EZ80F91MCU Datasheet, PDF (43/396 Pages) Zilog, Inc. – eZ80Acclaim-TM Flash Microcontrollers

eZ80F91 MCU
Product Specification
24
Table 2. Pin Identification on the eZ80F91 Device (Continued)
LQFP BGA
Pin # Pin#
Symbol
Function
Signal Direction
Description
101 D12 PB1
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.
IC1
Input Capture Schmitt-trigger input Input Capture B Signal to Timer
1. This signal is multiplexed with
PB1.
102 F8
PB2
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.
SS
SPI Slave
Schmitt-trigger input, The slave select input line is used
Select
Active Low
to select a slave device in SPI
mode. This signal is multiplexed
with PB2.
103 D11 PB3
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.
SCK
SPI Serial
Clock
Bidirectional with SPI serial clock. This signal is
Schmitt-trigger input multiplexed with PB3.
Note: *PHY represents the physical layer of the OSI model.
PS019209-0504
PRELIMINARY
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