ICS954204 Datasheet, PDF (12/16 Pages) Integrated Circuit Systems – Programmable Timing Control HubTM for Mobile P4TM Systems

Integrated
Circuit
Systems, Inc.
ICS954204
SMBus Table: DO T PD Mode an d O u tput Free-Running Contro l Reg ister
Byte 4
Bit 7
Pin #
N am e
Control Function
Reserved
Bit 6
14, 15
DOT_96MHz Power Down
Mode
Driv en in PD
Bit 5
Bit 4
9
Bit 3
8
PCICLK_F1
PCICLK_F0
Reserved
Free-Running Control, not
affec ted by
PCI/SRC_STO P#
Bit 2
Bit 1
Bit 0
35, 36
40, 41
43, 44
CPUCLK_2
CPUCLK_1
CPUCLK_0
Free-Running Control, not
affec ted by CPU_STO P#
SMBus Table: O utput Mod e Control Register
Byte 5
Pin #
N am e
Bit 7
17-20, 22-27,
30, 31, 35, 36
SRC(7:0)
PCI/SRC_STO P# Driv e
Mode
Bit 6
35, 36
C PU C L K2_ IT P
CPU_STO P# Drive Mode
Bit 5
40, 41
CPUCLK_1 CPU_STOP#
Driv e Mode
Bit 4
43, 44
CPUCLK_0 CPU_STOP#
Driv e Mode
17-20, 22-27, SRC(7:0), 96MHz_SS
Bit 3 _{30, 31, 35, 36}
PD Driv e Mode
Control Function
Driv en in PCI/SRC_STO P#
Driven in CPU_ST O P#
Driven in CPU_ST O P#
Driven in CPU_ST O P#
Driv en in PD
Bit 2
Bit 1
35, 36
40, 41
CPUCLK2_ITP PD Driv e
Mode
CPUCLK_1 PD Drive Mode
Driv en in PD
Driv en in PD
Bit 0
43, 44 CPUCLK_0 PD Drive Mode
Driv en in PD
SMBus Table: Test Mode, FS Readback, and PCI Stop# Control Register
Byte 6
Pin #
N am e
Control Function
Bit 7
T est Mode Selection
-
(Activ e only when B6b6 =
Test Mode Selec tion
1)
Bit 6
-
Test Clock Mode Entry
Test Mode
Bit 5
Bit 4
52
REFOUT STRENGTH
Reserved
Strength Prog
Bit 3
-
PCI/SRC_STO P#
Stop all PCI and SRC cloc ks
Bit 2
53
Bit 1
16
Bit 0
12
F S_C
FS_B
FS_A
Readback
Readback
Readback
Type
RW
RW
RW
RW
RW
RW
Type
RW
RW
RW
RW
RW
RW
RW
RW
Type
RW
RW
RW
RW
RW
RW
RW
0
Driv en
1
H i- Z
F r ee - R un ning
F r ee - R un ning
F r ee - R un ning
F r ee - R un ning
F r ee - R un ning
Stoppable
Stoppable
Stoppable
Stoppable
Stoppable
0
Driv en
Driv en
Driv en
Driv en
Driv en
Driv en
Driv en
Driv en
1
H i- Z
H i- Z
H i- Z
H i- Z
H i- Z
H i- Z
H i- Z
H i- Z
PWD
0
0
0
0
0
1
1
1
PWD
0
0
0
0
0
0
0
0
0
H i- Z
Normal
O peration
1X
O utputs
Stopped
-
-
-
1
REF/N
Test Mode
per B6b7
2X
O utputs
Activ e
-
-
-
PWD
0
0
-
1
1
LATCHED
LATCHED
LATCHED
0933D—03/16/05
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