Renesas 89H12NT12G2ZAHLGI

Overview

89H12NT12G2ZAHLGI from IDT is an evaluation board designed to validate the PES12NT12G2 - a PCIe 2.1-compliant, 12-lane, 12-port Gen2 switch supporting x1/x2/x4 link widths, automatic lane reversal, and NTB multi-root functionality in server and storage interconnect applications.

For engineers reviewing the 89H12NT12G2ZAHLGI datasheet, 89H12NT12G2ZAHLGI pinout, 89H12NT12G2ZAHLGI application, or 89H12NT12G2ZAHLGI equivalent, this board enables full hardware validation of port configuration, clocking modes (common/non-common/local), SMBus-based EEPROM programming, and PCIe link training under real system-level conditions including hot-plug and power sequencing compliance.

Technical Context

The 89H12NT12G2ZAHLGI implements a complete test platform for the PES12NT12G2 switch IC, providing breakout access to all 12 PCIe lanes via mezzanine connectors and SAS/SATA interfaces. It supports flexible reference clock sourcing - global (100/125 MHz) from SMA, onboard ICS841484 generator, or SATA connectors - and local port clocking on designated ports using dedicated mux/buffer circuitry (U118/U120).

Power delivery follows PCIe Gen2 requirements with discrete regulators supplying VDDCORE (1.0 V), VDDPEA (1.0 V), VDDPETA (1.0 V), VDDPEHA (2.5 V), and VDDIO (3.3 V) from a 12 V input. Reset is implemented via fundamental PERST# propagation and downstream warm reset, while boot configuration is controlled by DIP switches (SW10, S10, S17, S19) and jumpers defining CLKMODE, GCLKFEL, and clock source routing.

Key Specifications

Availability

89H12NT12G2ZAHLGI is available at Aetrix Electronics and suitable for PCIe switch validation, server backplane prototyping, storage interconnect development, and NTB-based multi-root system testing requiring stable component supply and full hardware debug visibility.

Supply support for 89H12NT12G2ZAHLGI includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Integrated Device Technology, Inc. (IDT) was a fabless semiconductor company specializing in high-performance timing, memory interface, RF, and interconnect solutions before its acquisition by Renesas in 2019.

The 89H12NT12G2ZAHLGI belongs to IDT's Logan-series evaluation platforms, purpose-built to accelerate validation of PCIe Gen2 switch ICs like the PES12NT12G2 in enterprise infrastructure and data center applications.

FAQ

What is the primary function of the 89H12NT12G2ZAHLGI evaluation board?

The 89H12NT12G2ZAHLGI evaluation board is a hardware platform designed exclusively to evaluate the PES12NT12G2 PCIe 2.1 switch IC. It provides full electrical access to all 12 lanes and 12 ports, supports configurable clocking modes (global, non-common, local port), enables SMBus-based EEPROM programming, and validates power sequencing, reset behavior, and link training per PCIe specification - all critical for server and storage interconnect design verification.

Which PCIe switch IC does the 89H12NT12G2ZAHLGI support?

The 89H12NT12G2ZAHLGI is specifically configured for the IDT PES12NT12G2 - a 12-lane, 12-port PCIe Gen2 switch compliant with PCI Express Base Specification Revision 2.1. It also supports evaluation of related family members such as PES16NT16G2 and PES24NT24G2 through jumper and adapter reconfiguration, but its default and validated target is the PES12NT12G2 device.

Does the 89H12NT12G2ZAHLGI include onboard clock generation?

Yes, the 89H12NT12G2ZAHLGI integrates the ICS841484 clock generator (U49) driven by a 25 MHz oscillator (X1), delivering a fixed 100 MHz differential output accessible via SMA connectors J119/J120 and SATA connector J121. This onboard source serves as a configurable global reference clock option, selectable via jumper J6 and DIP switch S10[1], and is used during standalone validation without host clock dependency.

How is power delivered and regulated on the 89H12NT12G2ZAHLGI board?

Power is supplied to the 89H12NT12G2ZAHLGI via a 24-pin Molex EPS12V connector (J69), accepting 12 V input. Five dedicated DC-DC regulators generate the required switch voltages: U59 (1.0 V VDDCORE), U62 (1.0 V VDDPEA), U68 (1.0 V VDDPETA), U65 (2.5 V VDDPEHA), and U56 (3.3 V VDDIO). The board enforces the critical power-up sequence where VDDCORE must remain at least 1.0 V below VDDIO during ramp-up.

Can the 89H12NT12G2ZAHLGI be used for NTB (Non-Transparent Bridge) evaluation?

Yes, the 89H12NT12G2ZAHLGI fully supports NTB evaluation for the PES12NT12G2. Up to eight ports can be configured as NTB ports in multi-root topologies, and the board provides necessary signal access, clocking flexibility (including independent local port clocks), and configuration interfaces (SMBus Master/Slave, DIP switches) to enable peer-to-peer memory-mapped communication between separate PCIe domains - a key requirement for high-availability server and virtualized infrastructure validation.