Editing SATA (section)

=== SATA Power connectors <span class="anchor" id="SATA power"></span> ===

==== Standard power connector (15 pins) ====
{| class="wikitable" style="float:right; margin-left:1em; margin-right:0; margin-top:0;"
|+ Standard connector, power segment
|-
! colspan="2"| Pin # !! Mating !! Function
|-
| colspan="3" style="text-align:center;"|&nbsp;— || Coding notch
|-
| rowspan=3 style="background:orange;" |
| 1
| align=right| 3rd
| rowspan=2| 3.3&nbsp;V power
|-
| 2 ||align=right| 3rd
|-
| 3 ||align=center| 2nd
| Enter/exit Power Disable (PWDIS) mode<br />(3.3&nbsp;V power, pre-charge prior to SATA 3.3)
|-
| rowspan=3 style="background:black;" |
| 4
| align=left| 1st
| rowspan=3| Ground
|-
| 5 ||align=center| 2nd
|-
| 6 ||align=center |2nd
|-
|rowspan=3 style="background:red;" |
| 7
|align=center| 2nd
| 5&nbsp;V power, pre-charge
|-
| 8 ||align=right| 3rd
|rowspan=2| 5&nbsp;V power
|-
| 9 ||align=right| 3rd
|-
| style="background:black;" |
| 10
|align=center| 2nd
| Ground
|-
| style="background:gray;" |
| 11
|align=right |3rd
| [[Staggered spinup]] / activity signal /<br /> direct head unload / vendor specific
|-
| style="background:black;" |
| 12
| 1st
| Ground
|-
|rowspan=3 style="background:yellow;" |
| 13
|align=center| 2nd
| 12&nbsp;V power, pre-charge
|-
| 14 ||align=right| 3rd
|rowspan=2| 12&nbsp;V power
|-
| 15 ||align=right| 3rd
|}

[[File:SATA power cable.jpg|thumb|left|200px|A fifteen-pin SATA power connector (This particular connector is missing the orange 3.3&nbsp;V wire.)]]

SATA specifies a different [[DC connector|power connector]] than the four-pin [[Molex connector]] used on [[Parallel ATA]] (PATA) devices (and earlier small storage devices, going back to [[ST-506]] hard disk drives and even to floppy disk drives that predated the IBM PC). It is a wafer-type connector, like the SATA data connector, but much wider (fifteen pins versus seven) to avoid confusion between the two. Some early SATA drives included the four-pin Molex power connector together with the new fifteen-pin connector, but most SATA drives now have only the latter.

