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| AME, Inc. AT123S n General Description 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. PCI Arbiter n Features 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 # SYSGNT # PCIREQ1# VSS PCIGNT1# PCIREQ2# VCC PCIGNT2# 1 2 3 4 5 6 7 8 16 15 STOP# VCC PCICLKi PCIRESET# VSS VCC PCIGNT3# PCIREQ3# A T 1 2 3 S 14 13 12 11 10 9 Ordering Information AT123S- Commercial Standard AT123SG- Green Device with Commercial Standard Rev.A.01 1 AME, Inc. AT123S n Pin Description I/O Type INt PP12 PWR PCI Arbiter Function TTL level input Push pull output with 12mA sink current Power Pin Pin No. 1 2 3 5 6 8 9 10 13 14 16 4 7 11 12 15 Pin Name SYSREQ# SYSGNT# PCIREQ1# PCIGNT1# PCIREQ2# PCIGNT2# PCIREQ3# PCIGNT3# PCIRESET# PCICLKi STOP# VSS VCC VCC VSS VCC I/O Type PP12 INt INt PP12 INt PP12 INt PP12 INt INt INt PWR PWR PWR PWR PWR Function Request signal to chipset Grant signal from chipset 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 Request signal from PCI bus (Internal 5K pull-up resistor) Grant signal to PCI bus PCI bus reset# PCICLK input reference frequency PCI bus stop# Ground 3.3V Power 3.3V Power Ground 3.3V Power Table 1. PCI Arbiter FSM Group Signal 2 Rev.A.01 AME, Inc. AT123S n Quick Reference Data GND = 0V; VCC = 3.3V; 0oC < Temp. < 85oC PCI Arbiter Symbol VCC VSS Parameter Power pin Ground pin Test Conditions Min 3.15 3.45 Typical 3.3 Max Unit V 0 V Table 2. Power/Ground Pin Symbol Vil Vih Vol Voh Tdcko PCICLKI Parameter Input low voltage Input high voltage Output low voltage Output high voltage Output delay from PCICLK rising edge to output valid Buffer input frequency Test Conditions Min 2 Typical Max 0.8 Unit V V 0.4 2.4 8 25M 10 66M V nS nS Hz Table 3. PCI Arbiter FSM Rev.A.01 3 AME, Inc. AT123S n Package Dimension SOP-16 TOP VIEW 16 9 PCI Arbiter SYMBOLS A A1 b C 8 MILLIMETERS MIN 1.35 0.10 MAX 1.75 0.25 INCHES MIN 0.053 0.004 MAX 0.069 0.010 0.40TYP 0.20TYP 1.27TYP 3.81 9.80 5.80 0.41 0o 4.00 10.00 6.20 1.27 8o 0.018TYP 0.008TYP 0.050TYP 0.150 0.386 0.228 0.016 0o 0.157 0.394 0.244 0.050 8o E H e e 1 b E D h 0.38TYP 0.015TYP FRONT VIEW D H L A SEATING PLANE 0.004 max A1 SIDE VIEW h A" C 0' L DETAL : A" 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. (c) AME, Inc. , July 2007 Document: ATT-DSAT123S-A.01 Corporate Headquarter AME, Inc. 2F, 302 Rui-Guang Road, Nei-Hu District Taipei 114, Taiwan. Tel : 886 2 2627-8687 Fax: 886 2 2659-2989 U.S.A. (Subsidiary) Analog Microelectronics, Inc. 3100 De La Cruz Blvd., Suite 201 Santa Clara, CA. 95054-2046 Tel: (408) 988-2388 Fax: (408) 988-2489 |
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