Editing mediatek/helio/mt6797t

{{mediatek title|Helio X25 (MT6797T)}}
{{mpu
| name                = MediaTek Helio X25
| no image            = yes
| image               = 
| image size          = 
| caption             = 
| designer            = MediaTek
| designer 2          = ARM Holdings
| manufacturer        = TSMC
| model number        = Helio X25
| part number         = MT6797T
| part number 2       = MTK6797T
| market              = Mobile
| market 2            = Embedded
| first announced     = May 12, 2015
| first launched      = March 16, 2016
| last order          = 
| last shipment       = 
| release price       = 

| family              = Helio
| series              = Helio X
| locked              = 
| frequency           = 2,500 MHz
| frequency 2         = 1,850 MHz
| frequency 3         = 1,400 MHz
| bus type            = AMBA 4 AXI
| bus speed           = 
| bus rate            = 
| bus links           = 
| clock multiplier    =

| isa family          = ARM
| isa                 = ARMv8
| microarch           = Cortex-A53
| microarch 2         = Cortex-A72
| platform            = 
| chipset             = 
| core name           = Cortex-A53
| core name 2         = Cortex-A72
| core family         = 
| core model          = 
| core stepping       = 
| process             = 20 nm
| transistors         = 
| technology          = CMOS
| die area            = <!-- XX mm² -->
| die width           = 
| die length          = 
| word size           = 64 bit
| core count          = 10
| thread count        = 10
| max cpus            = 1
| max memory          = 

| electrical          = 
| power               = 
| v core              = 
| v core tolerance    = 
| v io                = 
| v io 2              = 
| v io 3              = 
| sdp                 = 
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| tdp typical         = 
| ctdp down           = 
| ctdp down frequency = 
| ctdp up             = 
| ctdp up frequency   = 
| temp min            = 
| temp max            = 
| tjunc min           = 
| tjunc max           = 
| tcase min           = 
| tcase max           = 
| tstorage min        = <!-- °C -->
| tstorage max        = 
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| packaging           = 
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}}
'''Helio X20''' ('''MT6797T''') is a {{arch|64}} [[deca-core]] [[ARM]] [[LTE]] system on a chip designed by [[MediaTek]] and introduced in early [[2016]]. This SoC incorporates 3 independent clusters of cores (called "Tri-Cluster" by MediaTek) operating at varying degrees of performance designed for certain workloads (operating at 1.4 GHz, 1.85 GHz, and 2.5 GHz) and supports dual-channel LPDDR3-933. This SoC also incorporates a {{armh|Mali-T800 MP4}} [[IGP]] operating at 850 MHz. The chip has a modem supporting [[LTE]] User Equipment (UE) category 6.

The Helio X25 is identical to {{\\|Helio X20}} except for the higher clocked {{armh|Cortex-A72|A72|l=arch}} cores and the higher clocked GPU.

== Architecture ==
The Helio X20 is designed is composed of 3 individual clusters of CPU cores depending on the level of performance required by the active applications.

* Extreme Performance - 2x {{armh|Cortex-A72|l=arch}} @ 2.5 GHz
* Performance/Power Balance - 4x {{armh|Cortex-A53|l=arch}} @ 1.85 GHz
* Power Efficiency - 4x {{armh|Cortex-A53|l=arch}} @ 1.4 GHz

The three clusters are designed as a modified {{armh|big.LITTLE}} configuration.

== Cache ==
{{main|arm holdings/microarchitectures/cortex-a53#Memory_Hierarchy|arm holdings/microarchitectures/cortex-a72#Memory_Hierarchy|l1=Cortex-A53 § Cache|l2=Cortex-A72 § Cache}}
{{empty section}}

== Memory controller ==
{{memory controller
|type=LPDDR3-933
|ecc=No
|max mem=4 GiB
|controllers=1
|channels=2
|max bandwidth=13.9 GiB/s
|bandwidth schan=6.95 GiB/s
|bandwidth dchan=13.9 GiB/s
}}

== Expansions ==
{{expansions
|usb revision=2.0
|usb revision 2=3.0
|usb ports=8
|uart=4
|gp io=Yes
}}

== Graphics ==
{{integrated graphics
| gpu                 = Mali-T880
| device id           = 
| designer            = ARM Holdings
| execution units     = 4
| max displays        = 
| max memory          = 
| frequency           = 780 MHz

| output dsi          = Yes

| max res dsi         = 2560x1600

| direct3d ver        = 11.2
| opencl ver          = 1.2
| opengl ver          = 3.2
| opengl es ver       = 3.2
| vulkan ver          = 1.0
| openvg ver          = 1.1
}}

