EZ80F91MCU ZILOG [Zilog, Inc.], EZ80F91MCU Datasheet - Page 20

• Manufacturer Part Number: EZ80F91MCU
• Description: eZ80Acclaim-TM Flash Microcontrollers
• Manufacturer: ZILOG [Zilog, Inc.]

Architectural Overview
PS019209-0504
Features
The eZ80F91 device is a member of ZiLOG’s family of eZ80Acclaim!
Microcontrollers. The eZ80F91 is a high-speed single-cycle instruction-fetch
microcontroller with a maximum clock speed of 50 MHz. It can operate in Z80-
compatible addressing mode (64 KB) or full 24-bit addressing mode (16 MB). The
rich peripheral set of the eZ80F91 makes it suitable for a variety of applications,
including industrial control, embedded communication, and point-of-sale termi-
nals.
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1. For simplicity, the term eZ80
document.
Single-cycle instruction fetch, high-performance, pipelined eZ80
10/100 BaseT Ethernet Media Access Controller with Media-Independent
Interface (MII)
256 KB Flash memory and 16 KB SRAM (8 KB user, 8 KB EMAC)
Low power features including SLEEP mode, HALT mode, and selective
peripheral power-down control
Two UARTs with independent baud rate generators
SPI with independent clock rate generator
I
IrDA-compliant infrared encoder/decoder
Glueless external peripheral interface with 4 Chip Selects, individual Wait
State generators, and an external WAIT input pin—supports Z80-, Intel-, and
Motorola-style buses
Fixed-priority vectored interrupts (both internal and external) and interrupt
controller
Real-time clock with on-chip 32 KHz oscillator, selectable 50/60Hz input, and
separate V
Four 16-bit Counter/Timers with prescalers and direct input/output drive
Watch-Dog Timer with internal oscillator clocking option
32 bits of General-Purpose I/O
OCI™ and ZDI debug interfaces
2
C with independent clock rate generator
DD
pin for battery backup
P R E L I M I N A R Y
®
CPU is referred to as CPU for the bulk of this
Product Specification
Architectural Overview
eZ80F91 MCU
®
™
CPU core
Flash
1
1