MIC2592B Datasheet, PDF (20/31 Pages) Micrel Semiconductor – Dual-Slot PCI Express Hot-Plug Controller

MIC2592B
VSTBY
UVLO
+3.3V
0
AUXEN[A/B]
V_IH
0
tPOR
VAUX_OUT[A/B]
0
I_LIM(AUX)
I_{AUX_OUT[A/B]}
I_STEADY-STATE
0
ON[A/B]
0
12VOUT[A/B]
0
3VOUT[A/B]
0
/PWRGD_[A/B]
0
I_LIM(3V)
I_3VOUT[A/B]
I_STEADY-STATE
0
V_IL
V_IH
tFLT
V_IH
V_IH
V_IL
tFLT
/FAULT_[A/B] ₀
/INT*
0
*
*
* /INT de-asserted by software
Figure 9. Hot-Plug Interface Operation
Micrel
MIC2592B Device Address Command Byte to MIC2592B Data Byte to MIC2592B
DATA S 1 0 0 0 A2 A1 A0 0 A 0 0 0 0 0 0 X X A D7 D6 D5 D4 D3 D2 D1 D0 A P
START
R/W = WRITE
ACKNOWLEDGE
ACKNOWLEDGE
ACKNOWLEDGE
STOP
CLK
Master to device transfer,
i.e., DATA driven by master.
Device to master transfer,
i.e., DATA driven by device.
MIC2592B Device Address
Figure 10. WRITE_BYTE Protocol
Command Byte to MIC2592B MIC2592B Device Address
Data Read From MIC2592B
DATA S 1 0 0 0 A2 A1 A0 0 A 0 0 0 0 0 0 X X A S 1 0 0 0 A2 A1 A0 1 A D7 D6 D5 D4 D3 D2 D1 D0 /A P
START
R/W = WRITE
ACKNOWLEDGE
ACKNOWLEDGE
START
R/W = READ
ACKNOWLEDGE NOT ACKNOWLEDGE
STOP
CLK
Master to device transfer,
i.e., DATA driven by master.
Device to master transfer,
i.e., DATA driven by device.
Figure 11. READ_BYTE Protocol
MIC2592B Device Address Byte Read from MIC2592B
DATA S 1 0 0 0 A2 A1 A0 1 A D7 D6 D5 D4 D3 D2 D1 D0 /A P
START
R/W = READ
ACKNOWLEDGE NOT ACKNOWLEDGE
STOP
CLK
Master to device transfer,
i.e., DATA driven by master.
Device to master transfer,
i.e., DATA driven by device.
Figure 12. RECEIVE_BYTE Protocol
March 2005
20
M9999-033105