EZ80F91MCU Datasheet, PDF (40/396 Pages) Zilog, Inc. – eZ80Acclaim-TM Flash Microcontrollers

eZ80F91 MCU
Product Specification
21
Table 2. Pin Identification on the eZ80F91 Device (Continued)
LQFP BGA
Pin # Pin#
Symbol
Function
Signal Direction
Description
91 G10 PC1
GPIO Port C
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 C
pin, when programmed as output,
can be selected to be an open-
drain or open-source output. Port
C is multiplexed with one UART.
RxD1
Receive Data
Schmitt-trigger input
This pin is used by the UART to
receive asynchronous serial data.
This signal is multiplexed with
PC1.
92 G9
PC2
GPIO Port C
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 C
pin, when programmed as output,
can be selected to be an open-
drain or open-source output. Port
C is multiplexed with one UART.
RTS1
Request to
Send
Output, Active Low
Modem control signal from
UART. This signal is multiplexed
with PC2.
93 F12 PC3
GPIO Port C
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 C
pin, when programmed as output,
can be selected to be an open-
drain or open-source output. Port
C is multiplexed with one UART.
CTS1
Clear to Send Schmitt-trigger input, Modem status signal to the
Active Low
UART. This signal is multiplexed
with PC3.
Note: *PHY represents the physical layer of the OSI model.
PS019209-0504
PRELIMINARY
Architectural Overview