Editing PIC microcontrollers (section)

==Clones==

===Parallax===
{{Main article|Parallax SX}}
[[Parallax, Inc. (company)|Parallax]] produced a series of PICmicro-like microcontrollers known as the [[Parallax SX]]. It is currently discontinued. Designed to be architecturally similar to the PIC microcontrollers used in the original versions of the [[BASIC Stamp]], SX microcontrollers replaced the PIC in several subsequent versions of that product.

Parallax's SX are 8-bit RISC microcontrollers, using a 12-bit instruction word, which run fast at 75&nbsp;MHz (75 MIPS). They include up to 4096 12-bit words of [[flash memory]] and up to 262 bytes of [[random access memory]], an eight bit counter and other support logic. There are software library modules to emulate [[I²C]] and [[Serial Peripheral Interface Bus|SPI]] interfaces, UARTs, frequency generators, measurement counters and [[Pulse-width modulation|PWM]] and sigma-delta A/D converters. Other interfaces are relatively easy to write, and existing modules can be modified to get new features.

===PKK Milandr===
[[File:Microchip Milandr.jpg|thumb|1886VE2U]]
[[Russia]]n PKK Milandr produces microcontrollers using the [[#PIC17|PIC17]] architecture as the 1886 series.<ref>{{cite web
| title=Milandr K1886VE: The PIC That Went to Russia
| publisher=The CPU Shack
| url=http://www.cpushack.com/2016/03/10/milandr-k1886ve-the-pic-that-went-to-russia/
| date=10 March 2016
| access-date=21 July 2016
}}</ref>
<ref>{{cite web
| title=Высокопроизводительные 8-ми разрядные КМОП микроконтроллеры 1886ВЕ1 и 1886ВЕ2. Перечень отличий от ближайшего функционального аналога PIC17C756A.
| trans-title=High-performance 8-bit CMOS microcontrollers 1886VE1 and 1886VE2. List of differences from the nearest functional analog PIC17C756A.
| publisher=PKK Milandr
| place=Moscow
| url=http://www.milandr.ru/uploads/Products/product_24/spec_1886BE2(BE1)_otlichiya_PIC17C756A.pdf
| archive-url=https://web.archive.org/web/20170205074616/http://www.milandr.ru/uploads/Products/product_24/spec_1886BE2(BE1)_otlichiya_PIC17C756A.pdf
| archive-date=5 February 2017
| language=ru
| date=7 September 2006
| access-date=23 October 2017
}}</ref>
<ref name=milandr1886>{{cite web
| title=Каталог продукции группы компаний "Миландр" 2017
| trans-title=Product catalog of the Milandr Group 2017
| publisher=PKK Milandr
| place=Moscow
| url= http://www.milandr.ru/upload/iblock/fa0/fa022494a4d32d329ffc0c93f61b5d47.pdf
| language=ru
| archive-url=https://web.archive.org/web/20171027075514/http://www.milandr.ru/upload/iblock/fa0/fa022494a4d32d329ffc0c93f61b5d47.pdf
| archive-date=27 October 2017
| access-date=18 April 2018
}}</ref>
<ref name=museum1886>{{cite web
| title=1886ая серия
| trans-title=1886 series
| url=http://www.155la3.ru/k1886.htm
| language=ru
| access-date=21 July 2016
}}</ref>
Program memory consists of up to 64kB Flash memory in the 1886VE2U ({{langx|ru|1886ВЕ2У|italic=yes}}) or 8kB EEPROM in the 1886VE5U (''1886ВЕ5У''). The 1886VE5U (''1886ВЕ5У'') through 1886VE7U (''1886ВЕ7У'') are specified for the military temperature range of -60&nbsp;°C to +125&nbsp;°C. Hardware interfaces in the various parts include USB, CAN, I2C, SPI, as well as A/D and D/A converters. The 1886VE3U (''1886ВЕ3У'') contains a hardware accelerator for cryptographic functions according to [[GOST 28147-89]]. There are even [[Radiation hardening|radiation-hardened]] chips with the [[Soviet integrated circuit designation|designations]] 1886VE8U (''1886ВЕ8У'') and 1886VE10U (''1886ВЕ10У'').<ref>{{cite web
| title=Part II: How to "open" microchip and what's inside? Z80, Multiclet, MSP430, PIC and more
| publisher=ZeptoBars
| url=https://zeptobars.com/en/read/open-microchip-asic-what-inside-II-msp430-pic-z80
| date=21 February 2013
| access-date=11 April 2017
}}</ref>

===ELAN Microelectronics===
{{Further|PIC instruction listings#ELAN Microelectronics clones (13 or 15 bit)}}
ELAN Microelectronics Corp. in Taiwan make a line of microcontrollers based on the PIC16 architecture, with 13-bit instructions and a smaller (6-bit) RAM address space.<ref>{{Cite web|url=http://www.emc.com.tw/eng/products.asp|title = 義隆電子股份有限公司義隆電子，再創未來！}}</ref>

