EZ80F91MCU Datasheet, PDF (45/396 Pages) Zilog, Inc. – eZ80Acclaim-TM Flash Microcontrollers

eZ80F91 MCU
Product Specification
26
Table 2. Pin Identification on the eZ80F91 Device (Continued)
LQFP BGA
Pin # Pin#
Symbol
Function
Signal Direction
Description
107 C11 PB7
GPIO Port B
Bidirectional with
Schmitt-trigger input
This pin can be used for general-
purpose I/O. It can be individually
programmed as input or output
and can also be used individually
as an interrupt input. Each Port B
pin, when programmed as output,
can be selected to be an open-
drain or open-source output.
MOSI
SPI Master
Out Slave In
Bidirectional with
Schmitt-trigger input
The MOSI line is configured as an
output when the eZ80F91 device
is an SPI master device and as
an input when the eZ80F91
device is an SPI slave device.
This signal is multiplexed with
PB7.
108 B12
109 A12
V_SS
SDA
110 A11 SCL
Ground
I²C Serial Data Bidirectional
I²C Serial
Clock
Bidirectional
Ground.
This pin carries the I²C data
signal.
This pin is used to receive and
transmit the I²C clock.
111 B11 PHI
System Clock Output
This pin is an output driven by the
internal system clock. It can be
used by the system for
synchronization with the eZ80F91
device.
112 C10
V_DD
Power Supply
113 D9
V_SS
Ground
Note: *PHY represents the physical layer of the OSI model.
Power Supply.
Ground.
PS019209-0504
PRELIMINARY
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