Texas Instruments TMS370C6C2ANT

Overview

TMS370C6C2ANT from Texas Instruments is a one-time-programmable (OTP) 8-bit microcontroller with 8K-byte EPROM program memory, 128-byte RAM, and integrated peripherals including a four-channel 8-bit ADC2, SCI2 serial interface, 16-bit general-purpose timer, and 24-bit watchdog timer. It operates at 2–5 MHz SYSCLK using a PLL or divide-by-4 clock option and supports automotive, industrial, and consumer control applications requiring in-circuit programmability and low-power operation.

For engineers reviewing the TMS370C6C2ANT datasheet, TMS370C6C2ANT pinout, TMS370C6C2ANT application, or TMS370C6C2ANT equivalent, key selection considerations include OTP EPROM capacity (8K bytes), 28-pin PDIP/PLCC package compatibility, STANDBY/HALT low-power modes, register-to-register architecture with 256 general-purpose registers, and SCI2 asynchronous communication up to 156 Kbps at 5 MHz SYSCLK.

Technical Context

The TMS370C6C2ANT implements a register-to-register CPU architecture eliminating accumulator bottlenecks, supporting direct arithmetic/logical operations between any two of 256 general-purpose registers. Its memory map integrates 8K-byte EPROM (6000h–7FFFh), 128-byte RAM (0000h–007Fh), and peripheral file (1000h–107Fh) in a unified Von Neumann address space.

Peripheral control is fully memory-mapped: ADC2 registers reside at 1070h–107Fh, SCI2 at 1050h–105Fh, Timer1 at 1040h–104Fh, and system control at 1010h–101Fh. The device uses a dual-priority interrupt structure with five hardware interrupts-including INT1, T1INT, RXINT, TXINT, and ADINT-each with dedicated vectors and individually maskable sources.

Key Specifications

Pinout & Package

Package: 28-pin plastic DIP (N package) per Texas Instruments SPNS040B datasheet. Pinout validated from official top-view diagrams and pin descriptions for TMS370C6C2A/N variants.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit microcontroller applications.

Compared with TMS370C6C2ANT, TMS370C3C0ANT trades programmability for lower unit cost in stable-volume production, while SE370C6C2ANT provides reprogrammability at the expense of package robustness and production qualification-making TMS370C6C2ANT the optimal balance for low-volume manufacturing and field-updateable embedded systems.

Availability

TMS370C6C2ANT is available at Aetrix Electronics and suitable for automotive body electronics, industrial motor controllers, consumer appliance boards, and telecom peripheral interfaces requiring stable component supply across extended product lifecycles.

Supply support for TMS370C6C2ANT 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

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and digital signal technologies with decades of automotive and industrial qualification expertise.

The TMS370 family was designed for cost-effective real-time control in resource-constrained environments, integrating memory, timers, ADC, and serial interfaces into single-chip solutions for automotive electronics, industrial motors, and consumer appliances.

FAQ

What memory types and capacities does the TMS370C6C2ANT integrate on-chip?

The TMS370C6C2ANT integrates 8K bytes of one-time-programmable (OTP) EPROM for program storage, 128 bytes of static RAM for data and stack, and no on-chip EEPROM. The EPROM is mapped from address 6000h to 7FFFh and supports in-circuit programming via VPP applied to the MC pin. This configuration enables firmware updates without mask re-spin, making TMS370C6C2ANT ideal for low-volume production and field-reprogrammable applications.

How does the TMS370C6C2ANT handle low-power operation, and what modes are supported?

The TMS370C6C2ANT supports two hardware low-power modes: STANDBY and HALT. In STANDBY mode, the CPU halts but the internal oscillator and 16-bit timer remain active-enabling wake-up on external interrupt or timer event. In HALT mode, all clocks stop except the reset circuit, minimizing current draw while preserving RAM and peripheral register contents. Both modes are entered via the IDLE instruction and exited by RESET or enabled interrupts, making TMS370C6C2ANT suitable for battery-backed or energy-sensitive applications.

What is the function of the MC pin on the TMS370C6C2ANT, and how is it used during programming?

The MC (Mode Control) pin on the TMS370C6C2ANT serves as the programming voltage input for OTP EPROM. During in-circuit programming, a 13 V supply must be applied to the MC pin while executing EPROM write sequences controlled by the EPCTL register (P01Ch). The MC pin also functions as a general-purpose input when not in programming mode. This dual-role design allows TMS370C6C2ANT to retain full I/O capability in normal operation while enabling secure, controlled firmware updates-critical for production calibration or bug fixes without board redesign.

Does the TMS370C6C2ANT support interrupt prioritization, and how is it configured?

Yes, the TMS370C6C2ANT implements a two-level interrupt priority system with independent global masks (IE1 and IE2 in the Status Register). Each of the five hardware interrupts-INT1, T1INT, RXINT, TXINT, and ADINT-is assigned a fixed priority within its level, and software can route any interrupt to either level during initialization. Priority configuration is performed via dedicated bits in peripheral control registers (e.g., T1PRI at P04F.6–P04F.7), allowing deterministic real-time response-for example, assigning ADC conversion completion to Level 1 and SCI transmit ready to Level 2 ensures timely sensor data capture without UART latency.

What clocking options does the TMS370C6C2ANT provide, and how do they affect system performance?

The TMS370C6C2ANT offers two clocking modes: a divide-by-1 PLL supporting 2–5 MHz SYSCLK for maximum throughput, and a divide-by-4 option supporting 0.5–5 MHz SYSCLK for lower EMI and reduced power. The PLL mode enables higher instruction execution rates and faster SCI2 baud rates (up to 156 Kbps at 5 MHz), while the divide-by-4 mode improves noise immunity in electrically noisy environments. Clock source selection is configured via SCCR0 bits, and both modes operate from either an external crystal (XTAL1/XTAL2) or external clock (CLKIN), giving designers flexibility to optimize TMS370C6C2ANT for speed, stability, or EMC compliance.