Infineon Technologies CY9AF156NABGL-GE1

Overview

CY9AF156NABGL-GE1 from Spansion (now Cypress Semiconductor, part of Infineon) is a 32-bit ARM Cortex-M3 microcontroller with dual-bank flash (496 KB upper + 16 KB lower), 64 KB on-chip SRAM (32 KB SRAM0 + 32 KB SRAM1), and operates up to 40 MHz. It integrates UART/CSIO/I²C serial interfaces, 24-channel 12-bit ADC (2.0 µs conversion), 16-channel base timer, RTC, QPRC, HDMI-CEC, and six low-power modes - deployed in industrial motor control and embedded HMI systems.

For engineers reviewing the CY9AF156NABGL-GE1 datasheet, CY9AF156NABGL-GE1 pinout, CY9AF156NABGL-GE1 application, or CY9AF156NABGL-GE1 equivalent, key selection criteria include dual-bank flash execution capability, 5V-tolerant GPIO count (up to 103 pins in 120-pin LQFP), sub-3.6 V operation, and integrated hardware watchdog clocked by 100 kHz CR oscillator for fail-safe wake-up.

Technical Context

The CY9AF156NABGL-GE1 implements an ARM Cortex-M3 r2p1 core with NVIC supporting 48 peripheral interrupts and 16 priority levels, plus a 24-bit SysTick timer. Its memory subsystem includes dual-operation Flash enabling concurrent read-erase-write across banks and two independent SRAM blocks (SRAM0 on I/D-code bus, SRAM1 on system bus).

Peripheral architecture features an 8-channel DMA controller with 32-bit addressing, multi-function serial interface configurable per channel as UART/CSIO/I²C, and dedicated motor-control blocks including PWM, dead-time insertion, and A/D activation compare. Clock supervision uses built-in CR oscillators to monitor external main clock integrity.

Key Specifications

Pinout & Package

Package: 120-pin LQFP (14 mm × 14 mm, 0.4 mm pitch), RoHS-compliant, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with MB9AF156NABGL-GE1 and STM32F103VCT6, the CY9AF156NABGL-GE1 delivers unique value in deterministic motor control through integrated QPRC and dual-bank Flash, while the STM32 variant trades those for raw clock speed and broader ecosystem tooling - making the choice dependent on whether encoder interface fidelity or development velocity dominates the design requirement.

Availability

CY9AF156NABGL-GE1 is available at Aetrix Electronics and suitable for industrial motor control, embedded HMI panels, smart energy metering, and home audio/video remote hubs requiring stable component supply across extended product lifecycles.

Supply support for CY9AF156NABGL-GE1 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

Spansion Inc., acquired by Cypress Semiconductor in 2015 and later by Infineon Technologies in 2020, specialized in embedded flash microcontrollers and memory solutions for industrial and automotive markets.

The MB9A150RA series - including CY9AF156NABGL-GE1 - was designed for cost-sensitive, low-power embedded controllers requiring robust peripheral integration, dual-bank flash for field updates, and motor-control-specific functions like QPRC and dead-time PWM.

FAQ

What is the maximum operating frequency and supported voltage range for CY9AF156NABGL-GE1?

The CY9AF156NABGL-GE1 operates at up to 40 MHz with a supply voltage range of 1.65 V to 3.6 V. This range supports direct connection to single-cell Li-ion batteries or standard 3.3 V power rails without external regulators. The core's performance is fully specified across this voltage window, and all peripherals - including ADC, timers, and serial interfaces - maintain guaranteed timing behavior within these limits.

Does CY9AF156NABGL-GE1 support in-system programming and field firmware updates?

Yes - its dual-bank Flash architecture (496 KB upper + 16 KB lower) enables true in-system programming. While executing code from one bank, the other can be erased and reprogrammed via UART, CSIO, or I²C. This allows safe over-the-air updates without halting real-time control loops, a critical capability for industrial equipment requiring zero-downtime maintenance.

How many 5V-tolerant I/O pins does CY9AF156NABGL-GE1 provide, and which functions are supported?

The CY9AF156NABGL-GE1 offers 5V-tolerant I/O on selected pins within its 103 GPIO set - specifically on ports configured as general-purpose inputs or certain peripheral functions such as UART_RX and I²C_SDA/SCL. Tolerance is confirmed per "I/O Circuit Type" table in the datasheet (MB9AF156RA_DS706-00047), and applies only when VCC is ≥2.7 V. No output drivers are 5V-tolerant; level-shifting is required for 5V-driven outputs.

Is the Real-time Clock (RTC) operational in all low-power modes, and what backup options exist?

The RTC remains active in SLEEP, TIMER, and RTC low-power modes using the 32.768 kHz sub-clock (EXTAL32 or internal CR oscillator). In STOP and Deep standby modes, RTC operation depends on external 32.768 kHz crystal or oscillator connection - the internal CR oscillator is disabled. A dedicated RTC power domain (VDDRTC) allows battery-backed operation when main VCC is removed, preserving calendar time across full system power cycles.