ICS9DB401C Datasheet, PDF (10/17 Pages) Integrated Device Technology – Four Output Differential Buffer for PCI Express

ICS9DB401C
Four Output Differential Buffer for PCI Express
SMBus Table: Frequency Select Register, READ/WRITE ADDRESS (DC/DD)
Byte 0 Pin #
Name
Control Function
Type
0
1
Bit 7
-
PD_Mode
PD# drive mode
RW driven
Hi-Z
Bit 6
-
STOP_Mode SRC_Stop# drive mode RW driven
Hi-Z
Bit 5
-
PD_SRC_INV
Power Down
and SRC Invert
RW Normal
Invert
Bit 4
-
Reserved
Reserved
RW
Reserved
Bit 3
-
Reserved
Reserved
RW
Reserved
Bit 2
-
PLL_BW#
Select PLL BW
RW High BW Low BW
Bit 1
-
BYPASS#
BYPASS#/PLL
RW fan-out
ZDB
Bit 0
-
SRC_DIV#
SRC Divide by 2 Select RW
x/2
1x
PWD
0
0
0
X
X
1
1
1
SMBus Table: Output Control Register
Byte 1 Pin #
Name
Bit 7
-
Reserved
Bit 6
22,23
DIF_6
Bit 5
19,20
DIF_5
Bit 4
-
Reserved
Bit 3
-
Reserved
Bit 2
9,10
DIF_2
Bit 1
6,7
DIF_1
Bit 0
-
Reserved
Control Function
Reserved
Output Control
Output Control
Reserved
Reserved
Output Control
Output Control
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
Bit 7
-
Reserved
Bit 6
22,23
DIF_6
Bit 5
19,20
DIF_5
Bit 4
-
Reserved
Bit 3
-
Reserved
Bit 2
9,10
DIF_2
Bit 1
6,7
DIF_1
Bit 0
-
Reserved
Control Function
Reserved
Output Control
Output Control
Reserved
Reserved
Output Control
Output Control
Reserved
Type
RW
RW
RW
RW
RW
RW
RW
RW
0
1
Reserved
Free-run Stoppable
Free-run Stoppable
Reserved
Reserved
Free-run Stoppable
Free-run Stoppable
Reserved
PWD
X
0
0
X
X
0
0
X
SMBus Table: Output Control Register
Byte 3 Pin #
Name
Control Function
Bit 7
Reserved
Bit 6
Reserved
Bit 5
Reserved
Bit 4
Reserved
Bit 3
Reserved
Bit 2
Reserved
Bit 1
Reserved
Bit 0
Reserved
Type
RW
RW
RW
RW
RW
RW
RW
RW
0
1
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
PWD
X
X
X
X
X
X
X
X
IDT^TM/ICS^TM Four Output Differential Buffer for PCI Express
10
ICS9DB401C REV E 03/18/08