The new SATA power connector contains many more pins for several reasons:<ref name="allpinouts-sata">
{{cite web
 |url=http://www.allpinouts.org/index.php/Serial_ATA_%28SATA,_Serial_Advanced_Technology_Attachment%29 
 |archive-url=https://web.archive.org/web/20081108043955/http://www.allpinouts.org/index.php/Serial_ATA_%28SATA%2C_Serial_Advanced_Technology_Attachment%29 
 |title=Serial ATA (SATA, Serial Advanced Technology Attachment) 
 |access-date=2016-07-05 
 |archive-date=2008-11-08 
 |website=allpinouts.org 
 |url-status=dead 
}}</ref>
* 3.3&nbsp;V is supplied along with the traditional 5&nbsp;V and 12&nbsp;V supplies. However, very few drives actually use it.
* Pin 3 in SATA revision 3.3 has been redefined as PWDIS and is used to enter and exit the POWER DISABLE mode in line with SAS-3.<ref>{{cite web |last1=Chu |first1=Frank (HGST) |last2=Frank |first2=James (Seagate) |last3=Cox |first3=Alvin (Seagate) |title=SATA3.2 TPR056 Enable new Power Disable feature on standard SATA connector P3 |url=https://sata-io.org/sites/default/files/TPR056r13_SATA32_EnableNewPowerDisableFeatureOnStandardSATA.pdf |access-date=17 June 2023 |date=3 March 2014}}</ref> If Pin 3 is driven HIGH (2.1–3.6&nbsp;V max), power to the drive circuitry is cut. Drives with this feature enabled do not power up in systems designed to SATA revision 3.1 or earlier, because Pin 3 driven HIGH prevents the drive from powering up.<ref name="power-disable" /> Workarounds include using a Molex adapter without 3.3&nbsp;V or putting insulating tape over the PWDIS pin. 
* To reduce resistance and increase current capability, each voltage is supplied by three pins in parallel, though one pin in each group is intended for precharging (see below). Each pin should be able to carry 1.5&nbsp;A.
* Five parallel pins provide a low-resistance ground connection.
* Two ground pins and one pin for each supplied [[voltage]] support [[hot swapping|hot-plug]] precharging. Ground pins 4 and 12 in a hot-swap cable are the longest, so they make contact first when the connectors are mated. Drive power connector pins 3, 7, and 13 are longer than the others, so they make contact next. The drive uses them to charge its internal bypass capacitors through current-limiting resistances. Finally, the remaining power pins make contact, bypassing the resistances and providing a low-resistance source of each voltage. This two-step mating process avoids glitches to other loads and possible arcing or erosion of the SATA power-connector contacts. 
* Pin 11 might be used (often by chassis or backplane hardware independent from SATA host controller and its data connection) for [[staggered spinup]], activity indication, emergency head parking, or other vendor defined functions in various combinations. It is an [[open-collector]] signal, which may be pulled down by the connector or the drive.
** Host signaling: If pulled down at the connector (as it is on most cable-style SATA power connectors), the drive spins up as soon as power is applied. If left floating, the drive waits until it is spoken to. This prevents many drives from spinning up simultaneously, which might draw too much power.
** Drive signaling: The pin is also pulled low by the drive to indicate drive activity. This may be used to give feedback to the user through an [[LED]]. Relevant definitions of pin operation have changed multiple times in published revisions of SATA standard, so the observed behavior may be dependent on device version, host version, firmware and software configuration.<ref>{{cite web |author1=Samsung Electronics |title=Device Activity Signal (DAS) Application Note |url=https://semiconductor.samsung.com/resources/others/Samsung_SSD_845DC_01_Device_Activity_Signal_DAS.pdf |access-date=27 April 2023 |date=26 May 2014}}</ref><ref>{{cite web |author1=SATA-IO |title=Serial ATA Revision 3.2 Technical Proposal #058: DAS/DSS/DHU Changes |url=https://sata-io.org/sites/default/files/TPR058v3_SATA32_DAS%2BDSS%2BDHU_Changes.pdf |access-date=27 April 2023 |date=2 June 2014}}</ref><ref>{{cite web |author1=SATA-IO |title=Serial ATA Revision 3.2 Error Correction #089: DAS/DSS support clarifications |url=https://sata-io.org/sites/default/files/ECN089v6_SATA32_DSS_DAS_SupportClarifications.pdf |access-date=27 April 2023 |date=11 August 2015}}</ref> There is also a specification for transmission of drive temperature and other status values with activity signal pulses routinely used to make LED blink.<ref>{{cite web |author1=SNIA SFF TWG |title=SFF-8609: Management Interface for Drive Conditions |url=https://members.snia.org/document/dl/27389 |access-date=27 April 2023 |date=7 July 2017}}</ref>

Passive adapters are available that convert a four-pin [[Molex connector]] to a SATA power connector, providing the 5&nbsp;V and 12&nbsp;V lines available on the Molex connector, but not 3.3&nbsp;V. There are also four-pin Molex-to-SATA power adapters that include electronics to additionally provide the 3.3&nbsp;V power supply.<ref>[http://www.akasa.com.tw/update.php?tpl=product/product.detail.tpl&no=181&type=Cables&type_sub=SATA%20Cable%20Adapters&model=SATA2-20-PW Example of active power adapter] {{webarchive|url=https://web.archive.org/web/20170712125222/http://www.akasa.com.tw/update.php?tpl=product%2Fproduct.detail.tpl&no=181&type=Cables&type_sub=SATA%20Cable%20Adapters&model=SATA2-20-PW |date=2017-07-12 }}.</ref> However, most drives do not require the 3.3&nbsp;V power line.<ref>{{cite web |url=http://pinouts.ru/Power/sata-power_pinout.shtml |title=Serial ATA (SATA) power connector pinout and connections @ |website=pinouts.ru |date=2013-05-31 |access-date=2013-06-14 |url-status=live |archive-url=https://web.archive.org/web/20130628184420/http://pinouts.ru/Power/sata-power_pinout.shtml |archive-date=2013-06-28 }}</ref>

Just like SATA data connectors, SATA power connectors may be straight, upward-angled, or downward-angled. 
{{Clear}}

