EZ80F915005MODG Datasheet, PDF (14/22 Pages) Zilog, Inc. – Real-time clock support

eZ80F91 Mini Enet Module
Product Specification
10
Onboard Component Description
I/O Connector
The I/O connector features 32 general-purpose 3.3 V CMOS I/O pins that can be used as
outputs or inputs interfacing to external logic. All I/Os are 5 V tolerant. Some of the
general-purpose I/O pins support dual mode functions (SPI, Timer I/O, UARTs and bit I/O
with edge- or level-triggered interrupt functions on each pin). For more information on
eZ80F91 dual modes, refer to eZ80F91 Product Specification (PS0192).
Peripheral Bus Connector
The peripheral bus connector features 24-pins that provide access to the eZ80F91 Mini
Enet Module address bus and 8-pins that provide access to the module data bus. For more
information on eZ80F91 address and data buses, refer to eZ80F91 Product Specification
(PS0192).
Ethernet PHY and RJ45 Connector
The eZ80F92 Ethernet Module contains a Micrel KS8721BL 10/100 Ethernet PHY with
Media Independent Interface (MII) and a HALO RJ45 with integrated magnetics and two
LEDs (transformer and common-mode chokes).
The eZ80F92 Ethernet Module defaults to 10 Mbps, which works in either a 100 Mbps or
a 10 Mbps network. Software can also configure the PHY for 100 Mbps or autosense.
Ethernet LEDs
The Ethernet connection is provided by the HALO RJ45 connector. It contains two green
LEDs that are located next to each other on the eZ80F91 Mini Enet Module. When PHY is
receiving data, the left LED is on. When the PHY is transmitting data, the right LED is on.
5 MHz Clock
The eZ80F91 Mini Enet Module contains a 5 MHz crystal oscillator (Y2) which is
multiplied by the phase-locked loop in the eZ80F91 MCU to create a 50 MHz system
clock
PS023603-0907
PRELIMINARY
Onboard Component Description