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In computing, serial presence detect (SPD) is a standardized way to automatically access information about a memory module. Earlier 72-pin SIMMs included five pins that provided five bits of parallel presence detect (PPD) data, but the 168-pin DIMM standard changed to a serial presence detect to encode much more information.

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  • Serial Presence Detect (de)
  • Serial Presence Detect (es)
  • Serial Presence Detect (it)
  • Serial Presence Detect (pl)
  • Serial presence detect (en)
  • 串行存在检测 (zh)
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  • Serial Presence Detect (SPD) es un proceso estandarizado de acceso automático a información de un módulo en la memoria RAM. Esta es la versión con comunicación serial. Existe una contraparte (menos utilizada) con comunicación en paralelo, llamada en inglés "Parallel Presence Detect" (PPD). (es)
  • 串行存在检测(英語:serial presence detect,缩写SPD)是一种访问内存模块有关信息的标准化方式。 早期的72 pin SIMM包括五个引脚,提供5位元并行存在检测(PPD)数据,而168 pin DIMM标准更改为串行存在检测,以编码更多信息。 在普通的现代電腦开机时,它将进行一次加电自检(POST)。自从20世纪90年代中期以来,这个过程包括自动設定当前存在的硬件。SPD是一项内存硬件特性,可使電腦了解存在的内存以及访问内存要使用的时序。 部分電腦可以完全自动地適應硬件变更。在大多数情况下,有一个特殊的可选步骤可以访问BIOS参数,得以查看并可能更改相关設定。有些電腦可以控制如何使用SPD中存储的数据——可以选择性的修改内存时序,乃至完全覆盖(忽视)SPD数据,詳見超頻。 (zh)
  • Serial Presence Detect (SPD) ist ein Verfahren zum automatischen Konfigurieren von Speichermodulen in Computersystemen (vorwiegend in Personal Computern). Typischerweise werden die für das Speichermodul relevanten Informationen (Speicherkapazität, Versorgungsspannung, Timing, Anforderungen für den Refresh, Latenz usw.) auf einem separaten Festwertspeicher (seriellen EEPROM-Baustein) gespeichert. Die dort gespeicherten Informationen umfassen zwischen 128 und 256 Bytes. (de)
  • In computing, serial presence detect (SPD) is a standardized way to automatically access information about a memory module. Earlier 72-pin SIMMs included five pins that provided five bits of parallel presence detect (PPD) data, but the 168-pin DIMM standard changed to a serial presence detect to encode much more information. (en)
  • Il Serial Presence Detect (SPD) è una funzione utilizzata nei personal computer, per supportare la configurazione automatica dei banchi di memoria RAM installati. La funzione SPD è implementata tramite uno specifico chip (una EEPROM di 1024 bit o, più spesso, di 2048 bit) aggiunto dal costruttore nei moduli di memoria RAM (p.e. i DIMM). In tale chip, secondo una codifica precisamente specificata, sono raccolti i dati dei vari parametri necessari al buon funzionamento di quel modulo di memoria (per esempio, il voltaggio d'alimentazione e la frequenza di clock). All'avvio del computer, durante l'iniziale fase del POST, tali dati possono essere letti dal BIOS per automatizzare la configurazione del sistema, permettendo la gestione ottimale della memoria installata e la successiva stabilità op (it)
  • Serial presence detect (SPD) – standaryzowany sposób na dostęp do danych określających parametry modułów pamięci RAM. Wcześniejsze 72-pinowe moduły SIMM używały pięciu pinów do zakodowania ustawień modułu (PPD, Parallel presence detect), w nowych 168-pinowych modułach DIMM zastosowano do tego celu kość pamięci szeregowej, mogącą pomieścić znacznie więcej informacji na temat danego modułu. (pl)
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