Lattice LC4064V: Architecture, Key Features, and Target Applications
The Lattice LC4064V stands as a prominent member of the high-performance, low-power ispMACH® 4000V CPLD family from Lattice Semiconductor. This device exemplifies the ideal balance of power, cost, and flexibility, making it a preferred solution for a wide array of design challenges that require glue logic, interface bridging, and power management in space-constrained environments.
Architecture
The architecture of the LC4064V is built around a robust and efficient macrocell-based CPLD structure. At its core are multiple Function Blocks (FBs), each containing 16 macrocells. These macrocells are interconnected through a global routing pool (GRP), which ensures predictable, pin-to-pin timing delays—a hallmark of CPLD architectures. The device features 64 macrocells, providing ample logic resources. Each macrocell can be configured for combinatorial or registered logic operations, offering designers significant flexibility. The architecture also includes dedicated I/O cells that support various voltage standards (LVCMOS, LVTTL), enabling easy interfacing with other components in a system.
Key Features
The LC4064V is distinguished by several critical features that enhance its usability and performance:
Ultra-Low Power Consumption: Fabricated on an advanced CMOS process, it features zero-power (ZP) technology, which significantly reduces static power consumption, making it ideal for battery-operated and power-sensitive applications.
High Performance: The device supports clock frequencies exceeding 200 MHz and boasts propagation delays as low as 4.5 ns, ensuring it can handle high-speed control logic with ease.
High I/O-to-Logic Ratio: With up to 64 I/O pins, the LC4064V offers an excellent ratio of I/O to logic resources, perfect for applications that require extensive signal interfacing and bridging.
In-System Programmability (ISP): The device can be reprogrammed on the board via a standard JTAG interface. This facilitates rapid design iterations, field upgrades, and eases prototyping and debugging.
Enhanced Security: An integrated security bit prevents unauthorized access to the device's configuration, protecting intellectual property.
Target Applications
The combination of low power, small form factors (available in TQFP and other compact packages), and instant-on capability makes the LC4064V suitable for a diverse set of markets:
Portable and Consumer Electronics: Used for power sequencing, touch panel interface control, and sensor management in smartphones, tablets, and wearables.
Communications Systems: Employed for interface bridging (e.g., translating between SPI, I2C, and UART protocols), bus arbitration, and signal monitoring in network equipment.
Industrial Control: Ideal for implementing custom glue logic, motor control interfaces, and managing I/O expansion in industrial automation systems due to its deterministic timing and reliability.
Automotive Electronics: Applied in infotainment systems and dashboard controllers for logic integration and signal conditioning.
Computing: Serves as a power management controller and for configuring FPGAs or other system-on-chip (SoC) devices upon power-up.
The Lattice LC4064V CPLD is a highly versatile and efficient solution for modern digital design. Its predictable timing architecture, ultra-low power footprint, and rich I/O capabilities make it an indispensable component for system control, power management, and interface bridging across countless portable, industrial, and communication applications.
Keywords: CPLD, Low Power, Interface Bridging, In-System Programmability, Glue Logic
