ICS932S431A Datasheet, PDF (13/22 Pages) Integrated Device Technology – Low drift PCIe clocks for Non-Transparent Bridging

Integrated
Circuit
Systems, Inc.
ICS932S431A
Datasheet
SMBus Table: Stop and Power Down Mode Drive Control Register
Byte 4
Pin #
Name
Control Function
Bit 7
36,37
CPUCLK3 PD Drive
Drive Mode in PD
Bit 6
39,40
CPUCLK2 PD Drive
Drive Mode in PD
Bit 5
42,43
CPUCLK1 PD Drive
Drive mode in PD
Bit 4
45,46
CPUCLK0 PD Drive
Drive mode in PD
Bit 3
Bit 2
Bit 1
Bit 0
36,37
39,40
42,43
45,46
CPUCLK3 Stop En
CPUCLK2 Stop En
CPUCLK1 Stop En
CPUCLK0 Stop En
Free-Running Control,
Default: not affected by
CPU_STOP
Type
RW
RW
RW
RW
RW
RW
RW
RW
0
Driven
Driven
Driven
Driven
Free-Running
Free-Running
Free-Running
Free-Running
1
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Stoppable
Stoppable
Stoppable
Stoppable
PWD
0
0
0
0
1
1
1
1
SMBus Table: Stop and Power Down Mode Drive Control Register
Byte 5
Pin #
Name
Control Function
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
SRC
SRC
36,37
39,40
42,43
45,46
SRC Stop Drive Mode
SRC PD Drive Mode
CPUCLK3 Stop Drive
CPUCLK2 Stop Drive
CPUCLK1 Stop Drive
CPUCLK0 Stop Drive
RESERVED
Driven in STOP
Driven in PD
RESERVED
Drive Mode in Stop
Drive Mode in Stop
Drive Mode in Stop
Drive Mode in Stop
Type
RW
RW
RW
RW
RW
RW
0
Driven
Driven
Driven
Driven
Driven
Driven
1
PWD
0
Hi-Z
0
Hi-Z
0
0
Hi-Z
0
Hi-Z
0
Hi-Z
0
Hi-Z
0
SMBus Table: Test Mode and FS Readback Register
Byte 6
Pin #
Name
Bit 7
-
Test Mode Selection
Bit 6
-
Test Clock Mode Entry
Bit 5
-
Bit 4
54,55
REF Drive Strength
Bit 3
PCI, SRC
PCI_STOP Control
Bit 2
-
Bit 1
-
Bit 0
-
FS_C
FS_B
FS_A
Control Function Type
Test Mode Selection RW
Test Mode
RW
RESERVED
1X or 2X
RW
Stop non-free running PC _RW
and SRC clocks.
FS_C readback
R
FS_B readback
R
FS_A readback
R
0
Hi-Z
Disable
1
REF/N
Enable
1X
2X
Stop
Run
See 932s431 Functionality
Table
PWD
0
0
0
1
1
Latch
Latch
Latch
SMBus Table: Vendor & Revision ID Register
Byte 7
Pin #
Name
Bit 7
-
RID3
Bit 6
-
RID2
Bit 5
-
RID1
Bit 4
-
RID0
Bit 3
-
VID3
Bit 2
-
VID2
Bit 1
-
VID1
Bit 0
-
VID0
Control Function Type
0
R
-
REVISION ID
R
-
(0 for A rev)
R
-
R
-
R
-
R
-
VENDOR ID
R
-
R
-
1
PWD
-
0
-
0
-
0
-
0
-
0
-
0
-
0
-
1
1426A—11/12/09
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