ICS950227 Datasheet, PDF (5/17 Pages) Integrated Circuit Systems – Programmable Timing Control Hub for P4

Integrated
Circuit
Systems, Inc.
ICS950227
I²C Table: Frequency Select Register
Byte 0
Bit 7
Pin #
-
Name
SPREAD ENABLE
Control Function
Frequency H/W IIC
Select
Bit 6
-
CENTER/DOWNSP CENTER/DOWNSPRE
READ SELECT
AD SELECT
Bit 5
35
3V66/VCH SELECT 48MHz/66.66MHz SEL
Bit 4
53
CPU_STOP# CPU STOP Read Back
Bit 3
Bit 2
Bit 1
Bit 0
34
PCI_STOP#
HW/SW SELECT
Freq Select Bit 3
40
FS2
Freq Select 2 Read
Back
55
FS1
Freq Select 1 Read
Back
54
FS0
Freq Select 0 Read
Back
Type
RW
RW
RW
R
RW/R
R
R
R
0
1
OFF
ON
DOWN
SPREAD
66.66MHz
CENTER
SPREAD
48.00MHz
READBACK
PCI STOP
PCI
RUNNING
READBACK
PWD
0
0
0
X
1
X
X
X
I²C Table: Spreading and Device Behavior Control Register
Byte 1
Bit 7
Bit 6
Pin #
43
-
Name
MULTSEL0
WD ALARM
Control Function
MULTSEL0
READBACK
Watchdog Alarm Read
Back
Bit 5
45, 44
CPU2/CPUC2
Bit 4
49, 48
CPU FREE-RUN NING
CPU1/CPUC1
CONTROL
Bit 3
52, 51
CPU0/CPUC0
Bit 2
Bit 1
Bit 0
45, 44
49, 48
52, 51
CPU2/CPUC2
CPU1/CPUC1
CPU0/CPUC0
Output Control
Output Control
Output Control
Type
R
R
RW
RW
RW
RW
RW
RW
0
1
READBACK
NO ALARM ALARM SET
STOPPABLE FREE-RUN
STOPPABLE FREE-RUN
STOPPABLE FREE-RUN
Disable
Disable
Disable
Enable
Enable
Enable
PWD
X
0
0
0
0
1
1
1
I²C Table: Output Control Register
Byte 2
Pin #
Name
Bit 7
-
Reserved
Bit 6
18
Bit 5
17
PCICLK6
PCICLK5
Bit 4
16
PCICLK4
Bit 3
13
Bit 2
12
PCICLK3
PCICLK2
Bit 1
11
PCICLK1
Bit 0
10
PCICLK0
Control Function
Reserved
Output Control
Output Control
Output Control
Output Control
Output Control
Output Control
Output Control
Type
RW
RW
RW
RW
RW
RW
RW
RW
0
-
Disable
Disable
Disable
Disable
Disable
Disable
Disable
1
-
Enable
Enable
Enable
Enable
Enable
Enable
Enable
PWD
0
1
1
1
1
1
1
1
I²C Table: Output Control Register
Byte 3
Bit 7
Bit 6
Pin #
38
39
Name
48MHz_DOT
48MHz_USB
Bit 5
7
PCIF2
Bit 4
6
PCIF1
Bit 3
5
Bit 2
7
Bit 1
6
Bit 0
5
0641D—07/03/03
PCIF0
PCICLK_F2
PCICLK_F1
PCICLK_F0
Control Function
Output Control
Output Control
CPU FREE-RUN NING
CONTROL
Output Control
Output Control
Output Control
Type
RW
RW
RW
RW
RW
RW
RW
RW
0
Disable
Disable
1
Enable
Enable
FREE-RUN STOPPABLE
FREE-RUN STOPPABLE
FREE-RUN STOPPABLE
Disable
Disable
Disable
Enable
Enable
Enable
PWD
1
1
0
0
0
1
1
1
5