Renesas 89H12NT12G2ZAHLI8

Overview

89H12NT12G2ZAHLI8 from IDT is an evaluation board designed for the PES12NT12G2 PCIe 2.1 Gen2 12-lane, 12-port switch - supporting x1/x2/x4 port configurations, automatic lane reversal, per-port link width negotiation, and NTB multi-root capability. It enables full hardware validation of PCIe switching in server and storage interconnect applications.

For engineers reviewing the 89H12NT12G2ZAHLI8 datasheet, 89H12NT12G2ZAHLI8 pinout, 89H12NT12G2ZAHLI8 application, or 89H12NT12G2ZAHLI8 equivalent, this page delivers verified board-level specifications, clocking architecture, power sequencing, SMBus/JTAG interface access, and configuration options for PCIe switch evaluation and system-level debug.

Technical Context

The 89H12NT12G2ZAHLI8 implements a complete test platform for the PES12NT12G2 switch, featuring dual differential reference clock inputs (100/125 MHz), configurable common/non-common/local port clocking modes, and support for up to eight NTB ports. All 12 PCIe lanes are routed to mezzanine and SAS connectors with flexible breakout options.

It integrates five dedicated voltage regulators (VDDCORE = 1.0 V, VDDPEA = 1.0 V, VDDPETA = 1.0 V, VDDPEHA = 2.5 V, VDDIO = 3.3 V), strict power-up sequencing (VDDCORE must stay ≥1.0 V below VDDIO), and onboard clock generation via ICS841484 (U49) tied to a 25 MHz oscillator (X1).

Key Specifications

Availability

89H12NT12G2ZAHLI8 is available at Aetrix Electronics and suitable for PCIe switch validation, server backplane prototyping, storage interconnect testing, and NTB-based multi-root system development requiring stable component supply and long-term evaluation board availability.

Supply support for 89H12NT12G2ZAHLI8 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 (IDT), now part of Renesas Electronics, is a fabless semiconductor company specializing in timing, memory interface, RF, and high-performance interconnect solutions for datacenter, communications, and industrial systems.

The 89H12NT12G2ZAHLI8 belongs to IDT's PCIe Inter-Domain Switch evaluation platform family, engineered to accelerate validation of PES-series switches in real-world server, storage, and embedded PCIe fabric deployments.

FAQ

What is the primary function of the 89H12NT12G2ZAHLI8 evaluation board?

The 89H12NT12G2ZAHLI8 evaluation board is a dedicated hardware platform for evaluating the PES12NT12G2 PCIe 2.1 Gen2 12-port, 12-lane switch. It provides full access to all 12 lanes via mezzanine and SAS connectors, supports NTB, local port clocking, and power-on reconfiguration via SMBus-connected EEPROM - enabling comprehensive functional and system-level validation of the 89H12NT12G2ZAHLI8 target device.

Does the 89H12NT12G2ZAHLI8 support PCIe Gen2 speeds and what clock frequencies does it accept?

Yes, the 89H12NT12G2ZAHLI8 supports PCIe Base Specification 2.1 at 5 GT/s (Gen2). It accepts dual mandatory differential reference clocks at either 100 MHz or 125 MHz, selectable via SW10[2] and S10[1] DIP switches, and sourced from SMA connectors, the onboard ICS841484 clock generator, or SATA interfaces - ensuring compliance with PCIe clocking requirements for both common and non-common clock topologies.

How is power delivered and regulated on the 89H12NT12G2ZAHLI8 board?

The 89H12NT12G2ZAHLI8 uses a 24-pin EPS12V connector (J69) to accept external +12V3, +5V, and +3.3V supplies. Five dedicated regulators generate VDDCORE (1.0 V), VDDPEA (1.0 V), VDDPETA (1.0 V), VDDPEHA (2.5 V), and VDDIO (3.3 V) for the PES12NT12G2 switch. Critical power sequencing requires VDDCORE to remain at least 1.0 V below VDDIO during ramp-up - enforced by regulator design and layout.

Can the 89H12NT12G2ZAHLI8 be used to evaluate NTB (Non-Transparent Bridge) functionality?

Yes, the 89H12NT12G2ZAHLI8 supports NTB mode - up to eight ports of the underlying PES12NT12G2 switch can be configured as NTB ports for multi-root PCIe systems. The board provides full SMBus and JTAG access to configure NTB registers, validate address translation, and test peer-to-peer DMA across root complexes - confirmed in IDT's Device User Manual and AN-715 application note referenced in the EB-LOGAN-19 documentation.

What interfaces are available for configuring and debugging the 89H12NT12G2ZAHLI8 board?

The 89H12NT12G2ZAHLI8 provides three primary configuration/debug interfaces: (1) SMBus Master (connected to serial EEPROM for boot configuration), (2) SMBus Slave (4-pin header for host-side control), and (3) IEEE 1149.1-compliant JTAG header (U16) for boundary scan and low-level register access. All are documented in Tables 2.14–2.16 of the EB-LOGAN-19 manual and physically implemented on the board.