EZ80F91MCU ZILOG [Zilog, Inc.], EZ80F91MCU Datasheet - Page 37

• 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 #
75
76
77
Note: *PHY represents the physical layer of the OSI model.
BGA
Pin#
L11
K10
J9
Symbol
PD2
RTS0
PD3
CTS0
PD4
DTR0
Function
GPIO Port D
Request to
Send
GPIO Port D
Clear to Send Input, Active Low
GPIO Port D
Data Terminal
Ready
P R E L I M I N A R Y
Signal Direction
Bidirectional
Output, Active Low
Bidirectional
Bidirectional
Output, Active Low
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 control signal from
UART. This signal is multiplexed
with PD2.
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 PD3.
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 control signal to the
UART. This signal is multiplexed
with PD4.
Product Specification
Architectural Overview
eZ80F91 MCU
18