MIC2778 Micrel Semiconductor, MIC2778 Datasheet - Page 20

• Manufacturer Part Number: MIC2778
• Description: Mic2778 Voltage Monitor With Adjustable Hysteresis
• Manufacturer: Micrel Semiconductor

March 2005
DATA
CLK
VAUX_OUT[A/B]
/PWRGD_[A/B]
S 1 0 0 0 A2 A1 A0
MIC2592B Device Address
START
/FAULT_[A/B]
12VOUT[A/B]
AUXEN[A/B]
3VOUT[A/B]
I
AUX_OUT[A/B]
VSTBY
I
ON[A/B]
3VOUT[A/B]
DATA
CLK
/INT*
S 1 0 0 0 A2 A1 A0 0 A 0 0 0 0 0 0 X X A
R/W = WRITE
MIC2592B Device Address
0
0
0
0
0
0
0
0
0
0
0
START
I
I
I
I
STEADY-STATE
STEADY-STATE
LIM(3V)
LIM(AUX)
UVLO
t POR
0 A 0 0 0 0 0 0 X X A S 1
+3.3V
DATA
CLK
V
Command Byte to MIC2592B
ACKNOWLEDGE
IH
R/W = WRITE
Figure 9. Hot-Plug Interface Operation
Figure 12. RECEIVE_BYTE Protocol
Master to device transfer,
i.e., DATA driven by master.
S 1 0 0 0 A2 A1 A0 1 A
Master to device transfer,
i.e., DATA driven by master.
MIC2592B Device Address
Figure 10. WRITE_BYTE Protocol
START
Figure 11. READ_BYTE Protocol
Master to device transfer,
i.e., DATA driven by master.
Command Byte to MIC2592B
ACKNOWLEDGE
ACKNOWLEDGE
t FLT
R/W = READ
V
IL
20
*
* /INT de-asserted by software
MIC2592B Device Address
ACKNOWLEDGE
START
V
IH
ACKNOWLEDGE NOT ACKNOWLEDGE
V
Byte Read from MIC2592B
D7
0 0
IH
Device to master transfer,
i.e., DATA driven by device.
D6
Device to master transfer,
i.e., DATA driven by device.
D5
0
Device to master transfer,
i.e., DATA driven by device.
D7
A2 A1 A0
D4
Data Byte to MIC2592B
R/W = READ
D6
D3 D2 D1 D0
D5
D4
1
D3 D2 D1 D0
A D7
ACKNOWLEDGE
ACKNOWLEDGE NOT ACKNOWLEDGE
Data Read From MIC2592B
/A P
t FLT
D6
V
IL
STOP
D5
D4
A P
*
D3 D2 D1 D0
V
STOP
IH
/A P
STOP
M9999-033105