Infineon Technologies C161PILMCAFXUMA1

Overview

C161PILMCAFXUMA1 from Infineon Technologies is a 16-bit single-chip microcontroller in the C166 family, serving as a high-performance embedded control unit with integrated 10-bit ADC, dual serial channels (including I²C), and on-chip PLL clock generation. It features 1 KB IRAM, 2 KB XRAM, 8-channel PEC, 100-pin MQFP/TQFP package, and operates at up to 25 MHz CPU clock for industrial motor control and power conversion systems.

For engineers reviewing the C161PILMCAFXUMA1 datasheet, C161PILMCAFXUMA1 pinout, C161PILMCAFXUMA1 application, or C161PILMCAFXUMA1 equivalent, key selection criteria include its 10-bit ADC conversion time down to 7.8 µs, 16-priority interrupt system with 40 ns sample rate, programmable external bus interface supporting up to 8 MB address space, and real-time clock with watchdog timer - all critical for deterministic real-time control in resource-constrained environments.

Technical Context

The C161PILMCAFXUMA1 implements a 4-stage pipeline 16-bit CPU delivering 8 MIPS at 25 MHz, with single-cycle context switching and register-based architecture optimized for HLL and RTOS support. Its peripheral event controller enables zero-overhead data transfers between memory and peripherals such as the 10-bit ADC or serial interfaces.

On-chip clock generation uses a configurable PLL (1:1.5 to 1:5) or direct external clock input, feeding a divider chain that drives CPU, peripheral, and I/O clocks independently. The device supports multiplexed/demultiplexed 8/16-bit external buses with five programmable chip-select signals and flexible wait-state control per address range.

Key Specifications

Pinout & Package

Package: 100-pin MQFP (Metric Quad Flat Package), 14 × 20 mm body, 0.5 mm pitch, lead-free (RoHS-compliant) variant per ordering code suffix 'UMA1'.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit microcontroller applications.

Compared with the C161PILMCAFXUMA1, the SAB-C167CI-LM offers greater computational headroom at the cost of design complexity and board area, while the SAF-C161CS-LM sacrifices peripheral richness for lower BOM cost - making the C161PILMCAFXUMA1 the optimal balance for mid-tier industrial controllers requiring integrated communication and analog sensing.

Availability

C161PILMCAFXUMA1 is available at Aetrix Electronics and suitable for industrial motor control, uninterruptible power supply (UPS), and programmable logic controller (PLC) I/O modules requiring stable component supply and long-term lifecycle support.

Supply support for C161PILMCAFXUMA1 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

Infineon Technologies AG is a German semiconductor manufacturer specializing in power management, automotive, and industrial control ICs, with global R&D and manufacturing infrastructure.

The C161PI belongs to Infineon's legacy C166 microcontroller family, designed specifically for deterministic real-time embedded control in cost-sensitive industrial applications where integration of analog, digital, and communication peripherals reduces system-level component count.

FAQ

What is the maximum operating frequency of the C161PILMCAFXUMA1 CPU core?

The C161PILMCAFXUMA1 CPU operates at a maximum clock frequency of 25 MHz, achieving an 80 ns instruction cycle time. This frequency is derived from the on-chip PLL, which accepts a 1–25 MHz crystal or external clock input and scales it via selectable dividers (1:1.5 to 1:5). The device's AC characteristics specify timing compliance up to this rated frequency under industrial temperature conditions (–40°C to +85°C).

Does the C161PILMCAFXUMA1 support in-system programming (ISP)?

No, the C161PILMCAFXUMA1 does not support ISP via standard interfaces. It contains mask-ROM for program storage, meaning firmware is fixed at fabrication. However, it includes an on-chip bootstrap loader accessible via UART (P3.10/P3.11), allowing field firmware updates only if the initial ROM image includes loader support and proper entry-point configuration - not a universal feature across all mask versions.

Can the on-chip 10-bit ADC operate simultaneously with CPU execution?

Yes, the 10-bit ADC operates independently of CPU execution using dedicated hardware triggers - including software start, timer match, or external event signals. Conversion results are stored in dedicated result registers and can generate interrupts or trigger PEC transfers, enabling fully concurrent analog acquisition and control loop processing without CPU polling overhead.

Is the C161PILMCAFXUMA1 pin-compatible with other C166-family microcontrollers?

The C161PILMCAFXUMA1 shares the same 100-pin MQFP/TQFP footprint with several C166 derivatives (e.g., C167CI, C165), but pin functions differ significantly across variants. For example, P5.14/T4EUD and P5.15/T2EUD are unique to C161PI for timer external up/down control, while other parts assign those pins to different peripherals. Direct substitution requires full register and pin-function validation.