Microchip Technology ADM00317 데이터 시트
© 2011-2012 Microchip Technology Inc.
DS22272C-page 57
MCP4706/4716/4726
6.6.2
GENERAL CALL WAKE-UP
If the second byte is “00001001” (09h), the device
forces the volatile power-down bits to ‘00’. The
nonvolatile (EEPROM) power-down bit values are not
affected by this command.
forces the volatile power-down bits to ‘00’. The
nonvolatile (EEPROM) power-down bit values are not
affected by this command.
This command allows multiple MCP47X6 devices to
wake-up synchronously.
wake-up synchronously.
FIGURE 6-8:
General Call Wake-Up Command.
Note:
This command does not adhere to the I
2
C
specification where if the LSb of the 2nd
byte is a ‘1’, it is a ‘Hardware General Call’
(see the NXP I
byte is a ‘1’, it is a ‘Hardware General Call’
(see the NXP I
2
C Specification).
General Call Address
Note 1:
At the falling edge of the SCL, at the end of this ACK pulse, the volatile PD1:PD0 bits are forced to ‘00’.
Note 1
2:
The 2nd byte can be repeated after the 2nd by continued clocking before issuing Stop bit.
General Call Wake-Up
3:
ACK bit generated by MCP47X6.
Note 2
SDA
SCL
0
0
0
0
0
0
0
0
0
0
0
0
Start bit
ACK bit
(
3
)
Read/Write bit (Write)
Stop bit
S
A
R/W
A
ACK bit
(
3
)
0
P
0
1
0
0
1
Command