EPM7256AEFI256-7

Introduction: The EPM7256AEFI256-7 is a CPLD (Complex Programmable Logic Device) from Altera (now Intel) in the EPM family. It provides a programmable logic fabric suitable for glue logic, small state machines, and peripheral interfacing.
Key points:
- Density and package: mid-density CPLD with a large macrocell count, typically in a 256-pin package.
- Non-volatile configuration: configures itself on power‑up without requiring an external PROM; supports in-system programming via JTAG.
- Logic resources: macrocell-based fabric with flip-flops and LUT-like functionality, plus global signals and multiple I/O banks for flexible timing and routing.
- Speed grade: -7 indicates its faster speed option within the family.
- Design flow: programmed with HDL (Verilog/VHDL) using Quartus Prime/II; programmed with a programmer (e.g., USB-Blaster).
Applications: suitable for glue logic, simple state machines, interface bridging, and timing-critical control in embedded systems where a compact, single-chip programmable logic solution is advantageous.

Key features of EPM7256AEFI256-7 (MAX 7000A EPLD):
- 256-macrocell EPLD in a 256-pin EFI package
- 5V operation with standard I/O
- Speed grade -7 (fastest in typical range)
- 256 macrocells with individual D-type registers
- Programmable logic with flexible I/O and tri-state outputs
- Built-in programmable interconnect for complex logic
- JTAG boundary-scan for programming and testing
- In-system/programming capability (ISP) via standard programmer
- Suitable for glue logic, state machines, timing-critical interfaces
- Non-volatile configuration via standard MAX 7000A programming flow
- Compatible with Altera MAX 7000A design tools
Note: Exact I/O counts and package options may vary by revision; verify against the datasheet for your specific package/revision.

- Pin count: 256 pins (EFI256 package)
- Function: Altera EPM7256A is a MAX 7000A family EPLD/CPLD, a 256‑pin programmable logic device used to implement combinational and sequential logic for glue or small digital designs.

- Manufacturer: Altera Corporation (now part of Intel).
- What kind of company: A semiconductor company that designs programmable logic devices, such as CPLDs and FPGAs.

Typical application areas for EPM7256AEFI256-7 (MAX 7000A CPLD):
- Glue logic for microprocessors/ASICs
- Address decoding, peripheral control and bus interface
- Finite state machines, counters, timers and sequencers
- Memory/I/O interface logic (SPI, I2C, parallel buses)
- Data-path control, decoding/encoding and bit manipulation
- Clock distribution and timing/control signal generation
- Display drivers, keypad debounce, LED control in consumer/industrial equipment
These devices are used to replace small PAL/GAL logic with a low-cost, programmable solution.

A 256‑pin FineLine BGA (FineLine Ball Grid Array) package.