User manual

ZiLOG Worldwide Headquarters • 532 Race Street • San Jose, CA 95126
Telephone: [phone] • Fax: [phone] • www.ZiLOG.com
Product Block Diagram
Features
The eZ80F91 microcontroller is a member of
ZiLOG’ s eZ80Acclaim!™ product f amily , which
of fers on-chip Flash v ersions of ZiLOG’ s eZ80
®
processor core. The eZ80F91 of fers the follo wing
features:
• 50 MHz High-Performance eZ80
®
CPU
• 256 KB Flash Program Memory plus e xtra 512 B
de vice confi guration Flash memory
• 32 bits of General-Purpose I/O
• 16 K B total on-chip high-speed SRA M:
– 8 KB for general-purpose use
– 8 KB for 10/100 BaseT Ethernet Media
Access Controller (EMA C) high-speed frame
b uf fer
• I rD A™-compatible Infrared Encoder/Decoder
• 2 U AR Ts with independent baud rate generators
• I
2
C with independent clock rate generator
• SPI with independent clock rate generator
• F our Counter/T imers with prescalers supporting
e v ent counting, input capture, output compare, and
PWM modes
• W atch-Dog T imer with internal RC clocking
option
• Real-time clock with on-chip 32 kHz oscillator ,
selectable 50/60 Hz input, and separate RTC_ V
DD
pin for battery backup.
• Glueless e xternal memory interf ace with 4 Chip-
Selects/W ait-State Generators and e xternal W
AIT
input pin. Supports Intel and Motorola b uses.
• JT A G Interf ace supporting emulation features
• Lo w-po wer PLL and on-chip oscillator
• Programmable-priority v ectored interrupts, non -
maskable interrupts, and interrupt controller
• Ne w DMA-lik e eZ80
®
CPU i nstructions
• Po wer management features supporting HAL T/
SLEEP modes and selecti v e peripheral po wer -
do wn controls
• 144-pin BGA or 144-pin LQFP p ackage
• 3.0–3.6 V supply v oltage with 5 V tolerant inputs
• Operating T emperature Ranges:
– Standard: 0ºC to +70ºC
– Extended: –40ºC to +105ºC
General Description
The eZ80F91 device is an industry first, featuring a
high-performance 8-bit microcontroller with an
integrated 10/100 BaseT Ethernet Media Access
controller (EMAC). It is a power-efficient, opti-
mized pipeline architecture microcontroller with a
maximum operating speed of 50 MHz. Offering
on-chip Flash memory, SRAM, Ethernet MAC,
and rich peripherals, the eZ80F91 is well-suited for
industrial, communication, automation, security,
and embedded Internet applications.
eZ80F91 MCU
256 KB Flash +
512 B Flash
32-Bit GPIO
8 KB SRAM
10/100 Mbps
Ethernet MAC
8 KB Frame Buffer
Infrared
Encoder/
Decoder
2 UART
I
2
C
SPI
4 PRT
WDT
Real-Time
Clock
4 CS
+ WSG
JTAG
ZDI
PLL
eZ80F91 Product Brief
PB013502-0104
eZ80Acclaim!™ Flash Microcontrollers
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