Renesas 89H12NT12G2ZAHL8

Overview

89H12NT12G2ZAHL8 from IDT is an evaluation board (EB-LOGAN-19) designed for the PES12NT12G2 - a PCIe 2.1-compliant, 12-lane, 12-port Gen2 switch. It supports x1/x2/x4 port configurations, local port clocking, NTB, and DMA evaluation. The board features dual Mezzanine connectors, SAS/SATA breakout capability, and full JTAG/SMBus debug interfaces for server and storage interconnect validation.

For engineers reviewing the 89H12NT12G2ZAHL8 datasheet, 89H12NT12G2ZAHL8 pinout, 89H12NT12G2ZAHL8 application, or 89H12NT12G2ZAHL8 equivalent, this page delivers verified hardware configuration options, clocking modes (common/non-common/local), power sequencing requirements, reset behavior, and adapter compatibility for PCIe switch validation in multi-root and fan-out topologies.

Technical Context

The 89H12NT12G2ZAHL8 implements the EB-LOGAN-19 reference design for IDT's PES12NT12G2 PCIe switch, supporting PCIe Base Specification 2.1 at 5 GT/s. It provides configurable global reference clocks (100/125 MHz) via SMA, SATA, or onboard ICS841484 generator, with mandatory differential pair sourcing for both CLK0/CLK1 inputs.

Hardware-level control includes DIP-switch–based boot vector (SW10), jumper-selectable clock sources per port group (e.g., S17/S19 for ports 8/16), and SMBus master/slave interfaces tied to serial EEPROMs and I/O expanders. Power delivery uses five dedicated regulators for VDDCORE (1.0 V), VDDPEA (1.0 V), VDDPETA (1.0 V), VDDPEHA (2.5 V), and VDDIO (3.3 V), with strict VDDCORE-to-VDDIO ramping constraints.

Key Specifications

Availability

89H12NT12G2ZAHL8 is available at Aetrix Electronics and suitable for PCIe switch validation, server interconnect prototyping, and storage subsystem development requiring stable component supply and full hardware configurability.

Supply support for 89H12NT12G2ZAHL8 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 timing, memory interface, RF, and PCIe interconnect solutions before its acquisition by Renesas in 2019.

The 89H12NT12G2ZAHL8 belongs to IDT's EB-LOGAN series of evaluation platforms, engineered specifically to validate PCIe switch functionality-including partitioning, NTB, hot-plug, and multi-clock domain operation-in enterprise server and storage applications.

FAQ

What is the primary function of the 89H12NT12G2ZAHL8 evaluation board?

The 89H12NT12G2ZAHL8 is the EB-LOGAN-19 evaluation board designed exclusively for the IDT PES12NT12G2 PCIe 2.1 switch. Its purpose is to enable hardware validation of port configuration, lane bifurcation, NTB mode, local port clocking, and system-level interoperability with host root complexes and endpoint devices. It is not a standalone IC or production component.

Does the 89H12NT12G2ZAHL8 include the PES12NT12G2 switch IC mounted on-board?

Yes, the 89H12NT12G2ZAHL8 evaluation board has the PES12NT12G2 PCIe switch IC physically populated on the main PCB. The board brings out all 12 lanes to Mezzanine and SAS connectors, includes full power regulation, clock distribution, JTAG, and SMBus interfaces - enabling immediate functional testing without additional assembly.

Which clock frequencies does the 89H12NT12G2ZAHL8 support for the PES12NT12G2 device?

The 89H12NT12G2ZAHL8 supports 100 MHz and 125 MHz global reference clock inputs for the PES12NT12G2, selected via SW10[2] (GCLKFEL). The onboard ICS841484 clock generator defaults to 100 MHz output, and local port clocks (e.g., for ports 8/16) must be 100 MHz only - as required by PCIe 2.1 specification compliance.

Can the 89H12NT12G2ZAHL8 be used to evaluate multi-root I/O virtualization (MR-IOV) scenarios?

Yes, the 89H12NT12G2ZAHL8 supports NTB (Non-Transparent Bridge) mode, allowing up to eight ports of the PES12NT12G2 to be configured as NTB endpoints - enabling peer-to-peer memory-mapped communication between separate PCIe hierarchies, a core requirement for MR-IOV and multi-root storage architectures.

What power supply requirements must be met to operate the 89H12NT12G2ZAHL8?

The 89H12NT12G2ZAHL8 requires a 24-pin EPS12V power connector (J69) delivering +12V, +5V, +3.3V, and PS_ON signals. It does not accept ATX power. Critical sequencing mandates that VDDCORE remain at least 1.0 V below VDDIO during power-up; all five regulated voltages (1.0 V, 1.0 V, 1.0 V, 2.5 V, 3.3 V) are generated on-board from the 12 V input.