ARM chip with LPC interface support - Page 1
Forum section: electronics / general

author: plazma
author_rank: Frequent Contributor
timestamp: July 14, 2016, 02:53:41 pm
content: I tried googling around but did not find any. Are there ARM or other microcontroller chips with LPC (Low Pin Count) interface support?

author: MosherIV
author_rank: Super Contributor
timestamp: July 14, 2016, 03:34:51 pm
content: HiIf by Low Pin Count you mean this :https://en.wikipedia.org/wiki/Low_Pin_CountI do not think so.I think you do not understand ARM target markets. Broadly speaking ARM now have 2 product family lines :Cortex ACortex MThe A series of processors are targeted towards high performance and low power eg smart phones and tabletsThe M series of processors are targeted towards single device embedded applications eg microwave oven and the like.Neither family would have a need to interface to LPC

author: Lukas
author_rank: Frequent Contributor
timestamp: July 15, 2016, 12:29:32 am
content: You'll have to look for "embedded controllers" (the ones used in laptops for keyboard scanning and power management)There are:http://www.microchip.com/wwwproducts/en/MEC1322Some more may include:https://chromium.googlesource.com/chromiumos/platform/ec/+/master/chip

author: MosherIV
author_rank: Super Contributor
timestamp: July 15, 2016, 11:37:42 am
content: QuoteI do not think you understood what the OP was asking.I think it was about ARM based microcontrollers that has support for a interface called "Low Pin Count interface"

author: nctnico
author_rank: Super Contributor
timestamp: July 15, 2016, 12:49:37 pm
content: I never heard of an LPC interface so maybe the OP could point towards a specification. It could also be a manufacturer specific name for a standard interface. Omnivision for example uses the term SCCB for I2C.

author: andersm
author_rank: Super Contributor
timestamp: July 15, 2016, 01:01:21 pm
content: Quote from: nctnico on July 15, 2016, 12:49:37 pmIt's specified byIntel, designed to move chipset peripherals off the ISA bus.

author: Jeroen3
author_rank: Super Contributor
timestamp: July 15, 2016, 01:06:48 pm
content: It's a legacy thing for people not yet ready to bring ISA bus to the grave it seems.A quick search in the digikey database shows that only Renesas and Atmel have LPCI capable microcontrollers.None carry a Cortex M, only 8051, AVR and some proprietary renesas thing called H8S/2600. Limited options.Maybe a Cortex M1?

author: andersm
author_rank: Super Contributor
timestamp: July 15, 2016, 01:12:23 pm
content: Not ARM, but Microchip'sMEC14xxseries uses a MIPS core similar to the PIC32s.

author: nctnico
author_rank: Super Contributor
timestamp: July 15, 2016, 02:16:26 pm
content: Maybe a 4 bit SD interface can be tricked into providing a similar bus timings but then again I don't know how much needs to be handled in the hardware in order to meet timing requirements.

author: kc8apf
author_rank: Regular Contributor
timestamp: July 15, 2016, 04:29:51 pm
content: There are ARM9 and ARM11-based BMC SoCs from Aspeed and Emulex. Those are for running Linux though.Sent from my Nexus 5X using Tapatalk

author: plazma
author_rank: Frequent Contributor
timestamp: July 16, 2016, 08:16:32 am
content: Thanks for the hints. Microchip MEC1322 looks good. ARM Cortex M4 core and plenty of GPIO. Just what I'm looking for.