ics9fg1201 Integrated Device Technology, ics9fg1201 Datasheet - Page 8

• Manufacturer Part Number: ics9fg1201
• Description: Frequency Generator For P4tm Cpu, Pci-express* & Fully Buffered Dimm Clocks
• Manufacturer: Integrated Device Technology

IDT
SMBusTable: Gear Ratio Select Register
SMBusTable: Output Control Register
SMBusTable: Output and PLL BW Control Register
SMBusTable: Output Enable Readback Register
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
ICS9FG1201H
Frequency Generator for CPU, PCIe Gen1* & Fully Buffered DIMM Clocks
TM
Byte 0
Byte 1
Byte 2
Byte 3
/ICS
TM
Note: Bit 6 is wired OR to the pin 1 input, any 0 selects High BW
Note: Bit 5 is wired OR to the pin 30 input, any 0 selects Fanout Bypass mode
Frequency Generator for CPU, PCIe Gen1* & Fully Buffered DIMM Clocks
DIF(11:10)
see note
see note
DIF(9:0)
35, 36
32, 33
24, 25
19,20
16,17
13,14
51,52
47,48
42,43
39,40
9,10
6,7
34
31
26
21
18
15
8
5
-
-
-
-
-
-
Pin #
Pin #
Pin #
Pin #
DIF_11
DIF_10
Name
Name
DIF_7
DIF_6
DIF_5
DIF_4
DIF_3
DIF_2
DIF_1
DIF_0
Name
DIF_9
DIF_8
Name
Group of 10 gear ratio enable
Gear Ratio FS4 (FS_A_410)
Group of 2 gear ratio enable
BYPASS# test mode / PLL
Readback - OE7# Input
Readback - OE6# Input
Readback - OE5# Input
Readback - OE4# Input
Readback - OE3# Input
Readback - OE2# Input
Readback - OE1# Input
Readback - OE0# Input
PLL_BW# adjust
Gear Ratio FS3
Gear Ratio FS2
Gear Ratio FS1
Gear Ratio FS0
Reserved
Reserved
Reserved
Control Function
Control Function
Control Function
Control Function
Output Control
Output Control
Output Control
Output Control
Output Control
Output Control
Output Control
Output Control
Output Control
Output Control
Output Control
Output Control
8
Type
Type
Type
Type
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
R
R
R
R
R
R
R
R
Gear Ratio
Gear Ratio
High BW
Bypass
Programmable Gear
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
0
0
0
0
See 9FG1201
Ratios Table
Readback
Readback
Readback
Readback
Readback
Readback
Readback
Readback
Low BW
Enable
Enable
Enable
Enable
Enable
Enable
Enable
Enable
Enable
Enable
Enable
Enable
PLL
1:1
1:1
1
1
1
1
Latch
PWD
PWD
PWD
PWD
X
X
X
X
X
X
X
X
1371C — 02/12/08
1
1
1
1
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1