LTPI Protocolos suportados

Computadores e servidores

Low Throughput Peripheral Interface

O que é LTPI?

LTPI (Low Throughput Peripheral Interface) is an Intel-defined serial bus used for communication between a host processor or BMC and platform peripherals in server and computing platforms. LTPI provides a lightweight, low-pin-count alternative to eSPI for connecting peripherals that do not require high bandwidth, such as GPIO expanders, fan controllers, and basic I/O devices. The interface uses a synchronous clock and data pair, operating at speeds up to 24 MHz. Engineers working on Intel server platform bring-up and debug need LTPI decode capability to verify peripheral enumeration, command/response exchanges, and data transfers between the host and LTPI-attached devices.

LTPI Referência rápida

type Serial, synchronous
signals CLK, DATA
max Speed 24 MHz
voltage Range 1.8V
features Intel platform bus

Instrumentos Acute compatíveis com LTPI

Série TravelLogic

Série TravelLogic
Série LA4000

Série LA4000

Pronto para analisar este protocolo?

Veja como os instrumentos Acute capturam e decodificam este protocolo em tempo real. Solicite uma demo ou entre em contato com nossa equipe.

Solicitar uma demo Ver produtos compatíveis

Como analisar LTPI com instrumentos Acute

1

Conecte seu analisador lógico Acute as linhas LTPI CLK e DATA na placa de plataforma.

2

Conecte um fio terra a referência de terra da placa alvo.

3

No software Acute, selecione o LTPI protocol decoder e atribua CLK e DATA aos canais de entrada correspondentes.

4

Configure o decodificador para expected bus speed and framing parameters.

5

Capture e visualize os LTPI transactions showing command types, register addresses, and data payloads.

Perguntas frequentes

Qual taxa de amostragem e necessária para a análise LTPI ?
LTPI operates at clock speeds up to 24 MHz. For reliable decoding, use a sample rate of at least 100 MHz (approximately 4x the clock frequency). A sample rate of 200 MHz or higher is recommended to clearly resolve clock-data relationships and accurately decode command and data phases.
Por que meu decodificador LTPI não reconhece as transações?
LTPI decode failures often result from incorrect voltage threshold settings — LTPI signals typically use 1.8V logic levels. Verify that the logic analyzer's input threshold is configured for 1.8V. Also check that both CLK and DATA connections are solid and that the probes are attached at the correct test points on the board. If the platform has not completed initialization, LTPI traffic may not yet be present.
Quantos canais são necessários para a análise de LTPI ?
LTPI requires 2 channels — CLK and DATA. If you need to monitor additional sideband signals such as reset or interrupt lines, add one channel per signal. For platforms with multiple LTPI buses, allocate 2 channels per bus.

Protocolos relacionados

eSPI SMBus

Precisa de ajuda para escolher o instrumento certo para o seu protocolo? Entre em contato com nossa equipe de engenharia.

Ver produtos compatíveis Fale conosco