==== Slimline power connector (6 pins) ====
{| class="wikitable" style="float:right; margin-left:1em; margin-right:0; margin-top:0;"
|+ Slimline connector, power segment
|-
! colspan="2"| Pin # !! Mating !! Function
|-
| colspan="3" style="text-align:center;"| &nbsp;—
| Coding notch
|-
| style="background:gray;" |
| 1
|align=right| 3rd
| Device presence
|-
| style="background:red;" |
| 2
|align=center| 2nd
|rowspan=2| 5&nbsp;V power
|-
| style="background:red;" |
| 3
| align="center" | 2nd
|-
| style="background:gray;" |
| 4
|align=center| 2nd
| Manufacturing diagnostic
|-
| style="background:black;" |
| 5
|align=left| 1st
|rowspan=2| Ground
|-
| style="background:black;" |
| 6
|align=left| 1st
|}

<gallery widths="200">
SATA Slimline Powercable.jpg|A six-pin slimline SATA '''power''' connector
SATA connector Slimline CD-ROM.jpg|The back of a SATA-based slimline optical drive
</gallery>The power connector is reduced to six pins so it supplies only +5&nbsp;V (red wire), and not +12&nbsp;V or +3.3&nbsp;V.<ref name="sata26" /><ref>{{cite web |title=Press release: SATA-IO ADVANCES TECHNOLOGY WITH THE SATA REVISION 2.6 SPEC |url=https://sata-io.org/system/files/member-downloads/SATA-IOAdvancesTechnologyWithTheSATARevision2.6Spec.pdf |url-status=live |archive-url=https://web.archive.org/web/20170829210356/https://www.sata-io.org/system/files/member-downloads/SATA-IOAdvancesTechnologyWithTheSATARevision2.6Spec.pdf |archive-date=2017-08-29 |access-date=2017-11-10 |publisher=SATA}}</ref>

Pin 1 of the slimline power connector, denoting device presence, is shorter than the others to allow hot-swapping.

Note: The '''data''' connector used is the same as the non-slimline  version.

Low-cost adapters exist to convert from standard SATA to slimline SATA.

SATA&nbsp;2.6 is the first revision that defined the '''slimline''' power connector targeted for smaller form-factors drives, such as laptop [[Optical disc drive|optical drives]].

{{Clear}}

==== Micro connector ====
{| class="wikitable" style="float:right; margin-left:1em; margin-right:0; margin-top:0;"
|+ Micro connector, power segment
|-
! colspan="2" | Pin # !! Mating !! Function
<!-- The spec says that hot plugging isn't supported for micro cables, so mating is only important for backplane use. -->
|-
| style="background:orange;" |
| 1
| align=right | 3rd
| rowspan=2 | 3.3&nbsp;V power
|-
| style="background:orange;" |
| 2
| align=center | 2nd
|-
| style="background:black;" |
| 3
| align=left | 1st
| rowspan=2 | Ground
|-
| style="background:black;" |
| 4
|align=left| 1st
|-
| style="background:red;" |
| 5
|align=center| 2nd
|rowspan=2| 5&nbsp;V power
|-
| style="background:red;" |
| 6
|align=right| 3rd
|-
| style="background:gray;" |
| 7
|align=right| 3rd
| Reserved
|-
| colspan="3" style="text-align:center;"| &nbsp;—
| Coding notch
|-
| style="background:gray;" |
| 8
|align=right| 3rd
|rowspan=2| Vendor specific
|-
| style="background:gray;" |
| 9
|align=center| 2nd
|}
<gallery widths="200">
Micro SATA pin-out on Toshiba MK1216GSG 20131114.png|A 1.8-inch<!-- No unit conversion: this is a nominal size class and not a measurement. --> micro SATA hard drive with numbered data and power pins on the connector
2008 Intel Developer Forum Taipei Showcae Samsung muSATA 128GB SSD.jpg|[[Samsung]] 128 GB micro SATA [[solid-state drive]]
</gallery>

The micro SATA connector (sometimes called uSATA or μSATA<ref name="amazon-msata">{{cite web
 | url = https://www.amazon.com/gp/richpub/syltguides/fullview/RBX0KM9DMNFEJ
 | archive-url = https://web.archive.org/web/20130802043631/http://www.amazon.com/gp/richpub/syltguides/fullview/RBX0KM9DMNFEJ
 | title = Understand the difference: micro-SATA vs. mSATA
 | date = 2013-02-23 | access-date = 2013-11-06 | archive-date = 2013-08-02
 | website = amazon.com
}}</ref>) originated with SATA&nbsp;2.6, and is intended for 1.8-inch<!-- No unit conversion: this is a nominal size class and not a measurement. --> hard disk drives. There is also a micro data connector, similar in appearance but slightly thinner than the standard data connector.

{{Clear}}