EZ80F91MCU ZILOG [Zilog, Inc.], EZ80F91MCU Datasheet - Page 52

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

Table 2. Pin Identification on the eZ80F91 Device (Continued)
PS019209-0504
LQFP
Pin #
141
142
143
144
Note: *PHY represents the physical layer of the OSI model.
System Clock Source Options
BGA
Pin#
C4
A3
B3
A2
System Clock.
clocking all internal logic. The SCLK source can be an external crystal oscillator,
an internal PLL, or an internal 32 kHz RTC oscillator. The SCLK source is selected
by PLL Control Register 0. RESET default is provided by the external crystal oscil-
lator. Refer to the CLK_MUX values in the PLL Control Register 0,
page 325 for details.
PHI.
nization to the eZ80F91 device. PHI is used as the reference clock for all
Characteristics.
External Crystal Oscillator.
modes. In one mode, the X
Symbol
RxD3
MDC
MDIO
WP
PHI is a device output driven by SCLK that can be used for system synchro-
Function
MII Receive
Data
MII
Management
Data Clock
MII
Management
Data
Write Protect
The eZ80F91 device’s internal clock, SCLK, is responsible for
P R E L I M I N A R Y
An externally-driven oscillator that can operate in two
IN
Signal Direction
Input
Output
Bidirectional
Schmitt-trigger input,
Active Low
pin can be driven by a can oscillator from DC up to
Description
This pin is used by the Ethernet
MAC for the MII Interface to the
PHY. Receive Data is provided
by the MII PHY Interface
synchronous to the rising-edge of
Rx_CLK.
This pin is used by the Ethernet
MAC for the MII Management
Interface to the PHY. The
Ethernet MAC provides the MII
Management Data Clock to the
MII PHY Interface.
This pin is used by the Ethernet
MAC for the MII Management
Interface to the PHY. The
Ethernet MAC sends and
receives the MII Management
Data to and from the MII PHY
Interface.
The Write Protect input is used by
the Flash Controller to protect the
Boot Block from Write and
ERASE operations.
Product Specification
Architectural Overview
eZ80F91 MCU
Table 207
AC
on
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