AME AT123SG

AME, Inc.
AT123S
PCI Arbiter
n General Description
n Features
AT123S is a PCI arbiter. It allows users to extend system PCI devices or slots without piecing additional circuit to simply design complexity and increase system
stability. AT123S also provides STOP# input pin with
that extended PCI devices is able to instruct the PCI
master to prematurely end the transaction on the current
data phase same as one defined in PCI specification.
l PCI Arbiter
Extend PCI Devices from One to Three
l PCI Clock Frequency
Support PCI Clock range from 25MHz to
66MHz
l All AME's Lead Free Products Meet RoHS
Standards
n Pin Configuration
SYSREQ #
1
16
STOP#
SYSGNT #
2
15
VCC
PCIREQ1#
3
14
PCICLKi
VSS
4
13
PCIRESET#
PCIGNT1#
5
12
VSS
PCIREQ2#
6
11
VCC
VCC
7
10
PCIGNT3#
PCIGNT2#
8
9
PCIREQ3#
A
T
1
2
3
S
※ Ordering Information
AT123S- Commercial Standard
AT123SG- Green Device with Commercial Standard
Rev.A.01
1
AME, Inc.
AT123S
PCI Arbiter
n Pin Description
I/O Type
Function
INt
TTL level input
PP12
Push pull output with 12mA sink current
PWR
Power Pin
Pin No.
Pin Name
I/O Type
Function
1
SYSREQ#
PP12
Request signal to chipset
2
SYSGNT#
INt
Grant signal from chipset
3
PCIREQ1#
INt
Request signal from PCI bus (Internal 5K pull-up resistor)
5
PCIGNT1#
PP12
6
PCIREQ2#
INt
8
PCIGNT2#
PP12
9
PCIREQ3#
INt
10
PCIGNT3#
PP12
13
PCIRESET#
INt
PCI bus reset#
14
PCICLKi
INt
PCICLK input reference frequency
16
STOP#
INt
PCI bus stop#
4
VSS
PWR
Ground
7
VCC
PWR
3.3V Power
11
VCC
PWR
3.3V Power
12
VSS
PWR
Ground
15
VCC
PWR
3.3V Power
Grant signal to PCI bus
Request signal from PCI bus (Internal 5K pull-up resistor)
Grant signal to PCI bus
Request signal from PCI bus (Internal 5K pull-up resistor)
Grant signal to PCI bus
Table 1. PCI Arbiter FSM Group Signal
2
Rev.A.01
AME, Inc.
AT123S
PCI Arbiter
n Quick Reference Data
GND = 0V; VCC = 3.3V; 0oC < Temp. < 85oC
Symbol
Parameter
VCC
Power pin
VSS
Ground pin
Test Conditions
Min
Typical
3.15
3.3
Max
Unit
V
3.45
0
V
Table 2. Power/Ground Pin
Symbol
Parameter
Vil
Input low voltage
Vih
Input high voltage
Vol
Output low voltage
Voh
Output high voltage
Tdcko
Output delay from
PCICLK rising edge to
output valid
PCICLKI
Buffer input frequency
Test Conditions
Min
Typical
Max
Unit
0.8
V
2
V
0.4
2.4
nS
8
25M
V
10
nS
66M
Hz
Table 3. PCI Arbiter FSM
Rev.A.01
3
AME, Inc.
AT123S
PCI Arbiter
n Package Dimension
SOP-16
TOP VIEW
16
SYMBOLS
9
H
E
8
1
b
e
MILLIMETERS
INCHES
MIN
MAX
MIN
MAX
A
1.35
1.75
0.053
0.069
A1
0.10
0.25
0.004
0.010
b
0.40TYP
0.018TYP
C
0.20TYP
0.008TYP
e
1.27TYP
0.050TYP
E
3.81
4.00
0.150
0.157
D
9.80
10.00
0.386
0.394
h
0.38TYP
0.015TYP
FRONT VIEW
H
5.80
6.20
0.228
0.244
D
L
0.41
1.27
0.016
0.050
θ
0o
8o
0o
8o
A
SEATING PLANE
0.004 max
A1
SIDE VIEW
h
A"
0'
DETAL : A"
L
C
4
Rev.A.01
www.ame.com.tw
E-Mail: sales@ame.com.tw
Life Support Policy:
These products of AME, Inc. are not authorized for use as critical components in life-support
devices or systems, without the express written approval of the president
of AME, Inc.
AME, Inc. reserves the right to make changes in the circuitry and specifications of its devices and
advises its customers to obtain the latest version of relevant information.
 AME, Inc. , July 2007
Document: ATT-DSAT123S-A.01
Corporate Headquarter
U.S.A. (Subsidiary)
AME, Inc.
Analog Microelectronics, Inc.
2F, 302 Rui-Guang Road, Nei-Hu District
3100 De La Cruz Blvd., Suite 201
Taipei 114, Taiwan.
Tel : 886 2 2627-8687
Santa Clara, CA. 95054-2046
Tel: (408) 988-2388
Fax: 886 2 2659-2989
Fax: (408) 988-2489