EZ80F91MCU ZILOG [Zilog, Inc.], EZ80F91MCU Datasheet - Page 38

• 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 #
78
79
80
81
82
Note: *PHY represents the physical layer of the OSI model.
BGA
Pin#
K12
K11
H8
J11
J12
Symbol
PD5
DSR0
PD6
DCD0
PD7
RI0
V
V
DD
SS
Function
GPIO Port D
Data Set
Ready
GPIO Port D
Data Carrier
Detect
GPIO Port D
Ring Indicator Input, Active Low
Power Supply
Ground
P R E L I M I N A R Y
Signal Direction
Bidirectional
Input, Active Low
Bidirectional
Input, Active Low
Bidirectional
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.
Modem status signal to the
UART. This signal is multiplexed
with PD5.
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.
Modem status signal to the
UART. This signal is multiplexed
with PD6.
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.
Modem status signal to the
UART. This signal is multiplexed
with PD7.
Power Supply.
Ground.
Product Specification
Architectural Overview
eZ80F91 MCU
19