9248AF-128LF Integrated Device Technology, 9248AF-128LF Datasheet - Page 3

no-image

9248AF-128LF

Manufacturer Part Number
9248AF-128LF
Description
Manufacturer
Integrated Device Technology
Datasheet
Power Management Functionality
General Description
The ICS9248-128 is the single chip clock solution for Desktop/Notebook designs using the SIS style chipset. It provides all
necessary clock signals for such a system.
Spread spectrum may be enabled through I
This simplifies EMI qualification without resorting to board design iterations or costly shielding. The ICS9248-128 employs a
proprietary closed loop design, which tightly controls the percentage of spreading over process and temperature variations.
Serial programming I
latched input allows
(SD_SEL=0)
CPU 3.3#_2.5V Buffer selector for CPUCLK drivers.
Mode Pin - Power Management Input Control
Third party brands and names are the property of their respective owners.
PD#
0
1
1
1
1
1
1
1
1
L (
C
L (
M
P
n I
t a
t a
U
h c
O
p
CPU_STOP# PCI_STOP# SDRAM_STOP
h c
. 3
u
D
d e
l t
0
1
# 3
d e
, E
0
1
v e
D
X
1
1
1
1
0
0
0
0
2 _
P
n I
l e
t a
n i
5 .
) a
u p
2
) t
f
B
r o
2
C interface allows changing functions, stop clock programming and frequency selection. The SD_SEL
u
the SDRAM frequency to follow the CPUCLK frequency(SD_SEL=1) or other clock frequencies
2
3
f f
o
5 .
3 .
X
1
1
0
0
1
1
0
0
p
r e
r e
V
V
C
S
(
e S
P
O
t a
D
V
V
I (
U
P
U
N
R
e l
o i
D
D
n i
_
T
A
P
t c
D
n
D
S
P
U
7 1
T
M
d e
a
U
O
) T
: t
) T
1 1
P
X
1
0
1
0
1
0
1
0
#
2
C programming. Spread spectrum typically reduces system EMI by 8dB to 10dB.
Stopped
Running
Running
Stopped
Stopped
Running
Running
Stopped
Stopped
PCICLK
P
S
(0:4)
(
Low
Low
Low
Low
Low
C
O
D
I (
P
_ I
U
R
N
n i
T
S
A
P
T
P
U
M
8 1
O
U
) T
) T
P
0 1
Stopped
Running
Stopped
Running
Stopped
Running
Stopped
Running
Stopped
SDRAM
#
(0:12)
3
Low
Low
Low
Low
Low
S
PCICLK_F
D
Stopped
Running
Running
Running
Running
Running
Running
Running
Running
(
R
S
Low
O
I (
A
D
P
U
N
M
n i
R
T
P
A
_
P
U
0 2
S
M
U
) T
T
) T
9
CPUCLK
O
Stopped
Running
Running
Running
Running
Stopped
Stopped
Stopped
Stopped
P
Low
Low
Low
Low
Low
#
Stopped
Running
Running
Running
Running
Running
Running
Running
Running
Crystal
(
S
O
OSC
Low
I (
D
P
U
N
P
ICS9248-128
n i
R
T
D
P
A
P
U
1 2
#
M
U
) T
) T
8
Stopped
Running
Running
Running
Running
Running
Running
Running
Running
VCO
Low

Related parts for 9248AF-128LF