ICS9DB401 Datasheet, PDF (9/16 Pages) Integrated Circuit Systems – Four Output Differential Buffer for PCI Express

Integrated
Circuit
Systems, Inc.
ICS9DB401
SMBus Table: Frequency Select Register, READ/WRITE ADDRESS (DC/DD)
Byte 0 Pin # Name
Control Function Type 0
1 PWD
Bit 7
-
PD_Mode
PD# drive mode
RW driven Hi-Z
0
Bit 6
-
STOP_Mode SRC_Stop# drive mode RW driven Hi-Z
0
Bit 5
-
PD_SRC_INV
Power Down
and SRC Invert
RW Normal Invert 0
Bit 4
-
Reserved
Reserved
RW
Reserved
X
Bit 3
-
Reserved
Reserved
RW
Reserved
X
Bit 2
-
PLL_BW#
Select PLL BW
RW High BW Low BW 1
Bit 1
-
BYPASS#
BYPASS#/PLL
RW fan-out ZDB
1
Bit 0
-
SRC_DIV# SRC Divide by 2 Select RW x/2
1x
1
SMBus Table: Output Control Register
Byte 1 Pin # Name
Control Function
Bit 7
-
Reserved
Reserved
Bit 6 22,23
DIF_6
Output Control
Bit 5 19,20
DIF_5
Output Control
Bit 4
-
Reserved
Reserved
Bit 3
-
Reserved
Reserved
Bit 2
9,10
DIF_2
Output Control
Bit 1
6,7
DIF_1
Output Control
Bit 0
-
Reserved
Reserved
Type
RW
RW
RW
RW
RW
RW
RW
RW
0
1
Reserved
Disable Enable
Disable Enable
Reserved
Reserved
Disable Enable
Disable Enable
Reserved
PWD
X
1
1
X
X
1
1
X
SMBus Table: Output Control Register
Byte 2 Pin # Name
Control Function
Bit 7
-
Reserved
Reserved
Bit 6 22,23
DIF_6
Output Control
Type
RW
0
1
Reserved
PWD
X
RW Free-run Stoppable 0
Bit 5
Bit 4
Bit 3
Bit 2
19,20
-
-
9,10
DIF_5
Reserved
Reserved
DIF_2
Output Control
Reserved
Reserved
Output Control
RW Free-run Stoppable 0
RW
Reserved
X
RW
Reserved
X
RW Free-run Stoppable 0
Bit 1
6,7
Bit 0
-
DIF_1
Reserved
Output Control
Reserved
RW Free-run Stoppable 0
RW
Reserved
X
1014B—09/07/06
9