===Holtek Semiconductor===
{{Further|PIC instruction listings#Holtek clones (14 or 16 bit)}}
[[Holtek|Holtek Semiconductor]] make a large number of very cheap microcontrollers<ref>{{cite web
 |title=Holtek HT-66
 |work=The Amazing $1 Microcontroller
 |first=Jay |last=Carlson
 |url=https://jaycarlson.net/pf/holtek-ht-66/
 |date=15 September 2017
 |access-date=8 July 2019
}}</ref> (as low as 8.5 ''cents'' in quantity<ref>{{cite web
 |title=What's the Cheapest MCU? My Try: Holtek HT48R002 8-bit MCU Selling for $0.085
 |first=Jean-Luc |last=Aufranc
 |date=3 August 2016
 |access-date=8 July 2019
 |work=CNX Software blog
 |url=https://www.cnx-software.com/2016/08/03/whats-the-cheapest-mcu-my-try-holtek-ht48r002-8-bit-mcu-selling-for-0-085/
}}</ref>) with a 14-bit instruction set strikingly similar to the PIC16.

===Hycon===
{{Further|PIC instruction listings#Hycon clones (16 bit)}}
[[Hycon Technology]], a Taiwanese manufacturer of [[mixed-signal]] chips for portable electronics ([[multimeter]]s, [[kitchen scale]]s, etc.), has a proprietary H08 microcontroller series with a 16-bit instruction word very similar to the PIC18 family.  (No relation to the [[H8 Family|Hitachi/Renesas H8 microcontrollers]].)  The H08A<ref>{{cite web |url=https://www.hycontek.com/wp-content/uploads/APD-CORE002_EN.pdf |title=Instruction Set H08A User’s Manual |date=1 August 2010 |publisher=Hycon Technology Corp. |id=APD-CORE002-V03_EN |accessdate=2025-01-04}}</ref> is most like the PIC18; the H08B<ref>{{cite web |url=https://www.hycontek.com/hy_mcu/APD-CORE003_EN.pdf |title=Instruction Set H08B User’s Manual |date=1 August 2010 |publisher=Hycon Technology Corp. |id=APD-CORE003-V02_EN |accessdate=2016-08-19}}</ref> is a subset.<ref>{{cite web |url=https://www.hycontek.com/hy_mcu/APD-CORE001_EN.pdf#page=3 |title=CPU Core Application Description: Comparisons and Supplements of Instruction Set H08A and H08B |date=24 March 2011 |publisher=Hycon Technology Corp. |id=APD-CORE001_EN-V06}}</ref>
	
Although the available instructions are almost identical, their ''encoding'' is different, as is the memory map and peripherals.  For example, the PIC18 allows direct access to RAM at 0x000–0x07F or special function registers at 0xF80–0xFFF by sign-extending an 8-bit address.  The H08 places special function registers at 0x000–0x07F and global RAM at 0x080–0x0FF, zero-extending the address.

===Other manufacturers in Asia===
Many ultra-low-cost [[One-time programmable|OTP]] microcontrollers from Asian manufacturers, found in low-cost consumer electronics are based on the PIC architecture or modified form. Most clones only target the baseline parts (PIC16C5x/PIC12C50x). With any patents on the basic architecture long since expired, Microchip has attempted to sue some manufacturers on copyright grounds,<ref>{{cite press release
|url=http://ww1.microchip.com/downloads/pr_archive/en/en013345.pdf
|title=Microchip Technology files copyright infringement suit against MICON Design Technology CO. LTD.
|date=29 January 1999
|access-date=23 October 2017
}}</ref><ref>{{cite press release
|url=http://ww1.microchip.com/downloads/pr_archive/en/en531033.pdf
|title=Microchip Technology takes legal action against Shanghai Haier Integrated Circuit
|date=5 July 2007
|access-date=23 October 2017
}}</ref>
without success.<ref>{{cite news
 |title=Fight Chinese Counterfeiting? Forget It
 |first=Brian |last=Fuller
 |date=1 May 2013
 |journal=Electronics Business News
 |url=https://epsnews.com/2013/05/01/fight-chinese-counterfeiting-forget-it/
 |access-date=2024-01-04
}}</ref><ref>{{cite web
 |title=Haier Integrated chip to win the patent battle against US microchip
 |date=18 May 2015
 |access-date=8 July 2019
 |website=sb2a0 electronic components
 |type=blog
 |url=http://sb2a0.weebly.com/blog/haier-integrated-chip-to-win-the-patent-battle-against-us-microchip
}}</ref>{{Better source needed|reason=Citation is an anonymous chinglish blog. Unfortunately, failed lawsuits tend to sink without a trace, but the absence of a press release by Microchip claiming victory corroborates this.|date=July 2019}}