EZ80F91MCU ZILOG [Zilog, Inc.], EZ80F91MCU Datasheet - Page 36

• 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 #
73
74
Note: *PHY represents the physical layer of the OSI model.
BGA
Pin#
M12
L12
Symbol
PD0
TxD0
IR_TxD
PD1
RxD0
IR_RxD
Function
GPIO Port D
UART
Transmit Data
IrDA Transmit
Data
GPIO Port D
Receive Data
IrDA Receive
Data
P R E L I M I N A R Y
Signal Direction
Bidirectional
Output
Output
Bidirectional
Input
Input
Description
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 D
pin, when programmed as output,
can be selected to be an open-
drain or open-source output. Port
D is multiplexed with one UART.
This pin is used by the UART to
transmit asynchronous serial
data. This signal is multiplexed
with PD0.
This pin is used by the IrDA
encoder/decoder to transmit
serial data. This signal is
multiplexed with PD0.
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 D
pin, when programmed as output,
can be selected to be an open-
drain or open-source output. Port
D is multiplexed with one UART.
This pin is used by the UART to
receive asynchronous serial data.
This signal is multiplexed with
PD1.
This pin is used by the IrDA
encoder/decoder to receive serial
data. This signal is multiplexed
with PD1.
Product Specification
Architectural Overview
eZ80F91 MCU
17