EZ80F91AZA50EK 8-bit microcontroller, eZ80AcclaimPlus!, LQFP-144

The eZ80F91 device from Zilog is a member of the eZ80Acclaim! family from Zilog. Flash Application-Specific Standard Products (ASSPs). The eZ80F91 MCU is a high-speed ASP with a maximum clock speed of 50 MHz and single-cycle instruction fetch. It operates in Z80-compatible addressing mode (64 KB) or in full 24-bit addressing mode (16 MB). The eZ80F91's extensive peripherals make it suitable for a wide range of applications, including industrial control, embedded communications and point-of-sale terminals.

Features - High performance eZ80 CPU core with single cycle instruction fetching and pipelining - 10/100 BaseT Ethernet media access controller with media independent interface (MII) - 256 KB flash memory - 16 KB SRAM (8 KB user and 8 KB Ethernet) - Power-saving functions such as SLEEP mode, HALT mode and selective peripherals Shutdown control - Two Universal Asynchronous Receiver/Transmitters (UART) with independent baud rate generators Rate generators (BRG) - Serial peripheral interface (SPI) with independent clock generator - I2C with independent clock generator - IrDA-compatible infrared encoder/decoder - Glueless external peripheral interface with 4 chip selects, individual wait state generators, an external WAIT input pin; supports Z80-, Intel- and Motorola-like buses - Vectored interrupts with fixed priority (both internal and external) and interrupt controller - Real-time clock with separate VDD pin for battery backup and selectable on-chip 32 kHz oscillator or external 50/60 Hz input - Four 16-bit counters/timers with prescalers and direct control of the inputs/outputs - Watchdog timer with internal oscillator clocking as an option - 32-bit general purpose inputs/outputs (GPIO) - On-chip instrumentation (OCI™) and Zilog debug interfaces (ZDI) - IEEE 1149.1-compatible JTAG interface