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GS8182S08 Scheda tecnica(PDF) 6 Page - GSI Technology |
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GS8182S08 Scheda tecnica(HTML) 6 Page - GSI Technology |
6 / 36 page Pin Description Table Symbol Description Type Comments SA Synchronous Address Inputs Input — R/W Read/Write Contol Pin Input Write Active Low; Read Active High NW0–NW1 Synchronous Nybble Writes Input Active Low x08 Only BW Synchronous Byte Writes Input Active Low x09 Only BW0–BW3 Synchronous Byte Writes Input Active Low x18/x36 Only K Input Clock Input Active High C Output Clock Input Active High TMS Test Mode Select Input — TDI Test Data Input Input — TCK Test Clock Input Input — TDO Test Data Output Output — VREF HSTL Input Reference Voltage Input — ZQ Output Impedance Matching Input Input — K Input Clock Input Active Low C Output Clock Output Active Low DOFF DLL Disable — Active Low LD Synchronous Load Pin — Active Low CQ Output Echo Clock Output Active Low CQ Output Echo Clock Output Active High Dn Synchronous Data Inputs Input — Qn Synchronous Data Outputs Output — VDD Power Supply Supply 1.8 V Nominal VDDQ Isolated Output Buffer Supply Supply 1.8 or 1.5 V Nominal VSS Power Supply: Ground Supply — NC No Connect — — Notes: 1. C, C, K, or K cannot be set to VREF voltage. 2. When ZQ pin is directly connected to VDD, output impedance is set to minimum value and it cannot be connected to ground or left unconnected. 3. NC = Not Connected to die or any other pin. GS8182S08/09/18/36BD-400/375/333/300/250/200/167 Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com. Rev: 1.03c 11/2011 6/36 © 2007, GSI Technology Background Separate I/O SRAMs, like SigmaQuad SRAMs, are attractive in applications where alternating reads and writes are needed. On the other hand, Common I/O SRAMs like the SigmaCIO family are popular in applications where bursts of read or write traffic are needed. The SigmaSIO SRAM is a hybrid of these two devices. Like the SigmaQuad family devices, the SigmaSIO features a separate I/O data path, offering the user independent Data In and Data Out pins. However, the SigmaSIO devices offer a control |
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