FS6158-01 Ver la hoja de datos (PDF) - AMI Semiconductor
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FS6158-01 Datasheet PDF : 14 Pages
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FS6158-01
Two-Way/Four Way Motherboard Clock Generator/Buffer IC
1.0 Features
• Generates the Host and Memory clocks required for
2-way and 4-way multi-processor (MP) clock-
partitioned platforms, including:
M Six differential current-mode Host clock pairs
M Two 3.3V Memory Reference clocks
M 66.67MHz and 14.318MHz 3.3V Reference
clocks for the FS6159 device
M Three optional 33.3MHz 1.8V APIC clocks
• Control of current-mode Host clocks via IREF current
programming pin and ISEL_0:1 current multiplier pins
• Optional APIC clocks enabled via APICON input
(see Table 5 for Pins 21-23 configuration)
• Host clock frequency selection via the SEL_A,
SEL_B, and SEL133/100# pins
• Active-low PWR_DWN# signal allows one complete
clock cycle on each clock outputs and then shuts
down the crystal oscillator, PLL, and disables outputs
• Spread-spectrum modulation (-0.5% at 31.5kHz) of
Host, Memory, APIC, and 66MHz Reference clocks,
enabled via SS_EN# input
• Supports test mode and tristate output control to fa-
cilitate board testing
• Available in a 48-pin SSOP and TSSOP
Table 1: Clock Parameters
CLOCK
GROUP
#
PINS
SUPPLY
VOLTAGE
SUPPLY
GROUP
FREQ.
(MHz)
PHASE
SKEW
(MAX)
HOST_P 6
HOST_N 6
MREF_P 1
MREF_N 1
66REF
1
14REF
1
APIC
(optional)
3
3.3V
3.3V
3.3V
3.3V
1.8V
VDD_H
133.33
100.00
VDD_M
VDD_66
VDD_R
66.67
50.00
66.67
14.318
VDD_A 33.33
0°
180°
0°
180°
0°
0°
0°
100ps
Pair to
Pair
-
-
-
-
Figure 1: Block Diagram
XIN
XOUT
ISEL_0:1
Crystal
Oscillator
adjust
IREF
PWR_DWN#
SS_EN#
SEL133/100#
SEL_A:B
APICON
PLL
Control
FS6158
÷1
÷2
÷3
÷4
÷4
÷6
÷8
VDD_R
14REF
VSS_R
VDD_H
HOST_P1:6
HOST_N1:6
VSS_H
VDD_66
66REF
VSS_66
VDD_M
MREF_P
MREF_N
VSS_M
VDD_A
APIC_0:2
VSS_A
optional
Figure 2: Pin Configuration
VSS_R 1
14REF 2
VDD_R 3
XIN 4
XOUT 5
VSS_R 6
VDD_M 7
MREF_P 8
MREF_N 9
VSS_M 10
VDD 11
VSS 12
VDD_66 13
66REF 14
VSS_66 15
SEL133/100# 16
ISEL_0 17
ISEL_1 18
VDD_A 19
VSS_A 20
SEL_A / APIC_0 21
SEL_B / APIC_1 22
SS_EN# / APIC_2 23
PWR_DWN# 24
48 VDD_R
47 VSS / APICON
46 VDD_H
45 HOST_P1
44 HOST_N1
43 VSS_H
42 HOST_P2
41 HOST_N2
40 VDD_H
39 HOST_P3
38 HOST_N3
37 VSS_H
36 HOST_P4
35 HOST_N4
34 VDD_H
33 HOST_P5
32 HOST_N5
31 VSS_H
30 HOST_P6
29 HOST_N6
28 VDD_H
27 IREF
26 VSS_I
25 VDD_I
Intel and Pentium are registered trademarks of Intel Corporation. Lexmark is a trademark of Lexmark International, Inc. Non-linear spread spectrum modulation profile is licensed under US Patent
No. 5488627, Lexmark International, Inc. This document contains information on a preproduction product. Specifications and information herein are subject to change without notice.
ISO9001
2.26.02
IntWBY
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