EZ80L92MCU Datasheet, PDF (32/241 Pages) Zilog, Inc. – eZ80Acclaim Flash Microcontrollers

eZ80L92 MCU
Product Specification
17
Table 1. 100-Pin LQFP Pin Identification of the eZ80L92 Device (Continued)
Pin # Symbol
82 PC6
DCD1
83 PC7
RI1
84
V_SS
85
X_IN
86
X_OUT
87
V_DD
Function
Signal Direction
GPIO Port C Bidirectional
Data Carrier
Detect
GPIO Port C
Input, Active Low
Bidirectional
Ring Indicator Input, Active Low
Ground
System Clock Input
Oscillator Input
System Clock Output
Oscillator
Output
Power Supply
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
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.
Modem status signal to the UART. This
signal is multiplexed with PC6.
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.
Modem status signal to the UART. This
signal is multiplexed with PC7.
Ground.
This pin is the input to the onboard crystal
oscillator for the primary system clock. If an
external oscillator is used, its clock output
should be connected to this pin. When a
crystal is used, it should be connected
between X_IN and X_OUT.
This pin is the output of the onboard crystal
oscillator. When used, a crystal should be
connected between X_IN and X_OUT.
Power Supply.
PS013012-1004
PRELIMINARY
Architectural Overview