eZ80F91 Product Brief0 pages

eZ80Acclaim!® Flash Microcontrollers

eZ80F91 MCU
Product Brief
PB013507-0412

Product Block Diagram

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eZ80F91 MCU

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256 KB Flash +
512 B Flash

32-Bit GPIO

8 KB SRAM

10/100 Mbps
Ethernet MAC
8 KB Frame Buffer

Infrared
Encoder/ 2 UART
Decoder
4 PRT
4 CS
+ WSG

I2C

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SPI
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Real Time
Clock

WDT
JTAG

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ZDI

PLL

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Key Features
The eZ80F91 MCU is a member of Zilog’s
eZ80Acclaim! product family, which offers onchip Flash versions of Zilog’s eZ80® processor
core. The eZ80F91 MCU offers the following
features:
• 50 MHz high-performance eZ80 CPU
• 256 KB Flash Program Memory and extra 512
B device configuration Flash Memory
• 32 bits of General-Purpose Input/Output (GPIO)
• 16 KB total on-chip high-speed SRAM:
– 8 KB for general-purpose use
– 8 KB for 10/100 BaseT Ethernet Media
Access Controller (EMAC) high-speed
frame buffer
• IrDA-compatible infrared encoder/decoder
• Two universal asynchronous receiver/
transmitter (UARTs) with independent baud
rate generators

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Inter-integrated circuit (I2C) and serial
peripheral interface (SPI) with independent
clock rate generator
Four counter/timers with prescalers supporting
event counting, input capture, output compare,
and Pulse Width Modulator (PWM) modes
Watchdog Timer (WDT) with internal RC
clocking option
Real time clock (RTC) with on-chip 32 KHz
oscillator, selectable 50/60 Hz input, and separate RTC_VDD pin for battery backup
Glueless external memory interface with 4
Chip-Selects/Wait-State Generators and
external WAIT input pin. It also supports Intel
and Motorola buses
JTAG and Zilog Debug Interface (ZDI) supporting emulation features
Low-power PLL and on-chip oscillator
Programmable-priority vectored interrupts,
non-maskable interrupts, and interrupt
controller
New DMA-like eZ80 CPU instructions
Power management features supporting
HALT/SLEEP modes and selective peripheral
power-down controls
144-pin BGA package or 144-pin LQFP
package
3.0 V to 3.6 V supply voltage with 5 V-tolerant
inputs
Operating temperature ranges:
– Standard, 0ºC to +70ºC
– Extended, –40ºC to +105ºC

General Description
The eZ80F91 MCU is industry’s first MCU
featuring a high-performance 8-bit microcontroller
with an integrated 10/100 BaseT EMAC. It is a
power-efficient, optimized pipeline architecture

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