Talk:Low Pin Count

2.56 Mbyte/s

At 33.3 MHz, the typical I/O transfer rate is about 2.56 Mbyte/s.

Why, according to the article, LPC runs at 33.3 MHz w/ 4bit, so the maximaum transfer rate schould be 16.6 MB/s. And why is it slightly faster than 16bit-ISA? 8.33MHz@16bit = 16.66 MB/s, which is the same as LPC. --MrBurns (talk) 22:05, 22 January 2009 (UTC)

The http://en.wikipedia.org/wiki/List_of_device_bandwidths#Computer_buses article agrees with you.--Anss123 (talk) 07:05, 23 January 2009 (UTC)

LPC daughterboards

This article states that:

❝No connector is defined, and no LPC peripheral daughterboards are available, except Trusted Platform Modules (TPMs) with a TPM daughterboard whose pinout is proprietary to the motherboard vendor.❞

It's not true because the following Intel's document defines mechanical, electrical, timing, programmatic and other interfacing requirements for add-on LPC modules.

"Installable LPC Debug Module Design Guide" (PDF). www.intel.com. Intel. Archived from the original (PDF) on 2000-02-07. This guide describes how to design a debug port for a PC that has no PC-AT* serial COM port. The PC-AT serial COM port has been used by low level debuggers, such as Operating System KERNAL debuggers, as the connection point between the PC under test and the debugger console. The PC-AT serial COM port is no longer a feature on legacy free and legacy reduced PCs. {{cite web}}: Unknown parameter |dead-url= ignored (|url-status= suggested) (help)

Pages 13—15 define LPC connector for attachable modules: "The motherboard connector for desktop systems is a vertical 0.1 x 0.1 pin header with 16 or 20 pins. Pin 4 is voided to insure proper alignment with the mating cable. The header pins are 0.025 inch square posts or a round post with equivalent dimensioning. The header parameters are specified in Table 1. Due to the wide availability of this type of connector, no manufacturer part number is specified."

Examples of third-party LPC attachable modules can be found here: Peripherals - Proprietary Expansion Modules. For example, such modules provide parallel (LPT) and serial (COM RS-232/RS-485) interfaces.

93.85.186.175 (talk) 01:53, 4 June 2017 (UTC)

It's worth noting that there is now an adapter in development that actually allows connecting ISA card to the LPC bus through the TPM socket. This would seem to not only provide further evidence for the person above's point, but also evidence of other statements in the article being inaccurate as well, such as the bit about device discovery (the device being used appears to be an ISAPnP Sound Blaster 16), or the part about it only allowing certain devices, though given it's an audio device, it might count. I am in the midst of editing the article to reflect the above person's evidence (I hesitate to add anything referring to the hobbyist project mentioned as it hasn't had a proper release yet) but I'm a novice editor so feel free to revert or correct if necessary.

172.4.121.7 (talk) 22:39, 20 March 2023 (UTC)

References