.
5.3.7
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
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
.
The MCP47X6 has two General Call commands. The
function of these commands are:
function of these commands are:
• Reset the device(s) (Software Reset)
• Wake-Up the device(s)
For details on the operation of the MCP47X6’s General
Call commands, see
Call commands, see
FIGURE 5-11:
General Call Formats.
Note:
Only one General Call command per issue
of the General Call control byte. Any
additional General Call commands are
ignored and Not Acknowledged.
of the General Call control byte. Any
additional General Call commands are
ignored and Not Acknowledged.
0
0
0
0
S
0
0
0
0
X
x
x
x
x
A
x
x
0
A P
General Call Address
Second Byte
“7-bit Command”
Reserved 7-bit Commands (By I
2
C Specification – NXP specification # UM10204, Rev. 03 19 June 2007)
‘0000 011’
b - Reset and write programmable part of slave address by hardware
‘0000 010’
b - Write programmable part of slave address by hardware
‘0000 000’
b - NOT Allowed
The Following is a “Hardware General Call” Format
0
0
0
0
S
0
0
0 0
X
x
x
x
x
A
x
x
1
A
General Call Address
Second Byte
“Master Address”
X
x
x
x
x
x
x
X
A P
n occurrences of (Data + A)
This indicates a “Hardware General Call”