== Wireless ==
{{wireless links
| wifi              = Yes
| 80211ac           = Yes

| 2g                = Yes
| csd               = Yes
| gsm               = Yes
| gprs              = Yes
| edge              = Yes
| cdmaone           = 
| is-95a            = 
| is-95b            = 
| 3g                = Yes
| cdma2000          = Yes
| cdma2000 1x       = Yes
| cdma2000 1xev-do  = Yes
| cdma2000 1x adv   = 
| umts              = Yes
| wcdma             =  
| td-scdma          = Yes
| dc-hsdpa          = Yes
| hsdpa             = 
| hsupa             = Yes
| 4g                = Yes
| lte a             = Yes
| e-utran           = Yes
| ue cat            = 6
}}

== Image ==
* Integrated image signal processor supports 32 MP
* Supports image stabilization
* Supports video stabilization
* Supports noise reduction
* Supports lens shading correction
* Supports AE/AWB/AF
* Supports edge enhancement
* Supports face detection and visual tracking
* Hardware JPEG encoder

== Video ==
* Video encoding 4K2K @ 30fps with H.265 and HDR
* Video decoding 4K2K @ 30fps, h.264, h.265 / HEVC, MPEG-1/2/4, VC-1, VP-8, VP-9

== Audio ==
* Audio content sampling rates 8kHz to 192kHz
* Audio content sampling format 8-bit/16-bit/24-bit Mono/Stereo
* I2S, PCM
* Encode: AMR-NB, AMR-WB, AAC, OGG, ADPCM
* Decode: WAV, MP3, MP2, AAC, AMR-NB, AMR-WB, MIDI, Vorbis, APE, AAC-plus v1, AAC-plus v2, FLAC, WMA, ADPCM
* 7.1 channel MHL output

== Utilizing devices ==
{{empty section}}
<!-- * [[used by::xxxxxxxxxxxxxxxxx]] -->
base frequency	2,500 MHz (2.5 GHz, 2,500,000 kHz) +, 2,000 MHz (2 GHz, 2,000,000 kHz) + and 1,550 MHz (1.55 GHz, 1,550,000 kHz) +
bus type	AMBA 4 AXI +
core count	10 +
core name	Cortex-A53 + and Cortex-A72 +
designer	ARM Holdings + and MediaTek +
family	Helio +
first announced	May 12, 2015 +
first launched	March 16, 2016 +
full page name	mediatek/helio/mt6797t +
has 2g support	true +
has 3g support	true +
has 4g support	true +
has cdma2000 1x support	true +
has cdma2000 1xev-do support	true +
has cdma2000 support	true +
has csd support	true +
has dc-hsdpa support	true +
has e-utran support	true +
has ecc memory support	false +
has edge support	true +
has gprs support	true +
has gsm support	true +
has hsupa support	true +
has lte advanced support	true +
has td-scdma support	true +
has umts support	true +
instance of	microprocessor +
integrated gpu	Mali-T880 +
integrated gpu base frequency	850 MHz (0.85 GHz, 850,000 KHz) +
integrated gpu designer	ARM Holdings +
integrated gpu execution units	4 +
isa	ARMv8 +
isa family	ARM +
ldate	March 16, 2016 +
manufacturer	TSMC +
market segment	Embedded + and Mobile +
max cpu count	1 +
max memory	6,144 MiB (6,291,456 KiB, 6,442,450,944 B, 6 GiB, 0.00586 TiB) +
max memory channels	2 +
microarchitecture	Cortex-A53 + and Cortex-A72 +
model number	Helio X25 +
name	MediaTek Helio X25 +
part number	MT6797T + and MTK6797T +
process	20 nm (0.02 μm, 2.0e-5 mm) +
series	Helio X +
smp max ways	1 +
supported memory type	LPDDR3-1600 +
technology	CMOS +
thread count	10 +
used by	BMXC S10 +, Brandt Bprime S +, Elephone P11 3D +, Elephone S7 +, Elephone S8 +, Elephone Soldier +, LeEco Le 2 X625 +, Meizu Pro 6 +, Meizu Pro 6S +, Planet Computers Gemini (early versions) + and Xiaomi Redmi Pro +
user equipment category	6 +
word size	64 bit (8 octets, 16 nibbles) +