Integrated
Circuit
Systems, Inc.
ICS952621
I C Table: Read-Back Register
Pin #
Byte 0
-
Bit 7
-
Bit 6
-
Bit 5
-
Bit 4
-
Bit 3
-
Bit 2
Bit 1
Bit 0
-
-
2
Name
Control Function
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
Freq Select 1 Read
FSB
Back
Freq Select 0 Read
FSA
Back
Type
-
-
-
R
R
R
R
R
0
1
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
READBACK of
CPU(2:0) Frequency
PWD
X
X
X
X
X
X
X
X
I C Table: Spreading and Device Behavior Control Register
Name
Control Function
Pin #
Byte 1
SRC Free-Running
SRC/SRC#
Bit 7
Control
SRC
Output Control
Bit 6
RESERVED
Bit 5
RESERVED
Bit 4
RESERVED
Bit 3
RESERVED
Bit 2
CPUT1/CPUC1
Output Control
Bit 1
CPUT0/CPUC0
Output Enable
Bit 0
2
Type
RW
RW
R
R
R
R
RW
RW
0
1
FREE- STOPPAB
RUN
LE
Disable
Enable
RESERVED
RESERVED
RESERVED
RESERVED
Disable
Enable
Disable
Enable
PWD
0
1
X
X
X
X
1
1
I C Table: Output Control Register
Pin #
Byte 2
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
2
Name
SRC_PD#
Drive Mode
SRC_Stop#
Drive Mode
RESERVED
CPUT1_PD# Drive Mode
CPUT0_PD# Drive Mode
RESERVED
RESERVED
RESERVED
Control Function
0: Driven in PD#
0: Driven in
PCI_Stop#
RESERVED
0:driven in PD#
1: Tri-stated
RESERVED
RESERVED
RESERVED
Type
RW
RW
-
RW
RW
-
-
-
0
Driven
Driven
1
Hi-Z
Hi-Z
PWD
0
0
X
0
0
X
X
X
RESERVED
Driven
Hi-Z
Driven
Hi-Z
RESERVED
RESERVED
RESERVED
I C Table: Output Control Register
Pin #
Byte 3
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0756A—09/10/04
2
Name
PCI_Stop#
RESERVED
PCICLK5
PCICLK4
PCICLK3
PCICLK2
PCICLK1
PCICLK0
Control Function
PCI_Stop# Control
0:all stoppable PCI
are stopped
RESERVED
Output Control
Output Control
Output Control
Output Control
Output Control
Output Control
Type
RW
-
RW
RW
RW
RW
RW
RW
0
Enable
1
Disable
PWD
1
X
1
1
1
1
1
1
RESERVED
Disable
Enable
Disable
Enable
Disable
Enable
Disable
Enable
Disable
Enable
Disable
Enable
9
ICS [ INTEGRATED CIRCUIT SYSTEMS ]
